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Bold=Widely accepted scientific name provided by John Kartesz, ultimate authority for all plant names on this web site.
Not bold = synonym for the scientific name.


ssp.=subspecies       var.=variety
GENUS AND SPECIES COMMON NAME SCIENTIFIC FAMILY NAME COMMON FAMILY NAME COLOR OF FLOWER,
TYPE OF PLANT
VEGETATION ZONE HABITAT SEASON
OF
BLOOM
Machaeranthera bigelovii Tansy Aster Asteraceae Sunflower Purple Foothills, montane, subalpine Disturbed areas, openings Fall
Machaeranthera canescens Tansy Aster Asteraceae Sunflower Purple Foothills, montane, subalpine Disturbed areas, openings Fall
Machaeranthera coloradoensis Colorado Tansy Aster Asteraceae Sunflower Pink Montane, subalpine, alpine Meadows, openings, rocks, tundra Summer
Machaeranthera grindelioides   Asteraceae Sunflower Yellow Semi-desert Openings, rimrock Spring
Machaeranthera pinnatifida   Asteraceae Sunflower Yellow Semi-desert Openings, hillsides Spring
Mahonia fremontii Barberry Berberidaceae Barberry Yellow Semi-desert Shrublands, woodlands,
openings
Spring
Mahonia repens Oregon Grape Berberidaceae Barberry Yellow Foothills, montane, subalpine Woodlands, openings Spring
Maianthemum amplexicaule Solomon's Plume Ruscaceae Butcher's Broom White Montane, subalpine Woodlands Spring
Maianthemum racemosum
ssp.
amplexicaule
Solomon's Plume Asparagaceae Asparagus White Montane, subalpine Woodlands Spring
Maianthemum stellatum Star Lily Asparagaceae Asparagus White Montane, subalpine Woodlands Spring
Malacothrix sonchoides Desert Dandelion Asteraceae Sunflower Yellow Semi-desert, foothills Openings, meadows Spring, summer
Malcolmia africana African Mustard Brassicaceae Mustard Pink Semi-desert, foothills Disturbed areas, openings Spring, summer
Malva neglecta Cheeseweed Malvaceae Mallow Pink Foothills Disturbed areas Summer
Marrubium vulgare Catnip Lamiaceae Mint White Foothills Disturbed areas Spring, summer
Medicago lupulina Black Medic Fabaceae Pea Yellow Foothills, montane Disturbed areas, road and trail-sides, lawns Spring, summer
Medicago sativa Alfalfa Fabaceae Pea Blue Foothills, montane Fields, openings Spring, summer,
fall
Melilotus alba White Sweet Clover Fabaceae Pea White Semi-desert, foothills, montane Disturbed areas, meadows Spring, summer
Melilotus officinalis Yellow Sweet Clover Fabaceae Pea Yellow Semi-desert, foothills, montane Disturbed areas, meadows Spring, summer
Mentha arvensis Mint Lamiaceae Mint Blue Montane Wetlands Summer
Mentzelia albicaulis White-stemmed
Mentzelia
Loasaceae Loasa Yellow
Desert, semi-desert
Shrublands, openings
Spring
Mentzelia pterosperma Hard Seed Mentzelia Loasaceae Loasa Yellow Desert, semi-desert Shrublands, openings Spring
Mentzelia rusbyi

Rusby's Mentzelia

Loasaceae Loasa Yellow Semi-desert, foothills Openings Summer
Menyanthes trifoliata Buckbean Menyanthaceae Buckbean White Montane, subalpine Ponds Summer
Mertensia brevistyla Bluebells Boraginaceae Forget-Me-
Not
Blue Foothills, montane Woodlands, meadows, openings Spring, summer
Mertensia ciliata Fringed Bluebells Boraginaceae Forget-Me-
Not
Blue Montane, subalpine Streamsides Summer
Mertensia franciscana Franciscan Bluebells Boraginaceae Forget-Me-
Not
Blue Montane, subalpine Streamsides Summer
Mertensia fusiformis Spindle-rooted
Bluebells
Boraginaceae Forget-Me-
Not
Blue Foothills, montane Woodlands, meadows, openings Spring, summer
Mertensia  lanceolata Lance-leaf Bluebells Boraginaceae Forget-Me-
Not
Blue  Foothills to alpine Woodlands, meadows, openings Spring, summer
Mesynium aristatum Yellow Flax Linaceae Flax Yellow Semi-desert Shrublands,
openings
Spring, summer
Mesynium puberulum Yellow Flax Linaceae Flax Yellow Semi-desert, foothills Openings, meadows Spring
Micranthes odontoloma Brook Saxifrage Saxifragaceae Saxifrage White Subalpine Streamsides Summer
Micranthes oregana Split Snowball Saxifrage Saxifragaceae Saxifrage White Montane, subalpine, alpine Marshy areas, tundra Summer
Micranthes rhomboidea Snowball Saxifrage Saxifragaceae Saxifrage White Montane, subalpine, alpine Tundra, rocks, openings Summer
Microsteris gracilis Graceful Phlox Polemoniaceae Phlox White Foothills Openings, shrublands, woodlands Spring
Mimulus eastwoodiae Eastwood's Monkeyflower Phrymaceae
formerly
Scrophulariaceae
Lopseed Red      
Mimulus guttatus Yellow Monkeyflower Phrymaceae
formerly
Scrophulariaceae
Lopseed Yellow Montane, subalpine Streamsides Summer
Mimulus suksdorfii Suksdorf's Monkeyflower Phrymaceae
formerly
Scrophulariaceae
Lopseed Yellow Semi-desert Sand, openings Spring
Mimulus tilingii var. tilingii Tiling's Monkeyflower Phrymaceae
formerly
Scrophulariaceae
Lopseed Yellow Subalpine Streamsides Summer
Large-flower Sandwort
Caryophyllaceae Pink White Alpine Tundra Summer
Alpine Sandwort Caryophyllaceae Pink White Alpine Tundra Summer
Red Sandwort Caryophyllaceae Pink White Subalpine, alpine
Scree, tundra
Summer
Mirabilis linearis var. linearis Narrow-leaf Four O'Clocks Nyctaginaceae Four O'Clock Pink Semi-desert, foothills Woodlands, openings, roadsides Summer, fall
Mirabilis multiflora
Showy Four O'Clocks Nyctaginaceae Four O'Clock Pink Semi-desert, foothills Roadsides, open canyons Spring, summer,
fall
Mirabilis oxybaphoides Trailing Four O'Clocks Nyctaginaceae Four O'Clock Pink Semi-desert, foothills Woodlands, roadsides, openings Summer, fall
Mitella pentandra Green Mitrewort Saxifragaceae Saxifrage Green Montane, subalpine Woodlands, wetlands Summer
Mitella stauropetala White Mitrewort Saxifragaceae Saxifrage White Montane, subalpine Woodlands,  streamsides, wetlands Summer
Moehringia macrophylla Large-leaf Sandwort Caryophyllaceae Pink White Montane, subalpine Moist, open woodlands Summer
Monardella odoratissima Aromatic Little Monarda Lamiaceae Mint Pink Foothills, montane, subalpine Open rocky areas Summer, fall
Moneses uniflora Single Delight Ericaceae Heath White Montane, subalpine Woodlands Summer
Monolepis nuttalliana Nuttall's Poverty Weed Amaranthaceae
formerly
Chenopodiaceae
Amaranth
formerly
Goosefoot
Red Semi-desert Shrublands, openings Spring
Slender Lip Fern
Pteridaceae Maidenhair Fern Fern Foothills, montane Rocks Spring
               

GENUS AND SPECIES COMMON NAME SCIENTIFIC FAMILY NAME COMMON FAMILY NAME COLOR OF FLOWER,
TYPE OF PLANT
VEGETATION ZONE HABITAT SEASON
OF
BLOOM
Nama retrorsum Howell's Nama Boraginaceae Forget-Me-Not Pink Semi-desert Open sands Spring
Nasturtium officinale Water Cress Brassicaceae Mustard White Semi-desert, foothills, montane Springs, streams Summer
Navarretia breweri Yellow Pincushion Polemoniaceae Phlox Yellow Foothills, montane Openings, woodlands Summer
Navarretia sinistra
ssp.
sinistra
Alva Day's Gilia Polemoniaceae Phlox White Semi-desert, foothills Openings Spring
Negundo aceroides Box Elder Sapindaceae
formerly
Aceraceae
Soapberry
formerly
Maple
Tree Semi-desert, foothills, montane Washes, streamsides  Spring
Neokochia americana Green Molly Amaranthaceae
formerly
Chenopodiaceae
Amaranth
formerly
Goosefoot
Brown/
Green
Semi-desert Shrublands, openings Spring
Neottia cordata Heartleaf Twayblade Orchidaceae Orchid Green Subalpine Wetlands, streamsides Summer
Nicotiana attenuata Coyote Tobacco Solanaceae Nightshade White Semi-desert, foothills Openings, woodlands Summer, fall
Noccaea fendleri
ssp
. glauca
Wild Candytuft Brassicaceae Mustard White Foothills, montane, subalpine Woodlands, openings, meadows Spring, summer
Noccaea montana Wild Candytuft Brassicaceae Mustard White Semi-desert foothills, montane, subalpine Woodlands, openings, meadows Spring, summer
Nuttallia pterosperma Mentzelia Loasaceae Loasa Yellow Desert, semi-desert Shrublands, openings Spring
Oenothera albicaulis White-stemmed
Evening Primrose
Onagraceae Evening Primrose White Semi-desert, foothills Sandy openings Spring
Oenothera caespitosa Matted Evening Primrose Onagraceae Evening Primrose White Semi-desert, foothills, montane Disturbed areas, openings Spring
Oenothera elata
ssp.
hirsutissima
Hooker's Evening Primrose Onagraceae Evening Primrose Yellow Foothills, montane Wet meadows and roadsides Summer
Oenothera flava ssp. flava Yellow Evening Primrose Onagraceae Evening Primrose Yellow Foothills, montane Openings, meadows Spring, summer
Oenothera coronopifolia Cut-leaf Evening Primrose Onagraceae Evening Primrose White Foothills, montane Woodlands, openings Spring, summer
Oenothera lavandulifolia Sundrops Onagraceae Evening Primrose Yellow Semi-desert Shrublands, openings Spring, summer
Oenothera longissima Bridges Evening Primrose Onagraceae Evening Primrose Yellow Semi-desert Washes, streams Summer, fall
Oenothera pallida Pale Evening Primrose Onagraceae Evening Primrose White Semi-desert Shrublands, openings Spring, summer
Oligosporus dracunculus Wild Tarragon Asteraceae Sunflower Yellow Foothills, montane Rocky openings, roadsides Summer
Onobrychis viciifolia Sain Foin Fabaceae Pea Pink Foothills, montane Roadsides Summer, fall
Opuntia fragilis Potato Cactus Cactaceae Cactus Yellow Semi-desert, foothills Sandy and rocky openings Summer
Opuntia phaeacantha Prickly Pear Cactus Cactaceae Cactus Yellow Semi-desert, foothills Openings Spring, summer
Opuntia polyacantha
Prickly Pear Cactus
Cactaceae Cactus Yellow,
red
Semi-desert, foothills Openings Spring, summer
Oreobroma nevadense

Bitterroot,
Lewesia

Montiaceae
formerly
Portulacaceae
Miner's Lettuce
formerly
Purslane

White,
pink
Montane Meadows, open woods Spring, summer
Oreobroma pygmaea Bitterroot, Lewesia Montiaceae
formerly
Portulacaceae
Miner's Lettuce
formerly
Purslane
Pink Montane, subalpine, alpine Woodlands, openings, meadows, tundra Spring, summer
Oreocarya flava Yellow Cryptantha Boraginaceae Forget-Me-Not Yellow Semi-desert, foothills Openings Spring
Oreocarya flavoculata Little Yellow Cat's Eye Boraginaceae Forget-Me-Not White Semi-desert, foothills Openings Spring
Oreocarya fulvocanescens Gray Cat's Eye Boraginaceae Forget-Me-Not White/
Yellow
Semi-desert Openings Spring
Oreocarya humilis Humble Cat's Eye Boraginaceae Forget-Me-Not White Semi-desert Openings Spring
Oreocarya paradoxa Marvelous Cat's Eye Boraginaceae Forget-Me-Not White Semi-desert Openings Spring
Oreocarya revealii Reveal's Cat's Eye Boraginaceae Forget-Me-Not White Semi-desert Openings Spring
Oreocarya suffruticosa
variety pustulosa
Shrubby Cat's Eye Boraginaceae Forget-Me-Not White Semi-desert Openings Spring, summer
Oreocarya tenuis Slender Cat's Eye Boraginaceae
Forget-Me-Not
White Semi-desert Openings Spring
Oreochrysum parryi Parry's Goldenweed Asteraceae Sunflower Yellow Subalpine Woodlands Summer
Oreoxis alpina ssp. alpina Alpine Parsley Apiaceae Parsley Yellow Alpine Montane to tundra Summer
Oreoxis bakeri
Baker's Alpine Parsley
Apiaceae Parsley Yellow Alpine Sub-alpine to tundra Summer
Orobanche cooperi  Cooper's Broomrape Orobanchaceae Broomrape Purple Semi-desert Woodlands, openings Spring, summer
Orobanche fasciculata
Bundled Broomrape
Orobanchaceae Broomrape Red Foothills, montane Openings, shrublands,  woodlands Summer
Single-flower
Broomrape
Orobanchaceae Broomrape Red Semi-desert, foothills, montane Openings, shrublands,  woodlands Summer
Orogenia linearifolia Turkeypea, Indian Potato Apiaceae Parsley White Foothills, montane Meadows Spring
Orthilia secunda One-sided Wintergreen Ericaceae
formerly
Pyrolaceae
Heath
formerly
Pyrola

White
Montane, subalpine Woodlands Summer
Orthocarpus luteus Yellow Owl-clover Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Yellow Foothills, montane Woodlands Summer
Orthocarpus purpureoalbus Purple Owl-clover Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Purple/
white
Foothills, montane Woodlands Summer
Osmorhiza berteroi
Mountain Sweet Cicely
Apiaceae Parsley White Montane, subalpine Woodlands Spring, summer
Osmorhiza chilensis
Mountain Sweet Cicely
Apiaceae Parsley White Montane, subalpine Woodlands Spring, summer
Osmorhiza depauperata Dwarf Sweet Cicely Apiaceae Parsley White Montane, subalpine Woodlands Spring, summer
Osmorhiza occidentalis Western Sweet Cicely Apiaceae Parsley Yellow Montane, subalpine Woodland, meadows Spring, summer
Ostrya knowltonii
var. knowltonii  
 
Western Hophornbeam Betulaceae Birch Family Tree Semi-desert Canyons Spring
Oxalis dillenii Yellow Wood Sorrel Oxalidaceae Wood Sorrel Yellow Montane Openings Summer
Oxalis violacea Violet Wood Sorrel Oxalidaceae Wood Sorrel Blue Montane Openings Summer
Oxybaphus linearis Umbrellawort Nyctaginaceae Four O'Clock Pink Semi-desert, foothills Woodlands, openings, roadsides Summer, fall
Oxypolis fendleri Cowbane Apiaceae Parsley White Montane, subalpine Streamsides Spring, summer
Oxyria digyna Mountain Sorrel Polygonaceae Buckwheat Red Subalpine, alpine Tundra, scree Summer
Oxytenia acerosa Copperweed Asteraceae Sunflower Yellow Semi-desert Washes Summer
Oxytropis deflexa variety
foliolosa
Alpine Reclining Locoweed Fabaceae Pea Blue Alpine Tundra Summer
Oxytropis deflexa variety
sericea
Silky Reclining Locoweed Fabaceae Pea Blue Montane, subalpine Meadows Summer
Oxytropis lambertii
var.
bigelovii
Lambert's Locoweed Fabaceae Pea Pink Semi-desert, foothills, montane Openings, grasslands, shrublands, woodlands Spring, summer
Oxytropis parryi Parry's Locoweed Fabaceae Pea Blue Sub-alpine, alpine Rocky knolls, tundra Summer

GENUS AND SPECIES COMMON NAME SCIENTIFIC FAMILY NAME COMMON FAMILY NAME COLOR OF FLOWER,
TYPE OF PLANT
VEGETATION ZONE HABITAT SEASON
OF
BLOOM
Packera crocata Saffron Packera Asteraceae Sunflower Orange Montane, subalpine Woodlands, openings Summer
Packera dimorphophylla Two Leaf Packera Asteraceae Sunflower Yellow Subalpine, alpine Meadows, rocks, tundra Summer
Packera mancosana Mancos Shale Packera Asteraceae Sunflower Yellow Montane Openings Summer
Packera multilobata Many-lobed Packera Asteraceae Sunflower Yellow Semi-desert foothills Woodlands, openings Spring,
summer
Packera neomexicana
var. mutabilis
New Mexico Groundsel Asteraceae Sunflower Yellow Foothills, montane, subalpine Woodlands, openings Summer
Packera oodes Egg Packera Asteraceae Sunflower Yellow Foothills, montane Woodlands, openings Summer
Packera pseudaurea Streambank Groundsel Asteraceae Sunflower Yellow Montane Wetlands Summer
Rocky Mountain Groundsel Asteraceae Sunflower Yellow Foothills, montane Woodlands, openings Summer
Packera werneriifolia Werner's Groundsel Asteraceae Sunflower Yellow Subalpine, alpine Meadows, tundra, scree Summer
Padus virginiana Chokecherry Rosaceae Rose White Foothills, montane Shrublands, woodlands Spring
Parnassia fimbriata
var.
fimbriata
Fringed Grass of Parnassus Celastraceae

Staff-tree White Subalpine Streamsides, wetlands Summer
Parnassia parviflora Small Grass of Parnassus Celastraceae

Staff-tree White Montane, subalpine Streamsides, wetlands Summer
Paxistima myrsinites Mountain Lover Celastraceae Staff-tree Red Foothills, montane, subalpine Woodlands Spring
Pectiantia pentandra Green Mitrewort Saxifragaceae Saxifrage Green Montane, subalpine Woodlands, wetlands Summer
Pectis angustifolia
var. angustifolia
Lemonscent Asteraceae Sunflower Yellow Semi-desert Sand openings, shrublands Summer,
fall
Pedicularis bracteosa
var.
paysoniana
Fern Leaf Lousewort Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Yellow Subalpine Woodlands Summer
Pedicularis centranthera Spring Lousewort Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Pink Semi-desert, foothills Shrublands, woodlands Spring
Pedicularis groenlandica Elephant Heads Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Pink Subalpine Wetlands, streamsides Summer
Pedicularis parryi
ssp.
parryi
Parry's Alpine Lousewort Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Yellow Subalpine, alpine Woodlands, meadows, openings Summer
Pedicularis procera Towering Lousewort Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Yellow Montane, subalpine Woodlands, openings Summer
Pedicularis racemosa Parrot's Beak Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
White Subalpine Woodlands Summer
Pedicularis scopulorum Alpine Lousewort Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Pink Subalpine, alpine Rocky areas, wet areas, tundra. Summer
Pedicularis sudetica
ssp. scopulorum
Alpine Lousewort Orobanchaceae
formerly
Scrophulariaceae
Broomrape
formerly
Snapdragon
Pink Subalpine, alpine Rocky areas, wet areas, tundra. Summer
Pediocactus simpsonii Simpson's Pincushion Cactus Cactaceae Cactus Yellow Foothills Openings Summer
Pediomelum megalanthum
var. megalanthum
Indian Breadroot Fabaceae Pea White Semi-desert, foothills Openings, shrublands Spring
Penstemon angustifolius Narrow-leaf Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Semi-desert Woodlands, openings Spring,
summer
Penstemon barbatus Scarlet Bugler Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Red Semi-desert, foothills Woodlands, openings
Spring,
summer
Penstemon breviculus Short Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Semi-desert Openings Spring
Penstemon crandallii
(formerly identified here as
P. caespitosus
)
Crandall's Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Semi-desert, foothills, montane Openings Spring,
summer
Penstemon comarrhenus Hairy Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Foothills, montane Open woodlands Summer
Penstemon cyanocaulis Blue-stem Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Foothills Meadows, openings Spring, summer
Penstemon eatonii Eaton's Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Pink Semi-desert, foothills Openings, shrublands, woodlands Spring, summer
Penstemon hallii Hall's Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Alpine Scree Summer
Penstemon harbourii

Harbour's Penstemon

Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Alpine Scree Summer
Penstemon lentus
var.
lentus
and variety albiflorus
Thick Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Semi-desert, foothills Openings, woodlands Spring
Penstemon linarioides
ssp.
coloradoensis
Narrow-leaf Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Semi-desert, foothills Openings, woodlands Spring,
summer
Penstemon osterhoutii
(
see Penstemon lentus)
Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue/Purple Semi-desert, foothills Openings, woodlands Spring
Penstemon rostriflorus Bridges
Penstemon
Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Red Foothills Openings, woodlands Summer
Penstemon strictus Rocky Mountain Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Blue Foothills, montane, subalpine Meadows, openings Summer
Penstemon utahensis Utah Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Pink Semi-desert, foothills Canyons, openings, shrublands Spring
Penstemon whippleanus Penstemon Plantaginaceae
formerly
Scrophulariaceae
Plantain
formerly
Snapdragon
Purple Subalpine Woodlands, openings Summer
Pentaphylloides floribunda Shrubby Cinquefoil Rosaceae Rose Yellow Foothills, montane, subalpine Meadows Summer
Peraphyllum ramosissimum Squaw Apple Rosaceae Rose White Foothills Woodlands, openings Spring
Peritoma lutea
Beeplant
Cleomaceae Cleome Yellow Semi-desert, foothills, montane Shrublands, openings, disturbed areas Spring, summer
Peritoma serrulata
Rocky Mountain Bee Plant
Cleomaceae Cleome Pink Foothills, montane Roadsides, disturbed areas Summer, fall
Persicaria amphibia Water Smartweed Polygonaceae Buckwheat Pink Montane Lake edge Summer
Persicaria lapathifolia Dock-leaf Smartweed Polygonaceae Buckwheat White Foothills, montane Moist areas, pond edges, irrigation ditches Summer
Persicaria maculosa Spotted Lady's Thumb Polygonaceae Buckwheat Pink Foothills Irrigation ditches, marshes, moist disturbed areas Summer
Petradoria pumila Rock Goldenrod Asteraceae Sunflower Yellow Foothills Roadsides, woodlands, openings Summer
Petrophyton caespitosum Rockmat Rosaceae Rose White Semi-desert Canyons Summer, fall
Phacelia bakeri Baker's Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
Blue Subalpine, alpine Rocky openings Summer
Phacelia crenulata Crenulated Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
Blue Semi-desert Canyons, openings, sand Spring
Phacelia glandulosa
var.
glandulosa
Glandular Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
Blue Foothills,
montane
Rocky slopes,
hillsides
Summer
Phacelia heterophylla Varied-leaf Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
White Foothills, montane Woodlands, openings Spring, summer
Phacelia integrifolia Whole Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
White Semi-desert Sand, woodlands Spring
Phacelia ivesiana
var.
ivesiana
Ives' Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
White Semi-desert Sand, woodlands Spring,
summer
Phacelia sericea Silky Phacelia Boraginaceae
formerly
Hydrophyllaceae
Forget
Me-Not
formerly
Waterleaf
Purple Subalpine, alpine Meadows, openings, tundra Summer
Phemeranthus brevifolius Canyonlands Rockpink Montiaceae
formerly
Portulacaceae
Miner's Lettuce
formerly
Purslane
Pink Semi-desert
Rock depressions
Spring
Philadelphus microphyllus Mock Orange Hydrangeaceae Hydrangea White Semi-desert, foothills Woodlands, openings Early summer
Phlox austromontana Southern Phlox Polemoniaceae Phlox White Semi-desert, foothills Canyons, shrublands Spring
Phlox canescens Gray Phlox Polemoniaceae Phlox White Semi-desert, foothills Canyons, shrublands Spring
Phlox condensata Alpine Phlox Polemoniaceae Phlox White Alpine Meadows, tundra, rocks Summer
Phlox hoodii ssp. canescens Gray Phlox Polemoniaceae Phlox White Semi-desert, foothills Canyons, shrublands Spring
Phlox longifolia Long-leaf Phlox Polemoniaceae Phlox Pink/White Semi-desert, foothills Openings, shrublands Spring,
summer
Phlox multiflora Many-flower Phlox Polemoniaceae Phlox Pink/White Foothills Openings, shrublands Spring,
summer
Phoradendron juniperinum Juniper Mistletoe Santalaceae Sandalwood Yellow Foothills,
Montane
Woodlands Spring,
summer
Physaria acutifolia Double  Bladderpod Brassicaceae Mustard Yellow Semi-desert, foothills Shrublands, woodlands, openings Spring
Physaria fendleri Fendler's Bladderpod Brassicaceae Mustard Yellow Semi-desert Sand areas, shrublands Spring
Physaria pulvinata Cushion Bladderpod Brassicaceae Mustard Yellow Foothills Meadows Spring, summer
Physaria rectipes Straight Bladderpod Brassicaceae Mustard Yellow Semi-desert, foothills Woodlands Spring
Physaria scrotiformis Sac-like Bladderpod Brassicaceae Mustard Yellow Alpine Tundra Summer
Picea engelmannii Engelmann Spruce Pinaceae Pine Tree Montane, subalpine, alpine Woodlands Spring
Picea pungens Colorado Blue Spruce Pinaceae Pine Tree Montane, subalpine Woodlands Spring
Picrothamnus desertorum Spiny Sagebrush Asteraceae Sunflower Yellow Semi-desert Openings Spring
Pinus contorta var. latifolia Lodgepole Pine Pinaceae Pine Tree Montane, subalpine Woodlands Summer
Pinus edulis Pinyon Pine Pinaceae Pine Tree Semi-desert, foothills Woodlands Spring
Pinus flexilis Limber Pine Pinaceae Pine Tree Montane,sub-alpine Woodlands Summer
Pinus ponderosa
var.
scopulorum
Ponderosa Pine Pinaceae Pine Tree Foothills, montane Woodlands Spring
Plagiobothrys hispidulus Bristly Popcorn Flower Boraginaceae Forget-
Me-Not
White Foothills, montane Moist meadows, pond edges, openings Spring,
summer
Plagiobothrys scouleri Bristly Popcorn Flower Boraginaceae Forget-
Me-Not
White Foothills, montane Moist meadows, pond edges, openings Spring,
summer
Plantago eriopoda Plantain Plantaginaceae Plantain White Foothills, montane Openings Spring, summer
Plantago patagonica Woolly Plantain Plantaginaceae Plantain White Semi-desert, foothills Openings, canyons Spring, summer
Platanthera obtusata Blunt-leaf Orchid Orchidaceae Orchid White      
Platanthera spp. Bog Orchid Orchidaceae Orchid Green      
Platyschkuhria integrifolia
variety oblongifolia
Basin Daisy Asteraceae Sunflower Yellow Semi-desert Openings, hills Spring, summer,
fall
Pneumonanthe affinis Bottle Gentian Gentianaceae Gentian Blue Montane, subalpine, alpine Wet meadows Summer
Pneumonanthe parryi Mountain Gentian Gentianaceae Gentian Blue Subalpine, alpine Meadows, openings Summer, fall
Podistera eastwoodiae Eastwood's Woodroot Apiaceae Parsley Yellow Subalpine Meadows, woodlands Summer
Polemonium confertum Dense Sky Pilot Polemoniaceae Phlox Purple Alpine Tundra, scree Summer
Polemonium foliosissimum
var.
foliosissimum
Leafy Jacobs Ladder Polemoniaceae Phlox Blue Montane, subalpine Meadows Summer
Polemonium pulcherrimum
ssp.
delicatum
Beautiful
Jacobs Ladder
Polemoniaceae Phlox Blue Montane, subalpine Woodlands Summer
Polemonium viscosum Sky Pilot Polemoniaceae Phlox Purple Alpine Tundra, scree Summer
Poliomintha incana Gray Mint Lamiaceae Mint Blue Semi-desert Sand Spring
Polygala subspinosa Milkwort Polygalaceae Milkwort Pink Semi-desert Sand, gravel Spring
Polypodium hesperium Western Polypody Polypodiaceae Western
Polypody
Fern Montane Rocks Summer
Polystichum lonchitis Holly Fern Dryopteridaceae Shield Fern Fern Montane to alpine Rocks Summer
Populus alba Silver Poplar Salicaceae Willow Tree Foothills Roadsides, moist areas Spring
Populus angustifolia Narrowleaf Cottonwood Salicaceae Willow Tree Foothills, montane, subalpine Streamsides Spring
Populus deltoides
ssp. wislizeni
and ssp. fremontii
Cottonwood Salicaceae Willow Tree Semi-deserts, foothills Canyons, washes, streamsides Spring
Populus nigra Lombardy Poplar Salicaceae Willow Tree Foothills Farmlands, lawns Spring
Populus tremuloides Aspen Salicaceae Willow Tree Montane, subalpine Woodlands Spring
Portulaca oleracea Purslane or Portulaca Portulacaceae Portulaca Yellow Foothills Fields, lawns, disturbed areas Summer
Potentilla concinna Elegant Cinquefoil Rosaceae Rose Yellow Foothills to alpine Openings, woodlands Summer
Potentilla gracilis Slender Cinquefoil Rosaceae Rose Yellow Montane, subalpine  Meadows, openings Summer
Potentilla hippiana
var.
hippiana
Hippio's Cinquefoil Rosaceae Rose Yellow Montane Meadows, woodlands Summer
Potentilla nivea Snow Cinquefoil Rosaceae Rose Yellow Alpine Tundra Summer
Potentilla pensylvanica
var.
pensylvanica
Pennsylvania Cinquefoil Rosaceae Rose Yellow Foothills to subalpine  Meadows, rocky openings Summer
Potentilla plattensis Platte River Cinquefoil Rosaceae Rose Yellow Montane  Moist meadows Summer
Potentilla pulcherrima Beautiful Cinquefoil Rosaceae Rose Yellow Montane, subalpine  Meadows, openings Summer
Potentilla rubricaulis Red-stemmed Cinquefoil Rosaceae Rose Yellow Alpine  Scree, gravel Summer
Poterium sanguisorba
subspecies muricatum
Burnet Rosaceae Rose Red Foothills, montane  Shrublands, meadows Summer
Primula parryi Parry's Primrose Primulaceae Primrose Pink Alpine, subalpine Streamsides, wetlands Summer
Primula specuicola Alcove Primrose Primulaceae Primrose Blue/Pink      
Prosartes trachycarpa Fairybells Liliaceae Bellwort White Montane, subalpine Woodlands Spring, summer
Prunella vulgaris Self-heal Lamiaceae Mint Purple Montane, subalpine Woodlands, meadows Summer
Prunus virginiana Chokecherry Rosaceae Rose White Foothills, montane Shrublands, woodlands Spring
Pseudocymopterus
montanus
Mountain Parsley Apiaceae Parsley Yellow Foothills, montane, subalpine Woodlands, meadows Spring, summer
Pseudostellaria
jamesiana
Tuber Starwort Caryophyllaceae Pink White Foothills, montane Woodlands, openings Summer
Pseudotsuga menziesii
var.
glauca
Douglas Fir Pinaceae Pine Tree Foothills, montane, subalpine Woodlands Spring
Psilochenia intermedia   Asteraceae Sunflower Yellow Foothills Openings, woodlands Spring, summer
Psilochenia occidentalis   Asteraceae Sunflower Yellow Foothills Openings, woodlands Spring, summer
Psilochenia runcinata   Asteraceae Sunflower Yellow Montane Wet meadows Summer
Psilostrophe sparsiflora Paper Flower Asteraceae Sunflower Yellow Semi-desert Pinyon/Juniper woodlands, shrublands Summer, fall
Psychrophila leptosepala Marsh Marigold Ranunculaceae Hellebore White Subalpine Wetlands, openings, meadows Spring, summer
Pteridium aquilinum Bracken Fern Dennstaedtiaceae Bracken Fern Montane, subalpine Woodlands, openings Spring
Pterogonum alatum Winged Buckwheat Polygonaceae Buckwheat Yellow Semi-desert, foothills, montane Openings, shrublands, canyons, woodlands. Spring, summer
Pterospora
andromedea
Pinedrops Ericaceae
formerly
Monotropaceae
Heath
formerly
Pinesap
Brown Montane Woodlands Spring
Pulsatilla ludoviciana Pasqueflower Ranunculaceae Buttercup Violet Foothills - sub-alpine Woodlands, openings Early spring
Pulsatilla patens
ssp.
multifida
Pasqueflower Ranunculaceae Buttercup Violet Foothills - sub-alpine Woodlands, openings Early spring
Purshia stansburiana Cliff Rose Rosaceae Rose White Semi-desert, foothills Woodlands, shrublands, openings Spring
Purshia tridentata Buckbrush Rosaceae Rose White Semi-desert, foothills Woodlands, shrublands, openings Spring
Pyrola asarifolia
ssp.
asarifolia
Pink Pyrola Ericaceae
formerly
Pyrolaceae
Heath
formerly
Pyrola
Pink Montane, sub-alpine Wet woodlands, meadows, streamsides Summer
Pyrola chlorantha Green-flowered
Wintergreen
Ericaceae
formerly
Pyrolaceae
Heath
formerly
Pyrola
Green Montane Woodlands Summer
Pyrola minor Small Wintergreen Ericaceae
formerly
Pyrolaceae
Heath
formerly
Pyrola
White Montane, subalpine Woodlands Summer
Pyrola picta Variegated Pyrola Ericaceae
formerly
Pyrolaceae
Heath
formerly
Pyrola
Green Montane Woodlands Summer
Pyrola rotundifolia Pink Wintergreen Ericaceae
formerly
Pyrolaceae
Heath
formerly
Pyrola
Pink Montane, sub-alpine Wet woodlands, meadows, streamsides Summer
Pyrrocoma crocea
var. crocea
Goldenweed Asteraceae Sunflower Yellow Montane Meadows, woodlands Summer

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