This page provides you with plant checklists, plant keys,
and special plant information

about the flora in the
Four Corners states of Utah, Arizona, New Mexico, and Colorado.

Click to see photographs and descriptive material about flora in the Four Corners states.

State and Regional Plant Checklists and Keys

A) Colorado 
Catalog of the Colorado Flora, Weber and Wittman
University of Colorado Plant Databases 
A Checklist of the Vascular Plants of Colorado, Hartman and Nelson

Checklist of Vascular Flora, Yucca House Nat'l Monument
Checklist of Flora, Montezuma and Dolores Counties, Rocky Mountain Herbarium, Lynn Moore

Rich Scully's Key to Potentillas of Colorado  
Rich Scully's Key to Lamiaceae (Mints) of Colorado 
Rich Scully's Key to Solanaceae (Nightshades) of Colorado
Craig Freeman's Key to Colorado Chenopodium and Teloxys
Bill Jennings' Key to Colorado Phlox

Don Farrar and Steve Popovich's Key to Botrychium & other Ophioglossaceae

B) New Mexico
New Mexico Plant Lists and Floras
Checklist of New Mexico Flora 
Kelly Allred's Checklists and Keys for New Mexico Flora

Glenn Rink's Checklist of the Flora of Aztec National Monument
Glenn Rink's Checklist of the Flora of El Moro National Monument

From the "New Mexico Botanist": 1) Sivinski's Key to Mentzelia of New Mexico
                                                   2) Alexander's Key to Heuchera of New Mexico
                                                   3) Keller's Notes on Senecio and Packera in Northern New Mexico
Glenn Rink's Checklist of the Flora of Canyon de Chelly National Monument

D) Regional Checklists & Keys
Four Corners Flora Catalog by Ken Heil and Steve O'Kane
Southern Rocky Mountain Region, Checklist of Vascular Plants, 2009 version, by Neil Snow

Vegetative Key to Willows


Special Plant Information

Neil Snow's Three-letter Family Acronyms for Vascular Plants



Checklists of Plants in the Four Corners Region

The following table provides you with:
1) Plant lists compiled on Native Plant Society field trips in the Four Corners area.
2) Plant lists compiled by Native Plant Society members on their own private trips.
3) Checklists of plants known to occur in certain regions, for instance, the "Alpine Checklist".

Lists are in easily printed PDF format.  Click on the number in either the family or genus column to print an alphabetized list.

Please note the following about the plant lists:
1) Some plants on the lists were quite common in the area surveyed; some were uncommon or even rare.  The abundance of each plant is not always indicated on the lists.
2) Lists may have errors for a number of reasons, including mistaken identification.
3) Scientific plant names on the field trip plant lists may vary from those names presently accepted because some plant names have changed since the lists were compiled.  Most plant names conform to various editions of Weber and Wittmann's Colorado Flora: Western Slope, but they are being updated to agree with the more universally accepted names given by John Kartesz.




Leaders Recorders
# of pages alphabetized  by family
# of pages alphabetized by genus

Alpine Checklist for the Western San Juan Mountains of Colorado

Compiled by John Bregar


This is a compilation of a number of plant lists from many alpine areas in the Western San Juan Mountains.

American Basin, Uncompahgre Mts., W. of Lake City


Gay Austin Stanley Smookler Hike through American Basin to Sloan Lake, 11300 ft. to 12000 ft.
Beautiful Mt, Navajo Reservation, New Mexico


Arnold Clifford Many trip participants



Black Rock Canyon, Carrizo Mts., Arizona


Arnold Clifford, Sandy Friedley, Charlie King Mary Kemp Comments: Plants of special interest include Astragalus calycosus, A. coltonii, Erigeron argentius, Heuchera rubescens, Petrophyton ceaspitosum, Phlox austromontana, P. cluteana.
E = endemic to Colorado; I = introduced; G or S+# = global occurrences, 1 = < 5, 2 = 6-20, 3 = 21-100 populations, 4 or 5 = secure but rare in parts of range, esp. at periphery; LE or LT = listed as endangered or threatened
Bridal Veil Creek Trail, Telluride


Connie Colter & Al Schneider

Betty Schneider



The list covers only the first 1 1/2 miles of the Trail and will be added to in future years.

Canyons of the Ancients National Monument


Leslie Stewart, Chief Ecologist of the Canyons of the Ancients & Al Schneider



This plant list was compiled from ~2002-2007 by staff of the BLM in Dolores, Colorado. 

Al Schneider updated the list and added species from ~2005-2011.

Canyons of the Ancients National Monument, Sand Canyon


Leslie Stewart, Sue Komarek Leslie Stewart Trip to feature plant communities.

Cedar Mesa & vicinity: SE Utah from Natural Bridges to Valley of the Gods


Rick Brune, Loraine Yeatts Loraine Yeatts Site: A = Arch Canyon, BS = blow sand site N. of Bluff, CC = Cow Can., CM = Cedar Mesa, CR = Comb Ridge at UT hwy163, CW = Comb Wash camp at mouth of Arch Can., CW163 = Comb Wash at UT hwy 163, MC = Mule Can., NB = Natural Bridges, SI = Sand Island, VG = Valley of the Gods.
Rare or endangered plants: Asclepias cutleri, Astragalus cronquistii, Erigeron kachinesis, Eriogonum clavellatum.

Chuska Mts., New Mexico-Arizona Border


Arnold Clifford, Sandy Friedley, Charlie King Scott Ellis, Loraine Yeatts Comments: Tohatchi, NM, north along spine of Chuska Mts., to Red Rock, Az, to US 666 and Shiprock, NM
Plants of special interest: Astragalus chuskanus, endemic to Chuska Mts., Lesquerella navajoensis, Lysimachia hybridum, Cryptantha setosissima, Mentzelia sp. nov.
I = introduced; G or S+# = global occurrences, 1 = < 5, 2 = 6-20, 3 = 21-100 populations, 4 or 5 = secure but rare in parts of range, esp. at periphery; LE or LT = listed as endangered or threatened

CO Nat'l Mon., Ute Canyon


Bob Clarke Bob Clarke Comments: E = endemic to Colorado; I = introduced; G or S+# = global occurrences, 1 = < 5, 2 = 6-20, 3 = 21-100 populations, 4 or 5 = secure but rare in parts of range, esp. at periphery; LE or LT = listed as endangered or threatened
De-Na-Zin Wilderness, New Mexico


Clifford & Schneider Yeatts, Turner, Bregar, Ward  

Delta and vicinity. (Also see "Escalante")


Jim Ratzloff, Scott Ellis Jim Ratzloff Field trip to observe Mancos shale vegetation between Paonia & Delta and visit hanging garden sites of Escalante Canyon, west of Gunnison River after a year of exceptional rain.    . = plants of extremely restricted distribution or endemics limited to area visited.

Dinosaur National Monument


Lynne Riedel Loraine Yeatts * = not in bud, bloom, or fruit

Dinosaur National Monument


Tamara Naumann Loraine Yeatts Trip route followed road N from Monument Headquarters to Harpers Corner with stops at following overlooks & trails. P = Plug Hat Butte, E = Escalante Overlook, C = Canyon Overlook, F = Fremont rockart site, I = Island Park Overlook & trail, H = Harpers Corner Trail
Plants of Special Concern: Oreocarya rollinsii, Boechera fernaldiana
Peripheral: Fritillaria pudica
New records for DINO: Holosteum umbellatum, Ranunculus jovis

Dolores River, Bradfield Bridge Area


Leslie Stewart Leslie Stewart ADV = non-native
Sites visited: 1 = Dolores R.; 2 = dry west facing hillside next to Dolores R.; 3 = Pinon Juniper flat above Narraguinnep Creek

Escalante Canyon near Delta


Peggy Lyon Theron Hunter and Loraine Yeatts
Eureka Gulch, Silverton


John Bregar John Bregar 112 species observed

Farmington, NM and vicinity


Ken Heil, Mark Porter Loraine Yeatts, Arnold Clifford, Bill Jennings Comments: Ken Heil, San Juan College, Mark Porter, Santa Ana College, PLM specialist, Arnold Clifford, Ecosphere botanist, and Carolyn Crawford, ASC specialist, led premier tour of rare plant sites: 1=San Juan College & vicinity, 3=BLM Critical Habitat, 4=Hogback, 5=Bloomfield vicinity, 6=La Boca. Plant encountered at but not necessarily restricted to listed site number. Rare plants: Penstemon breviculus, Asclepias sanjuanensis, Sclerocactus mesae-verde, S. cloveriae sp. brackii, Pediocactus knowltonii, Astragalus humillimus, A. proximus, Gilia formosa. = not in bloom.

Five Springs Farm, Monument Canyon


Dana Price Price Family & Al Schneider

Four Corners, Montezuma County


Richard Moseley & Charlie King Richard Moseley, Charlie King, Susan Komarek Trip to 1 = Mesa Verde National Park; 2 = Mancos shale sites S of Pagosa; 3 = Pizza Hut site w of Pagosa; 4 = Chimney Rock site.
= endemic species
Gold Knob, La Sal Mountains, Utah


Mindy Wheeler Bill Gray with Al & Betty Schneider   Plant Survey for Grand Canyon Trust

Grand Mesa Fen Inventory


Bob Clarke Bob Clarke Comments: Trip to Kannah Creek headwaters
E = endemic to Colorado; I = introduced; G or S+# = global occurrences, 1 = < 5, 2 = 6-20, 3 = 21-100 populations, 4 or 5 = secure but rare in parts of range, esp. at periphery; LE or LT = listed as endangered or threatened

Gunnison Basin Lichens


Sally White, Larry St. Clair Sally White

Site: Dry Gulch, 6 mi. E of Gunnison, 1/4 mi E on power line road near sandstone outcrop
List reviewed by Dr. Larry St. Clair

Hovenweep Ruins


Leslie Stewart Leslie Stewart Trip highlighting flora of Hovenweep National Monument
ADV = non native
Kennebec Pass 2000-2014 Al Schneider Al Schneider 4    

Kennebec Pass, La Plata Mountains


Sue Komarek Sue Komarek, Leslie Stewart

Lake Hope Trail

July 28, 2011

Connie Colter & Al Schneider

Betty Schneider


This list covers a bit less than the first two miles of the trail.  The list will be added to in future years.

Lizard Head Trail


Al Schneider

Al & Betty Schneider & Connie Colter



Lone Mesa State Park


Al Schneider & Peggy Lyon

Al Schneider & Peggy Lyon

Several pages; configure your printer.


Mesa Verde National Park, Prater Ridge Trail

5/20 & 6/17, 2006

Al Schneider Al Schneider, Leslie Stewart, Mary Kemp Found Fritillaria atropurpurea and Iliamna grandiflora, rare plants for Mesa Verde

Mesa Verde National Park


Dick Moseley, Charlie King Marian J. Rohman, Charlie King Rare plant tour with Marilyn Colyer

Montezuma County: Haycamp Mesa and Hovenweep National Monument


Carol Brandt Velma Richards, Loraine Yeatts Haycamp Mesa, T37N R14W S10,17,18 along road, USGS map 7.5' Dolores East, CO.
Hovenweep, Montezuma Co, CO & San Juan Co., UT, USGS map 15' Cajon Mesa, UT.
Narraguinnep Canyon RNA compilation list: 2000-2010 2001-2010 Leslie Stewart and Al & Betty Schneider Leslie Stewart and Al & Betty Schneider   This plant list is a compilation of lists made by USFS Ecologist, Leslie Stewart, and Narraguinnep Natural area Stewards, Al & Betty Schneider from 2000-2010.

Narraguinnep Canyon RNA, NW of Cortez


Leslie Stewart Leslie Stewart Trip to explore Narraguinnep Canyon and contribute to plant species list for Forest Service RNA  I = introduced alien species.

Opal Lake, south of Pagosa Springs


Susan Halabrin

Bob Powell


Owl Creek Pass near Ridgway


Peggy Lyon & Al Schneider Peggy Lyon & Al Schneider Plants recorded along road to Owl Creek Pass and along Courthouse Trail.

Pagosa Peak, N of Pagosa Springs


Charley King, Richard E. Moseley, Jr. Charley King, Richard E. Moseley, Jr. Trip to Nichol's Draw uplands and wetlands on slopes of Pagosa Peak
I = Piedra Rd. roadside near Hatcher Lake
II = Perry Dr. roadside near Jack's Pasture Rd.

Pagosa Springs, west of


Dick Moseley, Charlie King Leslie Stewart Trip in Pagosa Springs area: 1 = Mancos Shale site ca. 2 mi S of intersection US160 & US84; 2 = Turkey Springs area on Newt Jack rd. off Piedra road ca. 7 mi NW of US 160; 3 = Piedra R. Canyon, S of Piedra road bridge at Hinsdale Co. line; A = non-native, E = endemic

Pass Creek Trail, Coal Bank Pass north of Durango


Travis Ward, Al Schneider, Bob Powell

Travis Ward, Al Schneider, Bob Powell

This list will be updated with common names added late in 2010.

Placer Gulch Alpine, north of Silverton

July 20, 2011

John Bregar

John Bregar and group


Sharkstooth Trail 2000-2014 Al & Betty Schneider Al & Betty Schneider 4    

Stony Pass


John Bregar

Trip Participants

120 species observed

Unaweep Canyon, between Gateway and Whitewater


Scott Ellis Bob Powell WM = wet meadow, MM = Meadow margins, DG = disturbed ground, PJ = Pinyon-Juniper woodland.

Uncompahgre Wilderness, West of Ridgway


Gay Austin Stanley Smookler Trip route followed trail to Uncompahgre Peak, starting at 11400 ft. elev. to +1200 ft.

Utah Hanging Gardens, NW of Bluff Utah


Arnold Clifford, Sandy Friedley, Charlie King Loraine Yeatts Comments: Due to dry conditions and season, most plants not blooming; no comprehensive plant list made
Special plants: Primula specuicola, Epipactis gigantea, Anticlea (Zygadenus) vaginata, Erigeron kachinesis, Phacelia indecora, habenaria zoethcina
Sites: b = alcove in Bluff sandstone, j = John's Canyon (limestone stream bank terraces in Lower Rico Form.), r = Road Canyon (Cedar Mesa Sandstone vertical cliff seeps)

Vallecito Creek, East of Durango


Sandy Friedley Sandy Friedley, Leslie Stewart Trip to visit plant communities of Vallecito Creek.

Wolf Creek Pass


Dick Moseley, Sara Brinton, Charlie King Dick Moseley, Sara Brinton, Charlie King Trip to high subalpine and alpine plant communities near Lobo Overlook and above Wolf Creek Pass.