Click to read about the app,
"Colorado Rocky Mountain Wildflowers".
Install the app on your phone or tablet and have it in the field with you to identify plants
from the foothills to the alpine of
Colorado, Utah, Arizona, New Mexico,
and all of the Rockies.

Click to see three plant species
that Betty and I were fortunate enough to discover:

Gutierrezia elegans

Packera mancosana

Ipomopsis ramosa

Click to see Heterotheca schneideri
which Guy Nesom named for us.

Click to read my proposal
for naming a new Castilleja species.

Click to see Senecio inexpectatus
which was named
based on our discovery of this species in Colorado.

Website Additions

Information added in 2023 and 2024

Review of Ackerfield's
"Flora of Colorado"
, 2nd edition

Adoxaceae is now Viburnaceae

The species Nama is now in Namaceae

Updates on Boechera information

Additions to biographies of
Meriwether Lewis
and Thomas Nuttall

More information about Hazel Schmoll, including a PDF of her PhD dissertation on the flora of Chimney Rock

Details about the first collections of
Astragalus schmolliae

All species are now labeled native or non-native.

Updated Ulmus pumila information and photographs

Lomatium dissectum has been renamed L. multifidum

Comparison of Lomatium and Cymopterus genera

Orogenia linearifolia has been renamed
Lomatium linearifolium

Pseudostellaria jamesiana has been renamed Torreyostellaria jamesiana

Illustrated glossary of Sunflower terminology

Glossary entry on "albino"

Biographical information on Sara and John Lemmon (Mt. Lemmon, Arizona & Cymopterus lemmonii

Update on Heterotheca entry

Plant List for the Hamilton Mesa Area of
Canyons of the Ancients National Monument

Updated Fern information

Name changes:
Iliamna grandiflora
is now Iliamna angulata
Drymocallis arguta
is now Drymocallis convallaria
Arenaria obtusiloba
is now Cherleria obtusiloba
Arenaria macrantha
is now Sabulina macrantha

Added biographical information about Jean Nicot (Nicotiana attenuata, nicotine).

During the winter of 2024 all pages of this website
were reviewed and updated.

Updated plant list for Grand Mesa.

I highly recommend two excellent
Colorado wildflower books
published in June of 2024
by enthusiastic and superb amateur botanists:

Wildflowers of Durango Trails

Crystal River Valley Wildflowers.


2024 Photographs added

Mirabilis multiflora
Galium coloradoense
Stenogonum flexum
Sclerocactus whipplei
Shepherdia rotundifolia
Drymocallis convallaria
Lupinus ammophilus
Turritis glabra (New species for this website and new record for Dolores County, Colorado)
Chamaenerion angustifolium
Viola scopulorum
Trifolium attenuatum
Pilosella aurantiaca (New species for this website and new record for Dolores County, Colorado)
Astragalus cicer
Melilotus officinalis

Tragopogon pratensis
Rudbeckia laciniata
Geranium caespitosum
Medicago sativa


2023 Photographs added

Epipactis gigantea
Thelypodiopsis aurea
Phacelia crenulata
Lappula redowskii
Ipomopsis polycladon
Allium textile
Yucca angustissima
Packera multilobata
Penstemon angustifolius
Astragalus mollissimus
Chaetopappa ericoides
Lepidium montanum
Penstemon eatonii
Astragalus wingatanus
Astragalus naturitensis
Ipomopsis pumila
Astragalus ceramicus
Tetraneuris ivesiana
Erigeron tracyi
Hedysarum boreale
Sphaeralcea leptophylla
Linanthus pungens
Arctostaphylos uva-ursi
Lathyrus pauciflorus
Astragalus bisulcatus
Antennaria parvifolia
Barbarea vulgaris (new species for this website)
Aconitum columbianum
Matricaria discoidea (new species for this website)
Epilobium hornemannii
Spiranthes romanzoffiana
Antennaria pulcherrima (new species for this website)
Oxypolis fendleri
Arnica mollis
Viola adunca variety bellidifolia
Ligusticum porteri
Pinus contorta
Cirsium tukuhnikivatzicum (newly named species)
Botrychium echo
Pteridium aquilinum

Caltha chionophila
Sorbus scopulina


List of Scientific Plant Name Changes

Click here for a list of species whose names have been changed recently.


Native Plants Discussion Groups

Do you have questions about native plants? Would you like to share information and enthusiasm about native plants? 

Join the Colorado and/or New Mexico Native Plants online botanical discussion groups for amateurs and professionals. Participate as much or as little as you want to. Send in photographs of native plants for identification and discuss key issues about conserving native plants, techniques for growing native plants in your garden, plant photography, etc.

Be aware that the first two Facebook pages linked immediately below often have irrelevant, wandering, misinformed comments. The third link below is to the New Mexico listserv group which is very good with well thought out questions and very courteous and helpful responses. 

1)  Click to join the ColoradoNativePlant Facebook discussion group.

2)  Click to join the Colorado Native Plant Society Facebook Plant discussion group.

3)  Click to join the New Mexico native plant discussion group.


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Below you will find comments about several floras of the Four Corners states. For more detailed comments click here.

Floras are complex and time consuming to write. They demand expertise in the plants of an area but also expertise in technical writing, logic, and scientific precision.

Flora of the Four Corners Region by Heil and O'Kane is the best flora for the Four Corners region (and beyond) and has the great advantage of being put together by many experts, not just one author (as in Weber's Colorado Flora and Ackerfield's Flora of Colorado).

A Utah Flora by Welsh is often the flora I turn to for the best keys and most interesting and accurate comments.

Flora Neomexicana III by Allred is a very well researched flora that has good keys and very helpful line drawings.

Weber's Colorado Flora was last updated in 2012 and thus has many outdated family and genus scientific names. It is still worth consulting.

Ackerfield's Flora of Colorado is helpful but it contains numerous errors and oddities. Click for a review.