Welcome to the Colorado Rare Plant Guide

Oonopsis puebloensis by Georgia Doyle
Hypoxis hirsuta by Fred Johnson
Penstemon retrorsus by Barbara Galloway
Gilia haydenii by Al Schneider
Herrickia horrida by Steve O'Kane
Asclepias stenoplylla by Fred Johnson
Physaria vitulifera x bellii by Teresa Burkert
Saussurea weberi by Susan Spackman
Unamia alba by Delia Malone
Oxybaphus rotundifolius by Marjorie Joy
Illustration of Asclepias stenoplylla by Britton and Brown 1913.

Botanical research in the state of Colorado has identified 16 plant species that are listed by the U.S. Fish and Wildlife Service (USFWS) as threatened or endangered (USFWS 2012); and over 500 plant species considered to be of special concern by the U.S. Forest Service (USFS), the Bureau of Land Management (BLM), the USFWS, and/or the Colorado Natural Heritage Program (CNHP 2014).

The Colorado Rare Plant Guide has been produced through the efforts of the Colorado Rare Plant Technical Committee, a committee representing government and private interests, and concerned with protecting Colorado's flora. The Committee anticipates that a guide to Colorado's rarest plants will facilitate the collection of botanical data, be indispensable to the establishment of conservation priorities, and enable informed land management decisions.

For further information please see: "About the Rare Plant Guide", above.

To provide input: please use the research tab to the left, or for corrections to the text, additional photographs, location information, etc. please contact Susan Panjabi at: susan.panjabi@colostate.edu.

To further support this effort please contribute via the "Donate" tab to the left, and mention the Rare Plant Guide in the comments field.

This resource should be cited as:
Colorado Natural Heritage Program. 1997+. Colorado Rare Plant Guide. www.cnhp.colostate.edu. Latest update: August 30, 2019.

This guide includes 31 species profiles developed in 2016-17, 84 species profiles developed in 2013-2014, and 173 species profiles developed in 1997. Our long-term goal is to have species profiles completed for all 500 species of concern.