Calibrating the data logger…
COLORADENSE StatusEriogonum coloradense (Colorado buckwheat) is known from 22 occurrences in five counties (Chaffee, Gunnison, Park, Pitkin, and Saguache) in Colorado.Sixteen or 18 occurrences are known to reside on USDA Forest Service land on the Gunnison National Forest, White River National Forest, and San Isabel National Forest.Other occurrences are known on privately-owned lands and Bureau of Land Management lands.The ownership of eight occurrences is unknown due to vague location information, and 16 occurrences have not been seen in over 20 years.It is found in a restricted area but across a broad elevation range (8,870 to 12,840 feet) associated with many different substrates and habitats.It has a somewhat bimodal distribution, with most known occurrences in alpine sites but some in grassland and open, subalpine sites as well.The total population size of E. coloradense is unknown, but current data suggest a population size of 4,700 to 5,000 individuals.The largest and best-known occurrences (and most of the known population) are found in Gunnison and Pitkin counties, with approximately half of the known population occurring in one occurrence.It is ranked globally imperiled (G2) by NatureServe and imperiled in the state (S2) by the Colorado Natural Heritage Program.Eriogonum coloradense is not included on the sensitive species list of the USDA Forest Service Region 2 (USDA Forest Service 2003), and it is not listed as threatened or endangered under the Endangered Species Act of 1973 (U.S.C. 1531-1536, 1538-1540).It is included on the sensitive species list for the Bureau of Land Management Gunnison Field Office (Bureau of Land Management 2000).There is some evidence suggesting that E. coloradense is a high elevation form of E. lonchophyllum, but there has been no rigorous investigation to verify or refute this. Primary ThreatsObservations and quantitative data have shown that there are several threats to the persistence of Eriogonum coloradense.In order of decreasing priority, these are recreation impacts, grazing and its secondary effects, right-ofway management, residential development and human population growth, exotic species invasion, effects of small population size, mining, rust, global climate change, and pollution.Some threats are more urgent at some sites than at others; thus this hierarchy of threats is different for each occurrence.
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