CPC National Collection Plant Profile

Frasera coloradensis

Photographer:
J. Locklear

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CPC National Collection Plant Profile

Frasera coloradensis


Family: 
Gentianaceae  
Common Names: 
Colorado gentian, Colorado green gentian
Author: 
(Rogers) D.M. Post
Growth Habit: 
Forb/herb
CPC Number: 
1942

Distribution
Protection
Conservation
References


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Frasera coloradensisenlarge
Photographer: J. Locklear
jlocklear1[at]unl.edu
Image Owner: Nebraska Statewide Arboretum

Frasera coloradensisenlarge
Photographer: J. Locklear
jlocklear1[at]unl.edu
Image Owner: Nebraska Statewide Arboretum


Frasera coloradensis is Not Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 
Jim Locklear contributed to this Plant Profile.

 
Frasera coloradensis


Geological activity in southeastern Colorado has exposed rock formations buried more deeply in other parts of the plains. The Greenhorn Limestone is one of them, outcropping in a scattering of gentle hills and ridges that appear barren from a distance. The unique chemistry of limestone limits the growth of many plants, but not the Colorado gentian. This beautiful wildflower flourishes on the Greenhorn, and is essentially limited to its outcroppings in this remote corner of Colorado.


Distribution & Occurrence

State Range
  Colorado
State Range of  Frasera coloradensis
Habitat
  Surfacing rock outcroppings and shallow, rocky soil derived from the Cretaceous-age Greenhorn Limestone Formation and, to a lesser extent, the calcareous Dakota Sandstone Formation. This sparsely vegetated habitat occurs within shortgrass prairie vegetation. Scattered juniper (Juniperus monosperma) is sometimes in association. Elevation 4000-5500 ft.

Distribution
  Limited to southeastern Colorado, where it occurs in Baca, Bent, Las Animas and Prowers counties, an area approximately 60 miles long and up to 25 miles wide.

Number Left
  Approximately 15-20 known occurrences (Naumann 1991).

Protection

Global Rank:  
G3
 
11/13/1997
Guide to Global Ranks
Federal Status:  
SC
 
1/19/1996
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  Colorado S2 1 2/10/1988  

Conservation, Ecology & Research

Ecological Relationships
  Appears to be a monocarpic perennial, with individuals living for several years as a rosette of foliage, and dying the following flowering (Locklear 1988). Occasionally occurs with Haplopappus (Oonopsis) engelmannii, an uncommon regional endemic (Naumann 1991).

Threats
  Inadvertent loss or alteration of naturally limited habitat.
Roadside herbicide applications.
Tolerates moderate levels of grazing, but may be vulnerable to overgrazing or grazing during reproductive season (Naumann 1991).

Current Research Summary
  Successfully propagated from seed using cold/moist stratification for 3 months (Nebraska Statewide Arboretum).

Current Management Summary
  Not Available

Research Management Needs
  Population monitoring.
Life history research.

Monitoring Efforts
  Not Available

Ex Situ Needs
  Not Available

References

Books (Single Authors)

Spackman, S.; Jennings, B.; Coles, J.; Dawson, C.; Minton, M.; Kratz, A.; Spurrier, C.; Skadelandl, T. 1997. Colorado Rare Plant Field Guide. Fort Collins, CO: Prepared for the Bureau of Land Management, the U.S. Forest Service, and the U.S. Fish & Wildlife Service by the Colorado Natural Heritage Program.

Von Bargen, E.; Coles, J.; Denham, M.; Jennings, W.; Martin, S.C.; Richards, V.; Steinkamp, M. 1997. Rare Plants of Colorado. Helena, Montana: Falcon Press. Prepared by the Colorado Native Plant Society.

Journal Articles

Locklear, J. 1988. The Colorado Gentian. Aquilegia. 12, 6: 1, 3.

Locklear, J. 1989. Plight of the Colorado gentian. Bulletin Board. 4, 1: 55.

O'Kane, S.L. 1988. Colorado's rare flora. Great Basin Naturalist. 48, 4: 434-484.

Reports

Culver, D.; March, M.; Kettler, S.; Pague, C. 1996. Natural Heritage inventory of significant animals and plants and classification of riparian plant associations; Timpas grazing district and Kim grazing association. Unpublished report to the U.S. Forest Service.

Kuhn, C.. 1988. Frasera coloradensis (Rogers) D.M. Post: The Distribution and Field Inventory of a Rare Colorado Endemic. Lawrence, KS: Natural History Research Grant Program. p.12 + appendices.

Locklear, J. 1987. Plant Conservation Activities: 1987 Annual Report. Lincoln, NE: From the Nebraska Statewide Arboretum to the Center for Plant Conservation. p.3.

Naumann, T.S. 1991. Status Report for Frasera coloradensis. Unpublished report to the U.S. Fish and Wildlife Service.


  This profile was updated on 5/25/2010
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