Trifolium andinum
Author: Nutt.

Mountain clover

Fabaceae (Pea Family)

Close up of Trifolium andinum by Robert Dorn
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Close up of Trifolium andinum by Peggy Lyon
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Taxonomic Comments

Ackerfield (2012) treats as Trifolium andinum var. andinum. The only other variety of T. andinum, var. podocephalum is only known from Nevada.

Ranks and Status

Global rank: G3
State rank: S1
Federal protection status: None
State protection status: None

[+] Description and Phenology

Trifolium andinum by Maria L. McCormick
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General description: Flowers are bicolored, banner is pale, wings and keel are pink or purple tipped.  Heads are subtended by an involucre of bracts.  Plants densely caespitose, usually less than 1 dm tall.  Numerous flowers in each head (Weber and Wittmann 2012).

Look Alikes: Not likely to be confused with other species within its range in Colorado.

Phenology: Flowers mid-May through July (Cronquist 1989, Colorado Natural Heritage Program 2012).

[+] Herbarium Photos

Images of Trifolium andinum housed at the Colorado State University Herbarium.

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[+] Habitat

Habitat of Trifolium andinum by Peggy Lyon
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In dry sandy loam washes and exposed ridges and rocky hills in Pinus-Cercocarpus woodlands (O'Kane 1986, Cronquist 1989). Also found in sagebrush, mixed shrub, and pondersoa pine communities (Goodrich and Neese 1986, Spackman et al. 1997).

Elevation Range: 5,085 - 7,267 feet (1,550 - 2,215 meters)

[+] Distribution

Distribution of Trifolium andinum in Colorado according to mapped land ownership/management boundaries (CNHP 2012, COMaP v9 ).
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Distribution of Trifolium andinum in Colorado
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Colorado endemic: No
Global range: This species is known from Wyoming, Utah, Colorado, Arizona, New Mexico, and Nevada (USDA NRCS 2012). Variety andinum occurs in the first 5 states, while variety podocephalum is known only from Nevada (USDA NRCS 2012).
State range: In Colorado this species is known from Moffat County.

[+] Threats and Management Issues

No threats currently noted in Colorado occurrences.

[+] References

    • Ackerfield, J. 2012. The Flora of Colorado. Colorado State University Herbarium. 433 pp.
    • Colorado Natural Heritage Program. 2012. Biodiversity Tracking and Conservation System. Colorado State University, Fort Collins, CO.
    • Cronquist A. 1989. Intermountain Flora Vascular Plants of the Intermountain West, USA. Vol. 3, Part B. New York Botanical Garden, Bronx, NY.
    • Goodrich, S. and E. Neese. 1986. Uinta Basin Flora. U.S.D.A. Forest Service, Ogden, UT.
    • Heil, K.D., S.L. O'Kane Jr., L.M. Reeves, and A. Clifford, 2013. Flora of the Four Corners Region, Vascular Plants of the San Juan River Drainage; Arizona, Colorado, New Mexico, and Utah. Missouri Botanical Garden Press, St. Louis, Missouri. 1098 pp.
    • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
    • Kearney, T.H., R.H. Peebles, and collaborators. 1951. Arizona flora. 2nd edition with Supplement (1960) by J.T. Howell, E. McClintock, and collaborators. Univ. California Press, Berkeley. 1085 pp.
    • Lavender, A.E., M.M. Fink, S.E. Linn, D.M. Theobald. 2011. Colorado Ownership, Management, and Protection v9 Database. Colorado Natural Heritage Program and Geospatial Centroid, Colorado State University, Fort Collins, CO. (30 September).
    • O'Kane, S.L. 1986. Plant species of special concern for the State of Colorado. Unpublished report.
    • Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado rare plant field guide. Prepared for Bureau of Land Management, U.S. Forest Service and U.S. Fish and Wildlife Service by Colorado Natural Heritage Program.
    • USDA, NRCS. 2013. The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA.
    • Weber, W. A. and R. C. Wittmann. 2012. Colorado Flora, Western Slope, A Field Guide to the Vascular Plants, Fourth Edition. Boulder, Colorado. 532 pp.
    • Welsh, S.L., N.D. Atwood, L.C. Higgins and S. Goodrich. 1987. Utah Flora, Great Basin Naturalist Memoirs, No. 9. Brigham Young University, Provo, Utah. 986 pp.

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