Townsendia strigosa
Author: Nutt.


Strigose Easter-daisy


Asteraceae (Sunflower Family)

Close up of Townsendia strigosa by Robert Dorn
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Ranks and Status

Global rank: G4
State rank: S1
Federal protection status: BLM Sensitive
State protection status: None

[+] Description and Phenology

Townsendia strigosa: artwork forthcoming

General description:

Look Alikes: Townsendia strigosa is distinguished from T. incana by its annual or biennial taproot, withered basal leaves, and green stems. Townsendia incana is perennial, without persistent basal leaves, and white stems (Weber and Wittmann 2012).

Phenology: Flowers May through June (Colorado Natural Heritage Program 2012).

[+] Herbarium Photos

Images of Townsendia strigosa housed at the Colorado State University Herbarium.

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[+] Habitat

Habitat of Townsendia strigosa by Peggy Lyon
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Townsendia strigosa is found in sandy or clay soil of dry, open places (Ackerfield 2012). Associated taxa include Atriplex, Artemisia, Allium, Stenotus acaulis, Phlox multiflora, Petrophyton caespitosum, Astragalus spatulatus, Tetraneuris acaulis, and Physaria subumbellata (Colorado Natural Heritage Program 2012).


Elevation Range: 5,000 - 9,000 feet (1,524 - 2,743 meters)

[+] Distribution

Distribution of Townsendia strigosa in Colorado according to mapped land ownership/management boundaries (CNHP 2012, COMaP v9 ).
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Distribution of Townsendia strigosa in Colorado
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Colorado endemic: No
Global range: In Utah, known from Daggett, Duchesne, and Uintah Counties (Welsh, 1993). In the centralwestern, southwestern, and southcentral portions of Wyoming (Dorn, 1988). In Colorado, only occurring in Moffat County (Webster, 1996).
State range: Known from Mesa, Moffat, Delta, and Montrose counties in Colorado (Ackerfield 2012). The Colorado Natural Heritage Program (2012) has records from Mesa and Moffat counties. The PLANTS database (USDA NRCS 2012) shows Moffat and Montrose counties. The University of Colorado Herbarium has only one specimen from Moffat County (2012). Weber and Wittmann (2012) report Moffat, Montrose, and Montezuma!

[+] Threats and Management Issues

One or more occurrence may the threatened by recreation uses and/or road maintenance activities.

[+] References

    • Ackerfield, J. 2012. The Flora of Colorado. Colorado State University Herbarium. 433 pp.
    • Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal, P. K. Holmgren. 1994. Intermountain Flora Vascular Plants of the Intermountain West, USA: Vol. 5. New York Botanical Garden, Bronx, NY.
    • Dorn, R.D. 1988. Vascular plants of Wyoming. Mountain West Publishing, Cheyenne, WY. 340 pp.
    • Flora of North America Editorial Committee, ed. (FNA). 1993+. Flora of North America North of Mexico. Oxford Univ. Press, New York, Oxford.
    • Flora of North America Editorial Committee. 2006. Flora of North America North of Mexico. Vol. 20. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford Univ. Press, New York. xxii + 666 pp.
    • Harrington, H.D. 1954. Manual of the plants of Colorado. Sage Press, Chicago. 666 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.
    • 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).
    • The Colorado Native Plant Society. 1997. Rare Plants of Colorado, second edition. Falcon Press Publishing Co.,Inc. Helena, Montana. 105pp.
    • 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, S. Goodrich, and L.C. Higgins (eds.) 1993. A Utah flora. 2nd edition. Brigham Young Univ., Provo, Utah. 986 pp.

Last Updated

2013-02-21