Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Hymenothrix wrightii, Wright’s Thimblehead

Hymenothrix wrightii, Wright’s Thimblehead, Southwest Desert Flora Hymenothrix wrightii, Wright’s Thimblehead, Southwest Desert Flora Hymenothrix wrightii, Wright’s Thimblehead, Southwest Desert Flora    Hymenothrix wrightii, Wright’s Thimblehead, Southwest Desert Flora Hymenothrix wrightii, Wright’s Thimblehead, Southwest Desert Flora    Hymenothrix wrightii, Wright’s Thimblehead, Southwest Desert Flora

Scientific Name: Hymenothrix wrightii
Common Name: Wright’s Thimblehead
Also called: Wright's Beeflower
Family: Asteraceae, Sunflower Family
Synonyms: ( )
Status: Native
Duration: Annual, biennial or short lived perennial.
Size: To 3 feet or more.
Growth Form: Forb/herb; erect, slender, green, branching, glabrous or soft hairs.
Leaves: Green, alternate, narrow, slender; pinnately dissected into linear lobes, crowded on lower stems; leaf margins rolled under or (revolute).
Flower Color: White, pinkish, purplish corollas; disk flowers only about ½ inches wide, anthers pinkish to purple; flowers terminal in dense clusters of 1 to 5 or more on tips of purple stems; fruit is an achene.
Flowering Season: June to November, blooms summer and fall following monsoon rains.
Elevation: 4,000 to 8,000.
Habitat Preferences: Pine forests, scrub-oak, pinyon-juniper, chaparral and upper deserts, rocky slopes and roadsides, sandy and gravelly soils.
Recorded Range: Relatively rare in the southwest United States found only in AZ, CA, NM and TX. It is best represented in Arizona where it may be encountered throughout the state. New Mexico has modest populations mostly in the southern part of the state and California and Texas have fewer specimens recorded.

U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: No data available.
Threatened/Endangered Information: No data available.

Genus Information: 3 species in Hymenothrix, all in southwestern United States. All 3 species in Arizona.

Comments: The taxonomic type species for Wright’s Thimblehead is from Arizona. Wright’s Thimblehead is similar in appearance to two other species of Hymenothrix found in Arizona, Loomis’ Thimblehead, Hymenothrix Loomisii and Trans-Pecos Thimblehead Hymenothrix wislizeni. These species both have cream or yellow flowers and yellow anthers while Wright’s Thimblehead has white or pinkish corollas and pinkish anthers.

Wright's Thimblehead is named in part in honor of Charles Wright (1811-1885) who was an American botanist.

Date Profile Completed: 8/14/2012, updated: 06/30/2015; Updated, 07/25/2015
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles
The Jepson Manual, Citation: http://ucjeps.berkeley.edu/interchange/I_treat_indexes.html Tue Aug 14 06:37:15 2012
John L. Strother, FNA | Family List | FNA Vol. 21 | Asteraceae | Hymenothrix, Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico 16+ vols. New York and Oxford. (accessed 8/14/2012)
SEINet for synonyms, scientific names and recorded geographic locations, http://swbiodiversity.org/seinet/