Hymenothrix wislizeni A. Gray
Family: Asteraceae
Trans-Pecos thimblehead,  more...
[Hymenothrix wislizenii A. Gray]
Hymenothrix wislizeni image
Liz Makings  
Annuals, 30-70 cm. Phyllaries 8(-12), mostly linear to narrowly oblanceolate. Rays 3-8. Disc florets 15-30; corollas creamy to bright yellow, mostly 5-7 mm, lobe lengths 0.3-1 times throats; anthers yellowish. Cypselae 3-5 mm; pappus scales 1.5-6 mm. 2n = 24, 48. Flowering summer-fall. Open slopes and washes, sandy or gravelly soils; 600-1500 m; Ariz., N.Mex.; Mexico (Chihuahua, Sonora).
FNA 2006, Martin and Hutchins 1980
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Annual with erect stems 30-70 cm tall, much branched, slender stems, striate, with puberulent herbage. Leaves: Biternate or triternately parted, to 12 cm long, the divisions linear to filiform. Flowers: Numerous radiate heads on peduncles 1 cm or less; turbinate involucre, 4-5 mm high, 8 phyllaries mostly linear to narrowly oblanceolate, puberulent and scarious tipped; 3-8 yellow rays, each 3-4 mm long, shallowly 3-toothed; disc florets yellow to creamy, mostly 5-7 mm long, lobe lengths 0.3-1 times the throats, tube glandular-granuliferous. Fruits: Cypselae 3-5 mm, black, sparsely pubescent, truncate at summit and tapering to the base. Ecology: Found in sandy soils, often on open slopes or along washes from 2,000-5,000 ft (610-1524 m); flowers July-October. Distribution: AZ, NM, s TX; south to n MEX. Notes: An erect annual mostly branched near the top; with thinly divided leaves, distinguished from Hymenothrix wrightii by its yellow disc florets. Ethnobotany: Unknown Etymology: Hymenothrix comes from Greek hymen, meaning membrane and thrix, bristle, while wislizeni is named for Frederick Adolf Wislizenus (1810-1889) a botanist who traveled throughout the southwest. Synonyms: None Editor: SBuckley 2010, FSCoburn 2015
Hymenothrix wislizeni image
Ries Lindley  
Hymenothrix wislizeni image
Liz Makings  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Liz Makings  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Sue Carnahan  
Hymenothrix wislizeni image
Sue Carnahan  
Hymenothrix wislizeni image
Sue Carnahan  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Anthony Mendoza  
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image
Hymenothrix wislizeni image