|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual, biennial, perennial herb, taprooted. Stem: 1--several from base, erect, openly branched distally or +- throughout. Leaf: basal and cauline, alternate; proximal petioled, pinnately or ternately dissected into 3--many narrow [wide] segments; distal reduced, sessile. Inflorescence: heads radiate, discoid, or radiant in many-headed, +- flat-topped cyme-like clusters; peduncle slender; involucre obconic to hemispheric; phyllaries in 1--3 +- equal series, free; receptacle rounded, epaleate. Ray Flower: 0 or 10--21+; ray yellow. Disk Flower: 10--80+; corolla yellow or white to cream, sometimes purple-tinged; anther tips triangular; style tips narrowly or widely triangular. Fruit: club-shaped or obpyramidal, 4--5-angled, glabrous or +- hairy; pappus 0 or of (1--)10--15 generally bristle-tipped scales.
Species In Genus: 11 species: southwestern United States, Mexico. Etymology: (Greek: membranous bristle, from pappus) Note: Species of Amauriopsis constitute a clade with Hymenothrix and are now treated here.
eFlora Treatment Author: Bruce G. Baldwin & David J. Keil
Jepson Online Interchange
Key to HymenothrixPrevious taxon: Hymenopappus filifolius var. nanus
Next taxon: Hymenothrix dissecta
Citation for this treatment: Bruce G. Baldwin & David J. Keil 2017. Hymenothrix, Revision 4, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=482, accessed on January 19, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 19, 2017.