|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 to perennial herb, 5--150 cm. Stem: erect, unbranched or branched, green to +- red-purple, glabrous or +- hairy. Leaf: basal and cauline, alternate, simple, entire or 1--2-pinnately lobed or divided, ultimate margins entire or toothed, glabrous or hairy, +- gland-dotted. Inflorescence: heads radiate [discoid], 1 or in panicle-like or +- flat-topped clusters; peduncle expanded distally, glabrous or +- hairy; disk +- hemispheric to spheric, bell-shaped or urn-shaped; involucre +- rotate; phyllaries in 2 series, generally unequal, outer basally fused, inner free; receptacle conic to ovoid, hemispheric or +- spheric [flat], pitted, epaleate. Ray Flower: 8--26[34+], pistillate; corolla generally yellow or yellow-orange to orange, ray fan-shaped, 3(5)-lobed. Disk Flower: 25--150(400+), bisexual [6--15, staminate]; corolla yellow; anther tip triangular; style tips truncate. Fruit: +- narrowly obpyramidal [obconic], generally 5-angled, glabrous or hairy; pappus of generally obovate, generally awn-tipped scales .
Species In Genus: 25 species: western North America, South America. Etymology: (Greek: sharp membrane, from pappus) Note: Hymenoxys acaulis moved to Tetraneuris.
eFlora Treatment Author: Mark W. Bierner
Jepson Online Interchange
Key to HymenoxysPrevious taxon: Hymenothrix wrightii
Next taxon: Hymenoxys cooperi
Citation for this treatment: Mark W. Bierner 2016. Hymenoxys, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=483, accessed on May 01, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 01, 2016.