|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: Perennial herb [annual]; caudex woody, +- branched. Stem: erect [+- decumbent], unbranched [sparingly-branched distally], +- hairy. Leaf: all basal [basal and cauline], simple, entire [toothed or lobed], glabrous or +- hairy, +- gland-dotted [or not]. Inflorescence: heads radiate [discoid], 1 [in panicle-like, +- flat-topped, or tightly congested clusters]; peduncle expanded distally, +- hairy; involucre hemispheric to bell-shaped; phyllaries in 3 series, free, outer and middle similar; receptacle hemispheric to conic, pitted, epaleate. Ray Flower: corolla yellow, fading to cream, +- persistent on fruit, ray fan-shaped to oblanceolate, generally 3-lobed. Disk Flower: corolla yellow [distally +- purple]; anther tip +- triangular; style tips truncate. Fruit: obpyramidal to narrowly obpyramidal, generally 5-angled, +- hairy; pappus of membranous, generally awn-tipped scales.
Species In Genus: 9 species: western North America. Etymology: (Greek: four nerves, from ray corolla)
eFlora Treatment Author: Mark W. Bierner
Jepson Online Interchange
Previous taxon: Tetradymia tetrameres
Next taxon: Tetraneuris acaulis var. arizonica
Citation for this treatment: Mark W. Bierner 2016. Tetraneuris, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=632, 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.