|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, perennial herb, subshrub, from taproot or +- branched caudex. Leaf: simple, alternate, entire to deeply 1--2-pinnately lobed, teeth or lobes bristle-tipped, distal reduced. Inflorescence: heads radiate [discoid], 1 or in cyme-like clusters; involucre hemispheric [obconic, bell-shaped]; phyllaries graduated in 2--8 series, proximally straw-colored, distally generally green, bristle-tipped; receptacle flat to convex, with short, triangular scales, glabrous, epaleate. Ray Flower: 8--many; corolla yellow [white, pink, blue, or purple]. Disk Flower: 10--many; corolla yellow; anther tip lanceolate; style tips triangular to linear. Fruit: elliptic, oblong, or obovoid, several- to many-ribbed, sparsely to densely hairy; pappus of many unequal bristles (ray pappus occasionally 0).
Species In Genus: 17 species: temperate western North America. Etymology: (Greek: yellow condition, describing flower heads of original sp.)
eFlora Treatment Author: David R. Morgan
Jepson Online Interchange
Key to XanthismaPrevious taxon: Wyethia reticulata
Next taxon: Xanthisma gracile
Citation for this treatment: David R. Morgan 2016. Xanthisma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=660, accessed on September 26, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on September 26, 2016.