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|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, < 70 (200) cm; sap milky. Stem: generally +- branched, generally erect, generally glabrous. Leaf: generally basal and cauline, alternate, sessile, sometimes reduced distally on stem, entire, toothed, or +- deeply pinnately lobed or divided. Inflorescence: heads liguliflorous; involucre generally bell-shaped; phyllaries in 3--6 series, mid-stripe green or +- red; receptacle flat to convex, shallowly pitted, glabrous or with fragile, smooth bristles < 5 mm, epaleate. Flower: corolla yellow or white, readily withering; ligules of outermost flowers exserted 1--15 mm, generally +- red- or purple-striped abaxially. Fruit: 0.9--4 mm, +- fusiform, tip truncate, generally smooth; ribs 15 (5 generally prominent, 10 +- obscure), generally extending to tip; outer pappus 0 or of teeth < 0.5 mm, or rounded-toothed crown, and 0--6 smooth, persistent bristles, inner pappus of 12--32 bristles fused at base, readily deciduous, minutely barbed proximally.
Species In Genus: 20 species: western North America, southern South America. Etymology: (Greek: soft hair) Note: Anisocoma, Atrichoseris, and Calycoseris perhaps best placed here (Lee et al. 2003 Syst Bot 28:616--626).
eFlora Treatment Author: W.S. Davis
Jepson Online Interchange
Key to MalacothrixPrevious taxon: Madia subspicata
Next taxon: Malacothrix californica
Citation for this treatment: W.S. Davis 2017. Malacothrix, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=518, accessed on March 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 24, 2017.