|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: Subshrub; herbage glabrous, minutely scabrous, sessile- or stalked-glandular, long-soft-hairy, or tomentose. Stem: prostrate to erect, +- striate below, yellow-white or gray to red-brown, glabrous or variously hairy, often dotted with sessile resin glands. Leaf: alternate, sometimes clustered in axils, entire, toothed, or pinnately lobed, gland-dotted, sometimes gummy-resinous, light to dark gray-green. Inflorescence: heads discoid, in loose to tight cyme-like clusters, these borne at branch tips or in +- flat-topped or panicle-like 2° clusters; involucre obconic; phyllaries yellow-white proximally, cartilaginous, tips green; receptacle flat, epaleate. Flower: corolla yellow; tube narrowly cylindric, abruptly expanded into larger cylindric throat; lobes short, erect; style branch appendages triangular. Fruit: narrowly obconic, light tan, silky-hairy; hairs white, yellow, tan, or light red-tan; pappus of 1--2 series of white, +- yellow, or red-tan bristles +- 2 × fruit.
Species In Genus: 16 species: southwestern North America, Mexico. Etymology: (Greek: equal hair-tuft, from flowers) Note: Plants from southern San Diego Co. with pinnately lobed leaves resemble Isocoma tenuisecta Greene, not in California, but are more densely hairy.
eFlora Treatment Author: David J. Keil
Jepson Online Interchange
Key to IsocomaPrevious taxon: Ionactis alpina
Next taxon: Isocoma acradenia
Citation for this treatment: David J. Keil 2017. Isocoma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=487, accessed on April 29, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 29, 2017.