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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 2--6(13) dm. Stem: generally ascending to erect, often glandular, generally +- purple or brown. Leaf: basal in rosette or opposite, cauline generally alternate, sessile, generally linear to lanceolate, or oblanceolate, minutely dentate to (2-)pinnately lobed, glabrous or hairy, distal often stalked-glandular. Inflorescence: heads generally radiate, 1 or in +- open clusters; involucre +- hemispheric to bell-shaped, obconic, or urn-shaped, 2--15+ mm diam; phyllaries 1 per ray flower, in 1(2) series, lanceolate to oblanceolate, generally folded completely around ray ovary, falling with fruit, generally +- hairy or scabrous, often glandular; receptacle flat to slightly convex, minutely bristly, paleae free, generally in 1 series between ray and disk flowers, or subtending +- each disk flower, phyllary-like, more scarious. Ray Flower: (0)3--27; corolla white, often aging +- pink, to yellow or proximally yellow and distally pale yellow or +- white. Disk Flower: ; Fruit: generally 2--5 mm, generally club-shaped, black; ray fruit compressed front-to-back, +- curved, beakless, glabrous or sparsely hairy, pappus 0; disk fruit +- straight, generally +- hairy, pappus 0 or of 1--32 awns, scales, or bristles.
Species In Genus: 14 species: western North America. Etymology: (George T. Lay, early 19th century English plant collector) Note: Generally self-sterile (except Layia carnosa, Layia hieracioides, sometimes Layia chrysanthemoides).
eFlora Treatment Author: Bruce G. Baldwin & Susan J. Bainbridge
Jepson Online Interchange
Key to LayiaPrevious taxon: Lasthenia platycarpha
Next taxon: Layia carnosa
Citation for this treatment: Bruce G. Baldwin & Susan J. Bainbridge 2017. Layia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=502, accessed on February 27, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 27, 2017.