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Last Addition: July 26, 2000. Each "thumbnail" image below is linked to a larger photograph.
Layia includes 14 annual species ranging from central Washington and Idaho to Baja California and New Mexico. Plants 2-130 cm high. Heads radiate (except L. discoidea); phyllaries (0)3-27 each generally folded around a ray ovary; receptacular chaff scales free, marginal or scattered throughout disk; ray florets pistillate, corollas white to yellow, the tubes hairy; disk florets 4-125, perfect, corollas yellow; anthers yellow or dark purple; ray cypselae obcompressed, generally more or less glabrous, epappose; disk cypselae generally club-shaped, more or less hairy, pappus various. On good years many populations provide a continuous blanket of spring color. Diploid chromosome numbers include n = 7 (six species) and n = 8 (eight species). Layia hieracioides includes both diploid (n = 8) and tetraploid (n = 16) populations.
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L. carnosa, Humboldt Dunes, near Samoa, CA. | ||||
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L. chrysanthemoides, Bear Valley, Colusa Co., CA. | ||||
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L. fremontii, near Merced, CA. | ||||
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L. gaillardioides, Moraga Hills, CA. | ||||
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L. glandulosa, white layia. The yellow-rayed form is sometimes recognized as subsp. lutea. | ||||
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L. heterotricha, Fresno Co., CA. | ||||
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L. hieracioides, 1. Santa Lucia Range, southern Monterey Co., CA. 2. Nipomo Mesa, San Luis Obispo Co., CA. | ||||
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L. pentachaeta, 1, Sierra foothills E of Merced, CA.; 2, Temblor Range, E of Carrizo Plain, CA.; 3, near McKittrick, Kern Co., CA. | ||||
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L. platyglossa, 1-3, Mt. Diablo, Contra Costa Co., CA. | ||||
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L. septentrionalis, |