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with several populations known (as of 2017) to occur on greywacke and chert outcrop and talus at the edge of the New Idria
Serpentine Mass near Condon Peak, Sampson Peak, and Idria Reservoir. Typical habitat of the species is serpentine rock outcrop, serpentine talus, and serpentine stream terraces
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occasionally display ray florets that are light yellow in color (see
Calphotos and ). Individuals bearing ray florets have been observed in populations at the New Idria, Laguna Mountain, and Panther Peak serpentine masses. It is unclear if the ray florets are a result of hybridization with nearby
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This is an annual herb growing a small glandular stem to a maximum height of about 20 centimeters. The thin leaves are generally lance-shaped, but the larger leaves on the lower part of the stem are usually lobed. Unlike other
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where it grows in full sun with little to no competition from other plant species. The shale and chert outcrop habitat that a few populations of
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grows on has similar (analogous) physical and microclimate conditions as the serpentine habitat that the species is primarily found growing.
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Gottlieb, L. D., S. I. Warwick and V. S. Ford. (1985). Morphological and electrophoretic divergence between
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Harrison SP. 2013. Plant and Animal
Endemism in California. University of California Press.
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is a cluster of many deep yellow disc florets with a base of bractlike scales. The fruit is an
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Genetic analysis performed on this species suggest that it evolved directly from
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species, which are known for their prominent white or yellow ray florets,
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is a local serpentine endemic where it is known only from the
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Baldwin, B. G. (2005). Origin of the serpentine-endemic herb
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Natural history of the
California chaparral and woodlands
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221:is a rare species of flowering plant in the family
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256:. The known distribution of the species is the
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342:looks quite different from the white-rayed
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361:typically have deep yellow ray florets.
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330:in what may be an example of both
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742:urn:lsid:ipni.org:names:136435-2
357:populations within the range of
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804:NatureServe imperiled species
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814:Endemic flora of California
300:has no ray florets or real
265:Clear Creek Management Area
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391:"NatureServe Explorer 2.0"
16:Species of flowering plant
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312:with a short scaly brown
225:known by the common name
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70:Scientific classification
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271:is regarded as a strict
464:Jepson Manual Treatment
336:peripatric speciation
332:allopatric speciation
407:from the widespread
469:USDA Plants Profile
42:Conservation status
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698:Open Tree of Life
485:Taxon identifiers
436:Systematic Botany
250:San Benito County
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183:L. discoidea
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327:Layia glandulosa
252:and far western
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672:NatureServe
620:iNaturalist
517:Wikispecies
306:flower head
287:Description
113:Angiosperms
60:NatureServe
798:Categories
711:Plant List
531:Calflora:
377:References
320:Speciation
302:phyllaries
273:serpentine
263:mass (BLM
261:serpentine
223:Asteraceae
159:Asteraceae
56:Imperiled
716:gcc-22415
586:250067061
414:Evolution
258:New Idria
177:Species:
149:Asterales
83:Kingdom:
750:Tropicos
677:2.130179
651:11454084
638:136435-2
508:Q6505563
502:Wikidata
155:Family:
139:Asterids
126:Eudicots
781:1088246
755:2704334
599:5392989
348:hybrids
276:endemic
165:Genus:
145:Order:
87:Plantae
58: (
724:PLANTS
703:509074
690:349394
612:464816
573:400442
314:pappus
310:achene
304:. The
809:Layia
776:WoRMS
729:LADI4
664:37860
646:IRMNG
625:77650
547:3SNXV
294:Layia
229:, or
170:Layia
133:Clade
120:Clade
107:Clade
94:Clade
737:POWO
685:NCBI
659:ITIS
633:IPNI
607:GRIN
594:GBIF
555:CNPS
534:4637
430:and
334:and
208:Keck
763:WFO
581:FNA
568:EoL
560:961
542:CoL
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
