Difference between revisions of "Lasthenia burkei"
Man. Bot. San Francisco, 204. 1894.
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|publication year=1894 | |publication year=1894 | ||
|special status=Endemic;Conservation concern | |special status=Endemic;Conservation concern | ||
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Baeriinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Baeriinae | ||
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[[Category:Lasthenia sect. Ornduffia]] | [[Category:Lasthenia sect. Ornduffia]] | ||
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Latest revision as of 19:35, 6 November 2020
Annuals, to 30 cm. Stems erect, branched distally, hairy. Leaves linear, 10–50 × 1–2+ mm (simple blades or single lobes), margins entire or pinnately lobed, faces glabrous or ± hairy. Involucres hemispheric or obconic, 4–6 mm. Phyllaries 7–16 (distinct), ovate, hairy. Receptacles conic or dome-shaped, muriculate, glabrous or hairy. Ray florets 8–13; laminae oblong to oval, to 6 mm. Anther appendages linear to ± ovate. Cypselae black or gray, clavate, to 1.5 mm, hairy; pappi usually of 1(–2) aristate scales plus 3–6+ shorter, ± subulate scales. 2n = 12.
Phenology: Flowering Apr–Jun.
Habitat: Vernal pools and wet meadows
Elevation: 0–500 m
Discussion
Of conservation concern.
Lasthenia burkei is known only from relatively few populations in the coast ranges north of San Francisco Bay. It is allopatric from other members of Lasthenia sect. Ornduffia. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.