Lasthenia burkei

(Greene) Greene
Man. Bot. San Francisco, 204. 1894.
Common names: Burke’s goldfields
EndemicConservation concern
Basionym: Baeria burkei Greene Bull. Calif. Acad. Sci. 2: 151. 1887
Treatment appears in FNA Volume 21. Treatment on page 345.

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.

Lower Taxa

None.

... more about "Lasthenia burkei"
Raymund Chan +  and Robert Ornduff† +
(Greene) Greene +
Baeria burkei +
Burke’s goldfields +
0–500 m +
Vernal pools and wet meadows +
Flowering Apr–Jun. +
Man. Bot. San Francisco, +
ornduff1969b +
Endemic +  and Conservation concern +
Undefined (tribe Undefined) subtribe Eriophyllinae +
Lasthenia burkei +
Lasthenia sect. Ornduffia +
species +