Difference between revisions of "Lasthenia conjugens"
Pittonia 1: 221. 1888.
Common names: Contra Costa goldfields
EndemicConservation concern
Synonyms: Baeria fremontii var. conjugens (Greene) Ferris
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|publication year=1888 | |publication year=1888 | ||
|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 | ||
Latest revision as of 21:15, 5 November 2020
Annuals, to 40 cm. Stems erect, branched distally, glabrous or sparsely hairy. Leaves linear, 10–80 × 1–2+ mm (simple blades or single lobes), margins entire or pinnately lobed, faces glabrous. Involucres hemispheric or obconic, 6–10 mm. Phyllaries 12–18 (connate 1/4–1/2 their lengths), ± lanceolate, puberulent to glabrate. Receptacles dome-shaped or obconic, densely hairy. Ray florets 6–13; laminae oblong to oval, 5–10 mm. Anther appendages linear to ± ovate. Cypselae black or gray (reflective), clavate, to 1.5 mm, glabrous; pappi 0. 2n = 12.
Phenology: Flowering Mar–Jun.
Habitat: Vernal pools and wet meadows
Elevation: 0–100 m
Discussion
Of conservation concern.
Lasthenia conjugens often germinates under water in vernal pools; first leaves are submerged and entire; later, aerial leaves are pinnatifid.
Selected References
None.
Lower Taxa
None.