Lasthenia fremontii

(Torrey ex A. Gray) Greene

Man. Bot. San Francisco, 204. 1894.

Common names: Fremont’s goldfields
Endemic
Basionym: Dichaeta fremontii Torrey ex A. Gray Mem. Amer. Acad. Arts, n. s. 4: 102. 1849
Synonyms: Baeria fremontii (Torrey ex A. Gray) A. Gray
Treatment appears in FNA Volume 21. Treatment on page 345. Mentioned on page 346.

Annuals, to 35 cm. Stems erect, branched proximally, glabrous proximally, ± hairy distally. Leaves linear, 10–60 × 1–2+ mm (simple blades or single lobes), margins entire or with 1–3 pairs of linear lobes, faces glabrous or sparsely hairy. Involucres hemispheric or obconic, 4–7.5 mm. Phyllaries 8–16 (distinct), ovate, hairy. Receptacles dome-shaped, muricate, hairy. Ray-florets 6–13; laminae oblong to oval, 5–7 mm. Anther appendages linear to narrowly ovate. Cypselae black or gray, clavate, to 1.5 mm, usually scabrous, rarely glabrous; pappi usually of (3–) 4 (–5) subulate, aristate scales plus 3–5+ shorter, ± subulate scales or teeth, rarely of aristate scales only, or 0.2n = 12.


Phenology: Flowering Mar–May.
Habitat: Vernal pools and wet meadows
Elevation: 0–700 m

Discussion

Pappose and epappose plants of Lasthenia fremontii sometimes occur together. The ranges of L. fremontii and L. conjugens overlap slightly; the two species sometimes occur together.

Selected References

None.

Lower Taxa

None.
... more about "Lasthenia fremontii"
linear +  and narrowly ovate +
ovate +, obovate +  and linear +
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +, glomerate +  and corymbiform +
indeterminate +  and determinate +
Raymund Chan +  and Robert Ornduff† +
(Torrey ex A. Gray) Greene +
decurrent +
Dichaeta fremontii +
compound +  and simple +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Fremont’s goldfields +
yellow +  and orangish +
pappose +  and epappose +
gray +  and black +
4 +  and 18 +
papillate +
fertile +  and bisexual +
fertile +  and bisexual +
0–700 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Vernal pools and wet meadows +
in more or less corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
obconic;hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
oblong +  and oval +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sessile +  and petiolate +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
pinnatifid +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
papillate +
deltate +
with 1-3 pairs +  and entire +
2-carpellate +
persistent +
of 1 +  and 12+ aristate +
aristate +, truncate +, laciniate +  and fimbriate +
Flowering Mar–May. +
scarious-margined +
weakly +  and flat +
8 +  and 16 +
Man. Bot. San Francisco, +
dome--shaped +
3 +  and 5 +
aristate +  and subulate +
exalbuminous +
sprawling +, prostrate +  and decumbent +
hairy +  and glabrous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Baeria fremontii +
Lasthenia fremontii +
Lasthenia sect. Ornduffia +
species +
campanulate +
subulate +
toothed +  and entire +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
0 cm0 mm <br />0 m <br /> (35 cm350 mm <br />0.35 m <br />) +
shrub +  and subshrub +