Lasthenia chrysantha

(Greene ex A. Gray) Greene

Man. Bot. San Francisco, 204. 1894.

Common names: Alkali-sink goldfields
Endemic
Basionym: Crockeria chrysantha Greene ex A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 445. 1884
Treatment appears in FNA Volume 21. Treatment on page 343. Mentioned on page 335, 337, 342.

Annuals, to 28 cm. Stems erect, branched distally, glabrous or ± hairy. Leaves linear, 10–80 × 1–2 (–3+) mm, margins entire, faces glabrous or sparsely hairy. Involucres hemispheric, 5–7 mm. Phyllaries 8–14, ± deltate (distinct tips ± deltate), glabrous but for apices. Receptacles ± conic, warty, glabrous or sparsely hairy. Ray-florets 6–10; (corollas lemon or golden yellow) laminae narrowly oblong, 6–7 mm. Anther appendages deltate or broadly ovate. Cypselae black, strongly flattened, obovoid, 2–3 mm, margins ciliate (hairs white or stramineous, stiff, blunt, curved), faces glabrous or scabrous; pappi 0.2n = 14.


Phenology: Flowering Feb–Apr.
Habitat: Vernal pools and wet alkali flats
Elevation: 0–100 m

Discussion

Lasthenia chrysantha has the narrowest ecologic range within Lasthenia sect. Hologymne and is mostly limited to alkali flats in the San Joaquin Valley.

Selected References

None.

Lower Taxa

None.
... more about "Lasthenia chrysantha"
ovate +  and deltate +
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† +
(Greene ex A. Gray) Greene +
decurrent +
Crockeria chrysantha +
compound +  and simple +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Alkali-sink goldfields +
yellow +  and orangish +
hairy +  and glabrous +
4 +  and 18 +
papillate +
obovoid +  and flattened +
fertile +  and bisexual +
fertile +  and bisexual +
0–100 m +
scabrous +, glabrous +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Vernal pools and wet alkali flats +
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 />) +
hemispheric +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sessile +  and petiolate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
10mm;80mm +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
papillate +
deltate +
2-carpellate +
persistent +
of 1 +  and 12+ aristate +
aristate +, truncate +, laciniate +  and fimbriate +
Flowering Feb–Apr. +
scarious-margined +
weakly +  and flat +
8 +  and 14 +
Man. Bot. San Francisco, +
hairy +, glabrous +  and warty +
exalbuminous +
sprawling +, prostrate +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined sect. Crockeria +
Lasthenia chrysantha +
Lasthenia sect. Hologymne +
species +
campanulate +
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 /> (28 cm280 mm <br />0.28 m <br />) +
shrub +  and subshrub +