Layia chrysanthemoides

(de Candolle) A. Gray

Proc. Amer. Acad. Arts 7: 360. 1868.

Endemic
Basionym: Oxyura chrysanthemoides de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 693. 1836
Synonyms: Layia chrysanthemoides subsp. maritima D. D. Keck
Treatment appears in FNA Volume 21. Treatment on page 265. Mentioned on page 262, 263.

Plants 4–53 cm (self-incompatible); not glandular, not strongly scented. Stems not purple-streaked. Leaf-blades lanceolate or oblanceolate to linear, 5–120 mm, margins (basal leaves) lobed to pinnatifid. Involucres hemispheric or depressed-hemispheric, 4–12 × 4–14+ mm. Phyllaries 6–16, apices often longer (sometimes shorter) than folded bases. Paleae subtending ± all disc-florets. Ray-florets 6–16; laminae usually proximally yellow, distally white or light yellow, rarely uniformly yellow throughout, 3–18 (–24) mm. Disc-florets 28–100+; corollas 3–5 mm; anthers ± dark purple. Ray cypselae glabrous. Disc pappi 0 or of 2–18 tawny, subulate to setiform, unequal scales 1–4 mm, each ± scabrous, not adaxially woolly. 2n = 16.


Phenology: Flowering Mar–Jun.
Habitat: Grasslands, open woodlands, often valley bottoms, disturbed sites, edges of vernal pools, waterways, and salt marshes, usually on heavy soils, sometimes ± alkaline or saline
Elevation: 0–800 m

Discussion

Layia chrysanthemoides occurs from the western Great Valley to the coast in northern and central California. Molecular and morphologic data have indicated that L. chrysanthemoides is most closely related to L. fremontii (B. G. Baldwin, unpubl.); the two species are reportedly highly interfertile (natural hybrids have not been reported; J. Clausen 1951).

Selected References

None.

Lower Taxa

None.
... more about "Layia chrysanthemoides"
not tailed +, rounded +  and obtuse +
dark purple +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
umbelliform +, spiciform +, paniculiform +, glomerulate +  and corymbiform +
indeterminate +  and determinate +
Bruce G. Baldwin +, Susan J. Bainbridge +  and John L. Strother +
(de Candolle) A. Gray +
decurrent +
Oxyura chrysanthemoides +
0.5 cm5 mm <br />0.005 m <br /> (12 cm120 mm <br />0.12 m <br />) +
oblanceolate +  and linear +
compound +  and simple +
linear to linear-elliptic +
1-2-pinnatifid;oblanceolate;linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +, bicolored +, white +  and cream +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
0–800 m +
hirsute +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, open woodlands, often valley bottoms, disturbed sites, edges of vernal pools, waterways, and salt marshes, usually on heavy soils, sometimes ± alkaline or saline +
in more or less corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
depressed-hemispheric;hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
yellow +, light yellow +  and white +
0.3 cm3 mm <br />0.003 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
lobed +  and pinnatifid +
2-carpellate +
subtending +
persistent +
of 1 +  and 32 elliptic +
subulate +, setiform +, ovate +  and lance-attenuate +
Flowering Mar–Jun. +
6 +  and 16 +
alternate +  and opposite +
Proc. Amer. Acad. Arts +
clavate +  and obcompressed +
flat;convex +
2 +  and 18 +
subulate +  and setiform +
unequal +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
exalbuminous +
not purple-streaked +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Layia chrysanthemoides subsp. maritima +
Layia chrysanthemoides +
species +
cylindric +
entire +  and toothed +
60 cm600 mm <br />0.6 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
2 cm20 mm <br />0.02 m <br /> (60 cm600 mm <br />0.6 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +