Layia discoidea

D. D. Keck

Aliso 4: 106. 1958.

EndemicConservation concern
Treatment appears in FNA Volume 21. Treatment on page 267. Mentioned on page 262, 263, 266.
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Plants 3–20 cm (self-incompatible); glandular, not strongly scented. Stems not purple-streaked. Leaf-blades oblanceolate or lanceolate to linear, 2–35 mm, margins (basal leaves) lobed. Involucres cylindric or narrowly obconic to campanulate, 4–7 × 2–6+ mm. Phyllaries 0 (“involucres” formed of “paleae”). Paleae in 1 series (interpreted as constituting the involucre). Ray-florets 0. Disc-florets 5–35+; corollas 2.5–4 mm; anthers yellow to brownish. Ray cypselae 0. Disc pappi of 8–15 whitish to tawny, lanceolate to subulate, ± equal (often apically or marginally notched) scales 0.5–1.5 mm, each ± plumose or villous, not adaxially woolly. 2n = 16.


Phenology: Flowering Apr–Jun.
Habitat: Open, ± barren slopes and terraces, in chaparral, woodlands, forest, and meadows, on serpentine soils, talus
Elevation: 800–1600 m

Discussion

Of conservation concern.

Layia discoidea occurs in the South Inner Coast Ranges (Fresno and San Benito counties). Artificial hybrids with L. glandulosa are highly fertile (J. Clausen 1951).

Selected References

None.

Lower Taxa

None.
... more about "Layia discoidea"
not tailed +, rounded +  and obtuse +
yellow +  and brownish +
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 +
D. D. Keck +
decurrent +
0.2 cm2 mm <br />0.002 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lanceolate +  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 +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
woolly +  and villous +
800–1600 m +
hirsute +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, ± barren slopes and terraces, in chaparral, woodlands, forest, and meadows, on serpentine soils, talus +
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 /> (0.7 cm7 mm <br />0.007 m <br />) +
narrowly obconic;campanulate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
of 1 +  and 32 elliptic +
subulate +, setiform +, ovate +  and lance-attenuate +
Flowering Apr–Jun. +
3 +  and 27 +
alternate +  and opposite +
clavate +  and obcompressed +
flat;convex +
whitish;tawny +
8 +  and 15 +
lanceolate +  and subulate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
not purple-streaked +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Layia discoidea +
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 />) +