Layia leucopappa

D. D. Keck

Madroño 3: 17. 1935.

EndemicConservation concern
Treatment appears in FNA Volume 21. Treatment on page 266. Mentioned on page 263.

Plants 8–60 cm (self-incompatible); glandular, not strongly scented. Stems not purple-streaked. Leaf-blades oblong to oblanceolate, 6–50 (–80) mm, margins (basal leaves) toothed to lobed. Involucres hemispheric to depressed-hemispheric, 3.5–8 (–11) × 4–10 (–13) mm. Phyllaries 6–15, apices longer or shorter than folded bases. Paleae in 1 series between ray and disc-florets. Ray-florets 6–15; laminae white, 3–12 (–19) mm. Disc-florets 20–100+; corollas 2.5–5 mm; anthers yellow to brownish. Ray cypselae sparsely hairy. Disc pappi 10–13 white, lanceolate, acuminate, ± equal scales 2–3.5 mm, not plumose, not adaxially woolly (bases sparsely setose). 2n = 14.


Phenology: Flowering Mar–Apr.
Habitat: Grasslands, openings in chenopod scrub (historically), on sparsely-vegetated, clayey, subalkaline soils
Elevation: 100–400 m

Discussion

Of conservation concern.

Layia leucopappa occurs in the Comanche and Tejon hills (western Tehachapi Range). Populations of the southern San Joaquin Valley (south and east of Bakersfield) have been extirpated.

Selected References

None.

Lower Taxa

None.
... more about "Layia leucopappa"
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 +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (5 cm50 mm <br />0.05 m <br />) +
oblong +  and oblanceolate +
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 /> (0.5 cm5 mm <br />0.005 m <br />) +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
acuminate +  and lanceolate +
100–400 m +
hirsute +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, openings in chenopod scrub (historically), on sparsely-vegetated, clayey, subalkaline soils +
in more or less corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
hemispheric;depressed-hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
toothed +  and lobed +
2-carpellate +
persistent +
of 1 +  and 32 elliptic +
subulate +, setiform +, ovate +  and lance-attenuate +
Flowering Mar–Apr. +
6 +  and 15 +
alternate +  and opposite +
clavate +  and obcompressed +
flat;convex +
not plumose +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
not purple-streaked +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Layia leucopappa +
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 />) +