Layia heterotricha

(de Candolle) Hooker & Arnott

Bot. Beechey Voy., 358. 1839.

EndemicConservation concern
Basionym: Madaroglossa heterotricha de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 694. 1836
Treatment appears in FNA Volume 21. Treatment on page 264. Mentioned on page 263.

Plants 13–90 cm (self-incompat-ible); glandular, strongly apple or banana-scented. Stems not purple-streaked. Leaf-blades elliptic to ovate, 10–120 mm, margins (basal leaves) entire or shallowly toothed. Involucres hemispheric, 7–12 × 6–13+ mm. Phyllaries 7–13, apices usually shorter than folded bases. Paleae in 1 series between ray and disc-florets. Ray-florets 7–13; laminae white to cream, 5–24 mm. Disc-florets 40–90+; corollas 4–7 mm; anthers yellow to brownish. Ray cypselae usually glabrous, sometimes sparsely hairy. Disc pappi 0, or (readily falling as units) of 14–20 white, ± equal bristles or setiform scales 3–6 mm, each proximally plumose, not adaxially woolly. 2n = 16.


Phenology: Flowering Apr–Jun.
Habitat: Grasslands, meadows, openings in woodlands, on clayey or sandy, sometimes ± alkaline soils
Elevation: 200–1800 m

Discussion

Of conservation concern.

Layia heterotricha occurs in the South Coast Ranges, western Transverse Ranges, and Tehachapi Range. Molecular phylogenetic data have indicated that L. heterotricha is sister to all other members of Layia (B. G. Baldwin 1996). Weak, ± sterile artificial hybrids have been produced with other species of Layia (no natural hybrids have been reported; J. Clausen 1951).

Selected References

None.

Lower Taxa

None.
... more about "Layia heterotricha"
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 +
(de Candolle) Hooker & Arnott +
decurrent +
Madaroglossa heterotricha +
1 cm10 mm <br />0.01 m <br /> (12 cm120 mm <br />0.12 m <br />) +
elliptic +  and ovate +
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 +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
200–1800 m +
hirsute +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, meadows, openings in woodlands, on clayey or sandy, sometimes ± alkaline soils +
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 />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
white +  and cream +
0.5 cm5 mm <br />0.005 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
toothed +  and entire +
2-carpellate +
persistent +
of 1 +  and 32 elliptic +
subulate +, setiform +, ovate +  and lance-attenuate +
Flowering Apr–Jun. +
7 +  and 13 +
alternate +  and opposite +
Bot. Beechey Voy., +
hairy +  and glabrous +
clavate +  and obcompressed +
flat;convex +
setiform +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
not purple-streaked +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Layia heterotricha +
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 />) +
banana-scented +  and apple +