Layia hieracioides

(de Candolle) Hooker & Arnott

Bot. Beechey Voy., 358. 1839.

Endemic
Basionym: Madaroglossa hieracioides de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 694. 1836
Synonyms: Layia paniculata D. D. Keck
Treatment appears in FNA Volume 21. Treatment on page 268. Mentioned on page 263, 264.

Plants 5–130 cm (self-compatible); glandular, usually strongly sweet or pungent-scented. Stems purple-streaked. Leaf-blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed. Involucres ± ellipsoid to obconic, 4–9 × 4–9+ mm. Phyllaries 6–16, apices shorter than folded bases. Paleae in 1 series between ray and disc-florets. Ray-florets 6–16; laminae yellow, 1–4 mm. Disc-florets 9–80; corollas 2.5–4.5 mm; anthers ± dark purple. Ray cypselae glabrous. Disc pappi of 10–16 white to rufous or purplish, ± equal bristles or setiform scales 2–4 mm, each proximally plumose, not adaxially woolly. 2n = 16, 32.


Phenology: Flowering Apr–Jul.
Habitat: Open, often grassy, or semishady sites in chaparral, woodlands, forests, and coastal scrub, often sandy soils, disturbed sites
Elevation: 0–1200 m

Discussion

Layia hieracioides occurs in the southern San Francisco Bay area, South Coast Ranges, and Western Transverse Ranges. Diploids and tetraploids are morphologically similar and reportedly geographically distinct, with diploids documented from the San Francisco Bay area and tetraploids (= L. paniculata) documented to the south. Natural, ± sterile hybrids between tetraploid plants and L. glandulosa have been documented from the Central Coast (B. D. Tanowitz and J. W. Adams 1986; R. F. Hoover 8369, UC).

Selected References

None.

Lower Taxa

None.
... more about "Layia hieracioides"
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) Hooker & Arnott +
decurrent +
Madaroglossa hieracioides +
0.7 cm7 mm <br />0.007 m <br /> (15 cm150 mm <br />0.15 m <br />) +
oblanceolate +, linear +, lanceolate +  and elliptic +
compound +  and simple +
linear to linear-elliptic +
1-2-pinnatifid;oblanceolate;linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
yellow +, bicolored +, white +  and cream +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
0–1200 m +
hirsute +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, often grassy, or semishady sites in chaparral, woodlands, forests, and coastal scrub, often sandy soils, disturbed sites +
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 /> (0.9 cm9 mm <br />0.009 m <br />) +
less ellipsoid;obconic +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
lobed +  and toothed +
2-carpellate +
persistent +
of 1 +  and 32 elliptic +
subulate +, setiform +, ovate +  and lance-attenuate +
Flowering Apr–Jul. +
6 +  and 16 +
alternate +  and opposite +
Bot. Beechey Voy., +
clavate +  and obcompressed +
flat;convex +
plumose +  and setiform +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
exalbuminous +
purple-streaked +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Layia paniculata +
Layia hieracioides +
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 />) +
pungent-scented +