Layia jonesii

A. Gray

Proc. Amer. Acad. Arts 19: 18. 1883.

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

Plants 7–55 cm (self-incompatible); glandular, not strongly scented. Stems usually purple-streaked. Leaf-blades lanceolate or oblanceolate to linear, 10–70 (–90) mm, margins (basal leaves) lobed to pinnatifid. Involucres ± broadly urceolate, 4–8 × 4–8 (–12) mm. Phyllaries 13–27, apices usually shorter, sometimes longer than folded bases. Paleae in 1 series between ray and disc-florets. Ray-florets 13–27 (in 2 series); laminae proximally yellow, distally white, 5–10 (–14) mm. Disc-florets 35–100+; corollas 3–5 mm; anthers ± dark purple. Ray cypselae glabrous. Disc pappi 0 or of 8–14 whitish, ± ovate or elliptic, ± equal scales 0.5–2 mm, not plumose, not adaxially woolly (bases sparsely setose). 2n = 14.


Phenology: Flowering Mar–May.
Habitat: Grasslands, openings in chaparral, on clay or serpentine soils
Elevation: 0–400 m

Discussion

Of conservation concern.

Layia jonesii occurs on the immediate coast from Cayucos to Morro Bay and in the Outer South Coast Ranges near San Luis Obispo. Layia jonesii is most closely related to L. leucopappa and L. munzii (B. G. Baldwin, unpubl.); the three species are interfertile (they do not co-occur; J. Clausen 1951).

Selected References

None.

Lower Taxa

None.
... more about "Layia jonesii"
not tailed +, rounded +  and obtuse +
dark purple +
pale +  and dark +
connate +  and distinct +
sometimes longer +
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 +
A. Gray +
decurrent +
7 cm70 mm <br />0.07 m <br /> (9 cm90 mm <br />0.09 m <br />) +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 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 +
not plumose +
0–400 m +
hirsute +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, openings in chaparral, on clay or serpentine 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 /> (1.2 cm12 mm <br />0.012 m <br />) +
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 /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
white +  and yellow +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
lobed +  and pinnatifid +
2-carpellate +
persistent +
of 1 +  and 32 elliptic +
subulate +, setiform +, ovate +  and lance-attenuate +
Flowering Mar–May. +
13 +  and 27 +
alternate +  and opposite +
Proc. Amer. Acad. Arts +
clavate +  and obcompressed +
flat;convex +
8 +  and 14 +
elliptic +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
exalbuminous +
Endemic +  and Conservation concern +
purple-streaked +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Layia jonesii +
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 />) +