Senecio californicus

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 426. 1838.

Illustrated
Synonyms: Senecio ammophilus Greene Senecio californicus var. ammophilus Greenman Senecio coronopus
Treatment appears in FNA Volume 20. Treatment on page 561. Mentioned on page 548, 568.

Annuals, (5–) 10–30 (–50+) cm (taprooted). Herbage glabrous or sparsely tomentose. Stems usually single (erect), sometimes 2–6 (branching from bases, arching upward). Leaves (sometimes subsucculent) evenly distributed; ± petiolate (proximal); blades linear-lanceolate to lanceolate 2–5 (–7+) × 0.5–2 (–3+) cm, bases tapered, margins subpinnatifid to dentate or subentire (mid and distal leaves sessile, bases clasping). Heads usually 3–10 (–20+) in open, cymiform arrays, sometimes borne singly (depauperate plants). Calyculi of 5–8+ lanceolate to lance-linear or filiform bractlets (0.5–3 mm, usually inconspicuous). Phyllaries ± 21 (sometimes fewer), 5–7 (–8) mm, tips black. Ray-florets ± 13; corolla laminae 8–11 mm. Cypselae hirtellous-strigose. 2n = 40.


Phenology: Flowering late winter–spring.
Habitat: Sandy, dry or drying sites, especially near coast
Elevation: 0–1200 m

Discussion

Dwarfish, subsucculent plants of Senecio californicus from near the coast have been recognized as S. ammophilus.

Selected References

None.

Lower Taxa

None.
... more about "Senecio californicus"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
cymiform +  and open +
indeterminate +  and determinate +
Theodore M. Barkley† +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
tapered +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
linear-lanceolate;lanceolate +
0.5cm;2cm +
winged;nerved;ribbed +
lanceolate;lance-linear or filiform +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
hirtellous-strigose +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Mexico +
0–1200 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy, dry or drying sites, especially near coast +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
tomentose +  and glabrous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
distributed +
cauline +  and basal +
erect;recurved +
deltate +
subpinnatifid +
dentate to pinnatifid +  and entire +
subentire +  and dentate +
2-carpellate +
persistent +
Flowering late winter–spring. +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
mostly oblong +  and lanceolate or linear +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +
2 +  and 6 +
appendaged +  and truncate +
papillate +
Senecio ammophilus +, Senecio californicus var. ammophilus +  and Senecio coronopus +
Senecio californicus +
species +
campanulate +
denticulate +  and serrate or toothed +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
shrub +  and subshrub +