452 COMPOSITAE 
45. Senecio califérnicus DC. California Butterweed. Fig. 5786. 
Aen oh dedwad DC. Prod. 6: 426. 1837. 
larior DC. loc. cit. 
Senec coronopus Nutt. Trans. Amer. Phil. Soc. II. 7: 413. 1841. 
Gre e, Bull. Calif. es ‘ee be @ 
Senecio calitaicuiias var, a haces Greenm. Ann. Mo. Bot. Gard. 2: 590. 1915. 
Taprooted annual, glabrous or 5 cies seh a 0.5-5 dm. tall, simple or branched. 
Leaves senile (or the ‘lower etic ate) and more or less clasping, subentire or more often co oreriatid 
toothed to pinnatifid or even subpinnatifid, Somnethnies broad-based as in S. mohavensis, sometim 
narrower and sass aed Hears S. aphanactis, 1-7 cm. long and up to 3.5 cm. wide; heads 
several in i itary in sm i i 
nflor ce 513. mm. wide; involuc 
m. high, the principal | bracts about 21 or sometimes only 13, usually minutely black-tipped; 
rays ell developed an nspicuous, aeenonly about 1 cm. long; achenes strigillose-canescent. 
Sandy and Pa oils, i n Zones; sand dunes along 2 ee of California from Monterey County south 
to nort tbern ae ower California, geet in dry, open, often sandy places farther inland (east to Kern and Tulare 
Counties). Type locality: California, Feb. —May 
46. Senecio vulgaris L. Common Groundsel or Old Man in the Spring. 
Fig. 5787 
Senecio enue Sp. Pl. 867. 1753. 
mple or strongly branched annual or winter annual with a more or less evident taproot; stem 
i die. tall, leafy throughout ; herbage sparsely crisp-hairy or subglabrous. Leaves coarsely and 
0 i a 2-10 cm. long and 
“9 wide 
5-8 mm. high, the principal bracts gat ghost 21, often black-tipped ; ieaetouten anes but well 
developed, evidently black-tipped; pap very copious, equaling or generally surpassing the 
corollas ; achenes strigillose- hirtelions thiefty along the a oa 
Seen in a ee soil and wa places; native oot the Old ioe rd but now widely distributed throughout 
most te the temperate zone; pe ale wast of the Cas ade Mountains and Sierra Nevada than elsewhere in our 
ea. Type tocatty: Barone. Flowering nearly the year gee un 
47. Senecio mohavénsis A. Gray. Mohave Groundsel. Fig. 5788. 
S i h sis A. Gray, Syn. Fl. N. Amer. 12: 446, 1884. 
Taprooted annual, 1.54 dm. tall, freely branched, the herbage wholly glabrous. Leaves sessile 
(or the toa chaos! subpetiolate) aad cordate-clasping, ovate to broadly oblong, 2-6 cm. long, 1-4 
. wi i oothed ; nde 
ed : mm. hig r 
few and small, not evidently black-tipped; pistillate flow with very much pa eet and incon- 
spicuous be or wanting; pappus copious; achenes still: -canescent. 
Desert washes and flats, Sonoran Zon nes; Panamint Mountains of California south to western Arizona and 
nicl. peeeary Type locality: Mojave region, California. April-May. 
48. Senecio sylvaticus L. Wood Groundsel. Fig. 5789. 
Senecio sylvaticus L. Sp. Pl. 868. 1753. 
Annual weed with a more or less evident taproot ; stem about 1.5-8 dm tall, g ee 
ubescent sp 
up to the inflorescence, leafy throughout ; herbage sparsely or moderate ly pu 
loose hairs, scarcely or not at all glan ular. Leaves all more or less pinnatifid and irregularly 
toothed, commonly 2-12 cm. long - m. wide; heads s or nume t 0 
ide ; involucre about 5-7 mm. high, the rather narrow, 1—2-nerved bracts mostly abou 
13; bracteoles inconspicuous or wanting, not blac -tip ra y much uced incon- 
spicuous, less than 2 mm. long; pappus very copious, equaling or surpassing the slender disk- 
coro 5 ak achenes strigillose-canescen t. 
taps in disturbed soil and waste places; native of E urope, introduced in parts of the United States and 
Can n our region lene confined to the area west of the Coen — in Oregon and Washington and 
weer re ae Great Valley in California. Type locality: Europe. June 
+9. Senecio aphanactis Greene. California Groundsel. Fig. 5790. 
Senecio aphanactis Greene, Pittonia 1: 220, 1888. 
Taprooted slender annual, simple or branched, 0.5-2. f dm. tall, slightly serge in the in- 
florescence, otherwise essentially glabrous. Leaves sessile, small, 1-4 cm. long and 1-12 m. wide, 
oO. oothed or (espe he 
rved; bracteo g or incon ack- ; 
ced and inconspicuous, barely or scarcely nO the papp ; gpa: copious, 
shout eq lice ee slender disk-corollas : ichinies seraste ate Bose-catesce ag: 
- ) —— places, Upper Sonoran Zone; in the California cs Ranges and on adjacent jr Esc San 
Abe y to northern Lower Pe oe Type locality: Mare Island, San Praciien Bay. Feb.—March. 
