SUNFLOWER FAMILY 433 
Heads ab (ab = ag ere mostly 8-12 mm. high, the dry disk-corollas mostly 7-10 mm. long, the 
3.5-6 ; heads ls 3-30; species of northern cismontane reo doe 
42. S. eurycephalus. 
Heads for, a the involucre mostly 4-8(9) mm. hich, the dry disk-corollas mostly 4.5— 7. cae long, the 
es 2-3.5(4) mm. long; heads sein tim ore numerous; transmontane species, extending west 
‘aout thern and northeastern California. 43. S. muitilobatu 
aa VIII. Jacopakae. 
A single species in our range. 44. S. jacobaea. 
IX. ANNUvI. 
Rays = ta ae and conspicuou 45. S. californicus. 
Rays v short and inconspicuous, 
Bra ee well developed, pea ol oa tipped; rays wanting; involucral bracts Stenlpa bit 21; intro- 
uced weed. “ 
Bertones. few and inconspicuous, eH mesic -tipped, or wanting; rays present but ute Tad en ae 
n S. mohavensts sometimes wanting; involucral bracts commonly about 3 a about 13. 
Lavalustal bracts mostly about 1 
eaves coarsely dentate, eee clasping by a broad base; herbage glabrous; native ci species. 
47. 
’S. mohavens 
Leaves more or less pinn natifid, not notably expanded at the base; ae more or less ie. 
pube i introduced weed. . S. sylvaticu. 
Involucral bracts mostly about 8; nae es glabrous or nearly so; native species of the So otk Coast 
Ranges of California and adjacent islands. 49. S. aphanactis, 
, uted X. MIKANIOIDEAE, : 
A single species in our range, 50. S. mtkanioides. 
1. Senecio lyénii A. Gray. Island Butterweed. Fig. 5742. 
Senecio lyontt A. Gray, Syn. Fl. N. Amer. ed. 2. 1°: 454. 1886. 
Taprooted perennial with numerous woody stems arising from the base, commonly 3-12 dm 
tall and eine back only part way to the ground each year; stems and leaves thinly tomentulose 
e si noe Rte! soon as aa or subglabrate except for the ie guest dense tufts o 
i 4-12 cm. lo i 
nh 
per. the Vv = 
(especially the larger ones) bip nati Baie er blunt, narrow, and often s rags more or less 
linear segments ; heads vera in.a6 ins inflorescence, the dis 15 mm. wide; eae 
5-7 mm. high, i principal aoe: “mostly about 21; bracteoles Sonkpiinodd few. short; rays 
about 1 cm. long or les 5 Ca 
Ocean bluffs, pista sit pee aaa of the coast of southern California and adjacent Lower California. 
Type locality; San Clemente Island. March- ~Jun 
2. Senecio douglasii DC. Shrubby Butterweed. Fig. 5743. 
psong douglasit DC. Prod. 6: ne 1837. 
necto regiomontanus DC. loc. 
pee douglasti var. tularensis “aan Aliso 4: 99. 1958. 
Taprooted perennial with numerous woody stems arising from the base, commonly 0.5~2 m 
tall he ame back only part way to the ground each year; leaves, young twigs, and often also the 
involu ucres to mentulose at first, often eventually (rarely early) more or less glabrate. Leaves 
ng the st ear, 4-l2¢ 
rm inflor ti the di 
voluc 1m heh: the Abcipal trace usually about 21, rarely only 13; 
bracteole eel degcloped:  eodiel: _ generally some o 7 i rage half as long as the involucre 
r longer ; rays showy, about 1-1.5 cm. lon cibiek chs 
d plains, are ties cismontane Paes! from the lower slopes of the 
Sie Dr sag 4 te ff bate ap ges ett to Nay a and San Mateo Counties, south t Aged ee of ep aah 
Califorsis and adjacent Lower California; passing into t — € var. monoensis on the desert or basin side of its range 
in ae ren ceptors Type locality: sutania. ‘a 
sii var. monoénsis (Greene) teen. a Fl. Pl. Calif. 1149. 1925. (Senecio monoensis 
Green tee t et Obs. 1: 221. 1906.) os glabrous or ry rarely a Ted pele ira Da ya a little 
ai 
zz 
| 
sanniies’ more slender, and less shrubby than the typical form of the species, often dying back t ae ound each 
year. Leaves aver. aging a bs ttle — dissected and “Gractevtes averaging a little nthe: than in Fon douglasti. 
Southern Great Basin from southw n Utah to the White Mountains of Mono County, California, ‘and south- 
ward into northern tealieg and Tooeee cattordia: Mexico. Type locality: White Mountains. March-May, and 
sometimes again in the fall. 
3. Senecio blochmaniae Greene. Blochman’s Butterweed. Fig. 5744. 
Senecio blochmaniae Greene, Erythea 1: 7. 1893. 
Perennial with numerous woody stems arising from the base, 4-12 dm. tall, apparently not 
dying back to the as each year; herbage glabrous or with. inconspi uous evanes 
to s numerous, well distributed along the stems, linear-filiform, entire, commonly 
3-8 cm. long and about 84 * less, the lower ones dryi pais on ee branches ; 
eads several or rather ifor yeas agin the wide ; in- 
volucre 7-10 mm high, the principal ‘bracts mostly about 13; bra Sele aa and Bron. incon- 
spicuous ; rays abou t 1 cm. long or less; achenes aly canescent. 
and dunes and flood Sethi near me ane EE cide Sonoran Zone; Santa Barbara and San Luis Obispo Coun- 
ties, California: Type locality: Santa Maria River, San Louis Obispo "County. June—Oct. 
