(111) 
Involucre 1-seriate. bracteolate. Receptacle 
naked. Akenes glabrous, ribbed; pappus of 
copious capillary bristles —2¢. Flowers pale, 
appearing before the leaves. 
1. N. patmata Gray.—Taylorville. Santa 
Cruz Mountains. Spring. 
57. Arnica L. 
Superflua. Ray flowers elongate, with dis- 
tinct, but sterile anthers. Involucre 2-seri- 
ate. Pappus capillary.—2. Flowers yellow. 
1. A. piscomEA Benth.—Santa Cruz Mount- 
ains. Summer. 
58. Senecio L. Groonpszt. 
Superilua. Aiqualis. Involucre 1-seriate, 
bracteolate. Pappus capillary. Flowers yellow. 
1. §. HypRopHILUS Nutt. Glabrous; heads 
erect; rays few, sometimes 0; leaves almost 
entire; the radical, large, with long petioles; 
upper cauline leaves sessile, clasping.—2 
Berkeley. Summer. 
2. S. apontcorpes DC. Heads erect; ray- 
flowers few, frequently 0; leaves repand-den- 
ticulate; cauline variable, uppermost reduced 
to bracts.—2f. Presidio. Spring. 
3. S. BuRycEPHALUS Torr. & Gray. Rays 
elongated; leaves pinnately parted; lobes cu- 
neate and acutely incised.—2. San Mateo. 
Summer. 
