(Ill) 



Involucre 1 -seriate, bracteolate. Receptacle 

 naked. Akenes glabrous, ribbed; pappus of 

 copious capillary bristles 2 . Flowers pale, 

 appearing before the leaves. 



1. N. PALMATA 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. DISCOIDEA Benth. Santa Cruz Mount- 

 ains. Summer. 



58, Senecio L- GROUNDSEL. 

 Superilua. yE'jualis. Involucre 1-seriate, 

 bracteolate. Pappus capillary. Flowers yellow. 



1. S. HYDBOPHILUS Nutt. Glabrous; heads 

 erect; rays few, sometimes 0; leaves almost 

 entire; the radical, large, with long petioles; 

 upper cauline leaves sessile, clasping. It 

 Berkeley. Summer. 



2. S. ABONICOIDES DC. Heads erect; ray- 

 flowers few, frequently 0; leaves repand-den- 

 ticulate; cauline variable, uppermost reduced 

 to bracts. It- Presidio. Spring. 



3. S. EURYCEPHALUS Torr. & Gray. Rays 

 elongated; leaves pinnately parted; lobes cu- 

 neate and acutely incised. 1C. San Mateo. 

 Summer. 



