(95) 



3. W. ANGUSTIFOLIA Niitt. P;ippus aristate. 

 Marin County. Spring. 



27. Helianthella Ton-. & Gray. 



Frustranea. Head go -flowered. Receptacle 

 flat; paleaceous. Akenes flattened; pappus 

 represented by 2, marginal, aristae, alternating 

 with 2, caducous palese. — U- Flowers yellow. 



1. H. Californica Gray. — Napa. Spring. 



28. Helianthus L. Sunflower. 



Frustranea. Head co-flowered. Receptacle 

 flat, paleaceous. Akenes slightly compressed; 

 quadrangular. Pappus represented by 2, mar- 

 ginal caducous; palese with minute, intermedi- 

 ate ones. Ray -flowers yellow. 



1. H. AXNUUS L. Receptacle flat; pale^e of 

 receptacle 3-cleft; disc brown; lower leaves 

 cordate, serrate. — Common. Summer. 



2. H. SCABERRIMUS Benth. Receptacle flat; 

 pale^e of receptacle entire, aristate, the awn 

 as long as the disc-flowers; disc brown. 0. 

 San Rafael. Summer. 



3. H. ExiLis Gray. Receptacle flat; paleae 

 of receptacle entire, aristate, the awn longer 

 than the disc-flowers; disc brown. — 0. Lake 

 county. Summer. 



