OP MABINE COASTS. 103 



On dunes at San Francisco and Pacific Grove, but not confined to 

 the coast. 



Grmdelia robusta Nutt. var. maritima. 



Perennial herb, with ascending or erect stems, 3 — 4 dm. high, 

 herbage ligthly pubescent; leaves oblong, obtuse, serrulate; heads filled 

 with white gummy exudation; rays yellow. 



Sometimes on drift sand, but prefers hard ground near coast, 

 California. 



Helichrysum arenarium (L.) DC. 



Perennial herb with single stems, densely white-tomentose ; leaves 

 sessile, obtuse, the lower oblong-obovate, the upper linear-lanceolate; 

 flowers yellow. 



On dunes of Northern Germany, but also inland in certain parts of 

 Europe. 



H. cinerewm P. Muell. 



Erect, much-branched shrub, 1 — 1.5 m. high; branchlets tomentose; 

 leaves linear, obtuse, 1 — 2 cm. long, with revolute margins, glabrous 

 above, tomentose beneath, sometimes succulent. 



Common on sand dunes in Victoria. Also said to occur in New 

 South Wales and Tasmania. 



Hieracium pilosella L. and H. umbellatum L. 

 are commonly found on established dunes along the Baltic, but are 

 adventive from inland. 



Jaumea carnosa (Less.) Gray. 



Perennial glabrous herb, with many slender stems, from the fleshy 

 crown of the taproot, mostly simple, 10 — 15 cm. long, decumbent at 

 base and rooting at the nodes; leaves linear, entire, fleshy, opposite, 

 20 — 25 mm. long; flowers yellow. 



Sandy' beaches, California. 



Lessingia Germanorum Cham. 



Annual herb, low, diffusely branched, 10 — 20 cm." high; herbage with 

 appressed white tomentum, wholly glabrate in age, at least on branches; 

 lowest leaves pinnatifid, those of the branchlets scattered, linear and 

 usually entire, not gland-bearing; flowers yellow. 



Common on sand dunes of California from San Francisco south- 

 wards, but not confined to the coast. 



