206 University of California Publications in Botany. [VOL. 3 



current on the stem: disk 10 to 15 mm. broad: rays reflexed. 

 short and inconspicuous : disk-flowers red-brown : pappus-paleae 

 ovate, short-awned. 



Along streams and in meadows and wet places generally, 

 within the Upper Sonoran Zone: Lower California, Brandegee; 

 Witch Creek, San Diego Co., Alderson, ace. to Parish; Santa 

 Catalina Island, Mrs. Trash; southern base of San Bernardino 

 and San Gabriel Mts. ; thence to northern California, where it is 

 abundant near the coast. 



2. H. Bigelovii Gray, Pacif. K. Kept. iv. 107 (1857). Helen- 

 iastrum Bigelovii Ktze., 1. c. BIGELOW SNEEZEWEED. 



Branching above into several erect peduncle-like branches, 6 

 to 12 dm. high : herbage almost glabrous : leaves lanceolate, thick- 

 ish, 1 to 2.5 dm. long, conspicuously decurrent: rays showy, 

 golden-yellow, 10 to 20 mm. long : disk brownish-yellow : pappus- 

 paleae 5 to 8, ovate-lanceolate, tapering into a slender awn : 

 achenes hairy. 



Stream banks and wet meadows of the Transition Zone in the 

 San Jacinto and San Bernardino Mts. ; north to Oregon. Our 

 form differs from typical H. Bigelovii in its coarser and thicker 

 foliage which is harsh to the touch. It belongs to what Professor 

 Greene has characterized as Heleniastrum rivulare, 51 but the 

 other characters assigned to this species nature of pubescence, 

 pappus, etc. are inconstant. 



78. BLENNOSPERMA Less. 



Low annual herbs with alternate pinnately parted leaves and 

 peduncle-like branches bearing solitary yellow heads. Involucral 

 bracts equal, broadly oblong, united only at the base. Receptacle 

 naked. Heads many-flowered. Ray-flowers fertile; disk-flowers 

 perfect but sterile. Achenes obovate, not compressed or angled, 

 densely covered with minute papillae which swell up and form a 

 mucilaginous covering when moistened. Pappus none. 



1. B. Californicum (DC.) T. & G., Fl. ii. 272 (1842). Conio- 

 thele California DC., Prodr. v. 531 (1836). 



51 Greene, Fl. Fr. 435 (1897). 



