362 ASTERACEAE. 



volucre hirsute; its bracts linear-lanceolate and of nearly equal 

 length, green, with narrow scarious margins; pappus-bristles 9-11 

 or commonly 12. 



San Pedro; Santa Catalina Island, Lyon. 



6. HETEROTHECA Nutt. 



Annual or biennial hirsute herbs, with alternate leaves 

 and a terminal corymbose panicle of middle-sized heads. 

 Involucre ovate, its bracts closely imbricated in many 

 series, without spreading tips. Flowers yellow, those of 

 the ray pistillate, of the disk perfect. Style-appendages 

 of the disk-flowers ovate or lanceolate. Achenes com- 

 pressed, pubescent, those of the ray thin-triquetrous, 

 with caducous pappus or none. Pappus of disk-achenes 

 of an outer series of sparse short bristles and an inner 

 series of copious longer ones. 



1. H. grandifolia Nutt. Annual or biennial, 1-2 m. high, hirsute, 

 the inflorescence viscid and strong-scented; stem leaves oval or 

 oblong, coarsely toothed, partly vertical by a twist in the petiole, 

 this bearing at base 2 stipuliform lobes; involucre about 1 cm. 

 high; ray-achenes without pappus; those of the disk with but faint 

 traces of the outer and shorter bristles. 



Frequent in waste places in sandy soil. June-November, or in 

 favored places flowering throughout the year. 



7. CHRYSOPSIS Ell. 



Low perennial herbs or somewhat suffrutescent, with 

 sessile usually entire leaves, and middle-sized heads ter- 

 minating corymbose or fastigiate branches. Involucre 

 ovate or broader, its bracts narrow, regularly imbricated 

 in several series. Flowers yellow. Style-appendages 

 linear-filiform to slender-subulate. Achenes compressed, 

 obovate to linear-fusiform. Pappus brownish, of many 

 capillary scabrous bristles, with or without an outer 

 series of short bristles of paleae. 



1. C. sessilifolia Nutt. Slender, sparsely pilose-hispid, viscid- 

 glandular; leaves oblanceolate, sharply pointed, the longest often 

 3-4 cm. long; corymbose branches ending in about 3 subsessile 

 heads; these about 12 mm. high, leafy-bracted at base; involucral 

 bracts viscid-glandular; achenes slender-fusiform, silky-pubescent; 

 outer pappus slenderly squamellate. 



Along the coast, Davidson. 



2. C. fastigiata Greene. Stems several, ascending, 3-6 dm. high, 

 rigid and brittle, densely clothed with small ascending, erect leaves; 

 these strongly crisped, 12 mm. long or less, sessile, acute, densely 



