Aster Tribe 395 



2. P. Lyoni Gray. Hirsute, at least the margins of the plane 

 linear or spatulate-linear leaves, 1-1.5 dm. high, with the sparing 

 ascending branches leafy up to the head or short peduncle ; in- 

 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. Not seen by us. The above is a 

 copy of the original description. 



6. HETEROTHECA Nutt f 



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. CHBYSOPSIS 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 



