ASTERACEAE. 387 



1. D. fasciculata (DC.) Greene. Hirsute or hispid below, gla- 

 brous, and viscid-glandular above, 2-5 dm. high; heads small, sub- 

 sessile, usually fasciculate-clustered; involucral bracts glabrous or 

 glandular-hispidulous; bracts of the receptacle slightly united; 

 pappus of the disk-achenes of 6-10 linear paleae. {Hemizonia 

 fasciculata T. & G.) 



Very common and general on the plains and lower hills. June- 

 September. 



2. D. wrightii (Gray) Greene. Slender, diffusely and widely 

 branching; the filiform branchlets terminating in a single head; 

 lower leaves laciniate-pinnatifid; pappus of disk-achenes composed 

 of 8-9 firm distinct paleae, laciniate at apex. 



Frequent in the interior valleys beyond our range. San Ber- 

 nardino; Riverside; Elsinore. It has also been reported from 

 Catalina Island. 



3. D. kelloggii Greene. Closely resembling the last in habit; 

 heads solitary, terminating the slender paniculate branches; pappus 

 of the tubular flowers united to near the lacerate summit. 



Apparently rare in southern California; known only from near 

 Pasadena, where it was recently collected in an old field by Joseph 

 Grinnell. 



40. CALYCADENIA DC. 



Erect virgate or diffusely branching, more or less hir- 

 sute or hispid annuals, with narrowly linear entire 

 leaves, all but the lowest alternate. Floral leaves usu- 

 ally subulate and often ending In a saucer-shaped gland. 

 Receptacle flat, the chaff herbaceous and only enclosing 

 the disk-flowers. Ray-flowers 1-vS, w^hlte or yellow, 

 vespertine, palmately 3-lobed or parted. Ray-achenes 

 obovold-trlangular, the terminal areola low, nearly cen- 

 tral. Disk-achenes turblnate-quadrangular, the outer 

 fertile. Pappus chaffy. 



1. C. tenella (Nutt.) T. & G. Slender, paniculately diffusely 

 branched above, 1-5 _ dm. high, sparsely hirsute-pubescent; the 

 filiform branchlets minutely viscid-glandular; leaves almost fili- 

 form, the margins involute, destitute of glands; heads scattered; 

 involucre cylindraceous-campanulate; ray-flowers 3-5, 3-parted to 

 the slender tube, white or often tinged with rose; ray-achenes rugose, 

 short-stipitate and abruptly rostellate-apiculate; disk-flowers 5, 

 white, cleft into oblong-linear lobes; their pappus of 4-5 lanceolate 

 paleae tapering into stout rough awns and as many intermediate 

 short lanceolate truncate ones. {Hemizonia tenella Gray.) 



Common on dry barren places in our interior valleys and in open 

 places in the chaparral belt. June-August. 



41. HARPAECARPUS Nutt. 

 Small slender viscld-glandular sweet-scented annuals 

 with entire narrow mostly alternate leaves, and numer- 



