418 COMPOSITE, 



under Madia. Clothed with long almost hispid hairs, and a short little 

 more than scabrous indumeut, a few gland-tipi^ed hairs of intermediate 

 length interspersed: stem 1 — 2 ft. high: lowest leaves in opposite rather 

 remote pairs, oblanceolate, obtusish, not even the scattered reduced and 

 linear upper ones acute: corymbose panicle ample: rays narrow, }>^ — % 

 in. long, yellow: achenes lunate-clavate, brown dotted with black. — 

 Mountain sides and summits of the Coast Kange from Sonoma Co. to 

 Monterey. An early-flowering species. May, June. 



4. M. corymbosa, DC. 1. c; Greene, Pitt. ii. 218 (1891), under Madia. 

 More slender and less branching than the last, seldom more than a foot 

 high, and simple up to the corymbose summit; pubescence more scanty 

 and villous, with a scabrous-hispid short indument and usually abundant 

 small stalked glands: leaves all linear, the lowest in remote pairs and 

 sometimes remotely serrate : rays rather few, light-yellow, deeply 3-clef t, 

 the middle segment much narrower than the others: achenes compressed- 

 trigonous, mottled with dark and light brown. — Very common at middle 

 elevations of the Sierra on both slopes, thence northward; flowering and 

 fruiting from April to July, according to altitude; thus a truly vernal 

 species like the last. 



5. 31. polycarplia. Madia polycaipha, Greene, Pitt. iii. 167 (1897), 

 under Madia. Slender, 2 ft. high, corymbose-pauicled: herbage 

 appressed-strigulose, minutely glandular and with some setose-his- 

 pid hairs: lowest leaves opposite, oblanceolate, obtuse, entire, hispid- 

 ciliate below the middle, the reduced ones of the branches linear, ciliate 

 throughout : bracts of the involucre not glandular, only sparsely hirsute : 

 rays 8 — 10, yellow: chaff of receptacle almost wholly scarious, discon- 

 nected and in several series: ray-achenes compressed-trigonous, nearly 

 enclosed by their bracts. — Foothills of the Sierra Nevada; apparently 

 not common. 



59. HEMIZONIA, DeCandolle. Annuals, with the glandular pubes- 

 cence and vespertine rays of Madia; differing scarcely generically by 

 the thicker and rather obcompressed than laterally compressed achenes, 

 these more stipitate, smooth. Receptacle flat; chaff mostly as in Madia. 

 Flowers in the typical species white; their season summer and autumn. 



* Heads corymbose or panicled. 



1. H. coiigesta, DC. Prodr. vi. 692 (1836). Soft-hirsute but not 

 lanate, 2 ft. high, the inflorescence glandular: bracts of the involucre 

 with lanceolate foliaceous tips little surpassed by the white rays: mar- 

 ginal bracts of the receptacle lightly connate or distinct: achenes with 



