.1907] HallCompositae of Southern California, 147 



upper leaves much reduced in size, linear-lanceolate : heads in a 

 corymbose panicle: receptacle convex, fimbrillate-hirsute : rays 

 12 to 15 ; the ligules 8 to 16 mm. long, yellow or with a red spot 

 at base : achenes flattish, light brown to almost black, smooth. 



Common at middle and lower altitudes in the mountains 

 (Transition and Upper Sonoran Zones), from Palomar, San 

 Diego Co., to Oregon. 



Var. hispida (DC.) Hall, comb. nov. Madaria corymbosa /?? 

 hispida DC., Prodr. v. 692 (1836). Madia hispida Greene, Pitt, 

 ii. 217 (1891). A slender form with long almost hispid spread- 

 ing hairs and nearly destitute of the black tack-shaped glands: 

 stems 3 to 6 dm. high: lower leaves opposite, in rather remote 

 pairs : rays clear yellow. Upper Sonoran Zone : Tehachapi. 

 Jun., 1899, Greene; near Fort Tejon, Kern Co., Coville & 

 Funston, no. 1172, and Hall, no. 6274: north along both the 

 Coast Ranges and the Sierra Nevada Mts. to middle California. 



4. M. exigua (Sm.) Greene, Eryth. i. 90 (1893). Sdero- 

 carpus exiguus Sm., in Rees' Cycl. xxxi. no. 3 (1816). Harpae- 

 carpus exiguus Gray, Bot. Mex. Bound, 101 (1859). Madia 

 filipes Gray, Proc. Am. Acad. viii. 391 (1872), and ix. 189 

 (1874). 



Stem slender, paniculately branched to nearly simple, the 

 whole plant commonly 1 to 2 dm. high : herbage viscid-glandular, 

 sweet-scented: leaves linear, entire: heads on naked filiform pe- 

 duncles: involucre 3 mm. high; its bracts 4 to 8, lunate and 

 strongly carinate, the free tip minute : ligules inconspicuous : 

 bracts of the receptacle united : disk-flower only one : ray-achenes 

 laterally compressed, obovate-lunate, pointed by a small disk. 



Mostly in the Lower Transition Zone; frequent at middle 

 and lower altitudes from San Diego Co. northward to British 

 Columbia. 



54. HEMIZONELLA Gray. 



Low annual herbs, hirsute throughout or the stems glabrate. 

 Leaves linear and entire, mainly opposite. Involucre of 4 or 5 

 bracts, which are broad on the back, the margins infolded for 

 their whole length and completely enclosing the obcompressed 

 incurved ray-achenes. Bracts of the receptacle united to form 



