1907] Hall Compositae of Southern California. 201 



The typical form with several to numerous simple scape-like 

 stems 1 to 2 dm. high from a stout perennial root : leaves mainly 

 basal, oblanceolate or obovate, 2 to 6 cm. long, about 1 cm. or less 

 broad near the obtuse summit, entire or sinuate-dentate, clothed 

 with a heavy permanent white tomentum : heads commonly soli- 

 tary on the viscid-pubescent scapes which usually bear a few 

 linear bracts: rays 20 to 30 (sometimes very few or wanting), 

 linear-oblong, short, yellow or saffron : pappus-paleae toothed. 



Mono Craters, Brewer, no. 1824, and Soda Springs of the San 

 Joaquin, Congdon, south to Southern California whence the fol- 

 lowing collections, all from the Transition Zone: Frazier Mt.. 

 Ventura Co., Hall, no. 6598 ; San Bernardino Mts., Grinnell, no. 

 14, and Parish, nos. 1833, 3380. Like the other species of Hulsea, 

 H. vestita grows only in loose gravelly soil. 



Var. pygmaea Gray, Syn. Fl. i. pt. 2, 343 (1884). Much 

 depressed, the heads sessile or subsessile in the tuft of basal 

 leaves: rays perhaps always saffron. In the Canadian, Hud- 

 sonian, and Alpine zones of San Gorgonio and neighboring peaks 

 of the San Bernardino Mts. ; also on Mt. Whitney and perhaps 

 elsewhere in the High Sierra Nevadas. A series gathered at 

 many places in the San Bernardino Mts. shows the variation to 

 be gradual and strictly altitudinal. Subsessile and long-pedunc- 

 ulate heads sometimes occur on the same plant. 



Var. callicarpha Hall, Univ. Calif. Pub. Botany i. 129 (1902). 

 H. callicarpha Wats., in Gray, Syn. Fl. i. pt. 2, 342 (1884), as 

 synonym. EL CAPAROSSA. Stems from an annual or biennial 

 root, loosely branched above; the whole plant 2 to 6 or 8 dm. 

 high: leaves mainly basal but also scattered along the branches, 

 passing above into small bracts of the elongated peduncles : rays 

 yellow, sometimes with a purplish base, 12 mm. or less long. 

 Open hillsides and beneath pines, often in sand-washes, at 1200 

 to 2700 m. alt. in the Lower Transition (and Upper Sonoran?) 

 zones of the San Jacinto, Palomar, and Cuyamaca Mts. A form 

 from the summit of Mt. Gleason, San Gabriel Range, Barber, no. 

 261 belongs here although the root is sometimes perennial. Owing 

 to the wide range of climatic and other conditions, it is not un- 

 usual for plants which are normally annual to become biennial 

 or even perennial with us. 



