SUNFLOWER FAMILY. 



559 



| to If in. long, 1 to 1£ lines wide; bracts of the involucre in 2 or 

 3 rows, all nearly equaling the disk, oblong, acute, greenish, the 

 inner with broad scarious liinbriolate margins; rays 13 to 18, oblong- 

 lanceolate; disk-flowers numerous; achenes white-silky; pappus white, 

 soft and deciduous. — (Aplopappus linearifolius DC.) 



Mountain peaks and slopes: South Coast Ranges (Mt. Diablo 

 southward to San Diego Co.); Sierra Nevada. Mar. -May. 



Pyrrocoma elata Greene. Rigid perennial, with mostly radical 

 leaves; heads in an interrupted spike or narrow panicle; bracts of the 

 hemispherical involucre with squarrose green tips; achenes closely 

 costate. — Saline soils, Calistoga and San Jose. Not seen by us. 



82. ERICAMERIA Nutt. 

 Ours low evergreen shrubs or bush-like plants with narrowly 

 linear or terete often heath-like leaves. Foliage punctate, resin- 

 bearing. Flowers yellow,' the heads in terminal corymbose or cymose 

 clusters. Rays present or none. Involucre turbinate, its bracts 

 chartaceous or coriaceous, regularly imbricated. Achenes more or 

 less prismatic. Pappus-bristles slender, scabrous, dull white or yel- 

 lowish, in age reddish. (Name from the resemblance of the minute 

 evergreen leaves of the first species to Erica.) 



Leaves terete, not viscid, imbricated on the short axillary branchlets; rays 



5; coast plant 1. E. ericoides. 



Leaves narrowly linear, becoming filiform ; rays none; montane plant. . . 



2. E. arborescens. 



1. E. ericoides (Less.) Nutt. Low heather-like shrub (1 to 2 ft. 

 high) with decumbent or ascending main stems and numerous erect 

 branchlets; leaves linear-terete, 1 to 2 lines long, crowded or fascicled; 

 heads 3 to 4 lines high, numerous, corymbose-paniculate; bracts of 

 involucre tomentose-ciliolate, the inner narrowly oblong, acute, the 

 outermost lanceolate, acuminate; corolla with dilated throat; rays 

 about 5, 2 lines long; achenes cylindric, striate, glabrous; pappus 

 dull white, aging slightly brownish. — (Aplopappus ericoides H. & A.) 



Sand dunes along the coast: Bolinas Bay; San Francisco; Santa 

 Cruz and southward. Aug. -Sept. 



2. E. arborescens (Gray) Greene. Erect, with fastigiate 

 branches, 3 to 5 ft. high; leaves numerous on the branches, narrowly 

 linear, or closely revolute and becoming filiform, resinous-punctate, 

 1£ to 2 in. long; heads 2£ to 3£ lines high; bracts of the involucre 

 lanceolate, acute, 2 lines long or less; rays none or rarely present; 

 achenes canescent, somewhat quadrangular; pappus permanently dull 

 white, its bristles unequal. — (Bigelovia arborescens Grav.) 



Higher Coast Range hills, mostly from 1,000 to 2,000 ft. altitude, 

 often occurring in chaparral or chamisal: Napa, Sonoma, Marin, and 

 Contra Costa Cos., southward to the Santa Cruz Mountains. Also in 

 the Sierra Nevada. Sept. -Nov. 



83. ISOCOMA Nutt. 

 Rigid plants, somewhat woody at base, with thickish leaves. 



