SUNFLOWER FAMILY. 465 



1. S. linearifolius (DC.) T. & G. Shrub 2 to 4 ft. high, with balsamic sticky 

 herbage and Btout woody branches; brauchlets more or less fastigiate, leafy 

 below, nearly naked above and bearing solitary heads; heads hemispherical, 

 l'_. to 2 in. broad, including the rays; leaves much crowded or fascicled, 

 linear, narrowed toward the base, lVi to 2 in. long, 1 to 2 lines wide; bracts 

 of the involucre in 2 or 3 rows, all nearly equaling the disk, oblong, acute, 

 greenish, the inner with broad scarious fimbriolate margins; rays 13 to 18, 

 oblong-lanceolate; disk-rlowers numerous; achenes white-silky; pappus white, 

 soft and deciduous. — (Aplopappus linearifolius DC.) 



Mountain peaks and slopes: Mt. Diablo southward to San Diego Co.; Sierra 

 Nevada. Mar.-Mav. 



82. ERICAMERIA Nutt. 



Ours low evergreen shrubs or bush-like plants with narrowly linear or terete 

 often heath-like leaves. Foliage punctuate, resin-bearing. Flowers yellow, the 

 heads in terminal corymbose or eymose clusters. Rays present or none. In- 

 volucre turbinate, its bracts chartaceous or coriaceous, regularly imbricated. 

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

 or yellowish, in age reddish. (Xante from the resemblance of the minute ever- 

 green 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.) Jepson. 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 to Los Angeles Co. 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-punctuate, 1% to 2 in. long; heads 2 14 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 Gray.) 



Higher Coast Eange 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 Mts. and Santa Barbara. Also in the Sierra 

 Nevada. Sept. -Nov. 



83. ISOCOMA Nutt. 



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

 in a terminal corymbose cluster. Involucral bracts coriaceous, closely imbri- 

 cated, the tips herbaceous, but appressed. Flowers yellow. Corolla-tube 

 slender, the throat ventricose or obliquely dilated, its segments erect or more 

 or less connivent about the style. Achenes longitudinally striate or ribbed, 

 the intervals silky-pubescent or -hirsute. Pappus of numerous unequal bristles, 

 the inner longest and often distinctly flattened. (Greek isos, equal, and 

 koma, a tuft, the florets equal, not unequal as in Lessingia.) 



1. I. veneta (H.B.K.) Greene var. arguta Tepson. Herbage with a rather 



