COMPOSITE. 371 



* Leaves broad or narrow, but plane. 



1. C. ciiiieata, Greene, Eryth. iii. 11 (1895); Gray, Proc. Am. Acad, 

 viii. 633 (1873), uuder Aplop'ippus. Freely braucUing and spreading, 1 ft. 

 high or more, balsamic-ghitinous: leaves coriaceous, cuneate- or spat- 

 ulate-obovate, retuse, }4 iu- long more or less, resinous-punctate: heads 

 1^ in. high, in a terminal fasciculate corymb; bracts lanceolate or almost 

 linear, obtusish: rays 1 — 5, or 0: style-tips slender-subulate: achenes 

 pubescent. —In crevices of rocks of the Sierra Nevada, at middle eleva- 

 tions, from Placer Co. southward. Aug., Sept. 



2. C. arborescens, Greene, Eryth. iii. 10 (1895); Gray, Bot. Mex. 

 Bound. 79 (1859), under Linosyris, and Proc. Am. Acad. viii. 640 (1873), 

 under Bigelovia; Greene, Man. 175, under Ericameria. Erect, fastig- 

 iately branching, 3—10 ft. high, densely clothed with very narrow-linear 

 leaves IJj — 3 in. long, 1 line wide: heads in a terminal-fastigiate corymb, 

 20— 25-flowered: turbinate involucre scarcely 3 lines high; bracts lance- 

 olate, acute: rays seldom present: achenes short, apparently quadran- 

 gular, silky-pubescent. — At considerable elevations in the mountains of 

 Sonoma, Marin and Contra Costa counties, and in the middle Sierra 

 Nevada. Sept. — Dec. 



* * Leaves very narrow and sublerete; shrribs of heath-like aspect. 



3. C. ericoides, Greene, 1. c. 11; Less. Linnsea, vi. 117 (1831), under 

 Diplopappus ; H. & A. Bot. Beech. 146 (1833), under Aplopappus. Dif- 

 fusely branching, }4 — IJ2 ft. high, the branches fastigiate-corymbose, 

 very leafy throughout: leaves linear, terete, those of the branches ^ — ^ 

 in. long, deflexed, bearing in their axils very short branchlets hidden by 

 two-ranked closely imbricated shorter ones: involucres 3^4 in. high; 

 bracts tomentose-ciliolate: rays about 5, short: achenes subcylindrical, 

 striate, glabrous. — Sandy hills and beaches from Bolinas Bay southward, 

 chiefly or altogether near the sea. Aug. — Dec. 



4. C. tereti folia, Greene, 1. c. 12; Dur. & Hilg. Pac. R. Rep. v. 9, t. 7 

 (1855), under Linosyris; Gray, Proc. Am. Acad. viii. 644 (1873), under 

 Bigelovia. Rigidly and fastigiately branching: leaves 1 in. long, invo- 

 lute-filiform, thus at least in appearance terete: heads open -paniculate, 

 4 or 5 lines high; bracts narrowly oblong to broadly linear, obtuse, all- 

 but the innermost tipped with a green gland-like spot: achenes pubes- 

 cent. — Mountains along the western border of the Mohave Desert ; 

 seldom collected, and not well known. 



15. ISOCOMA., Naltall. Rather rigid tufted erect suffrutescent 

 plants, with thick slightly succulent leaves, and a corymbose terminal 

 cluster of smallish rayless heads. Bracts of several-flowered involucre 



