II S A C E .E. 59 



calyx-tube becoming 3 — 5 lines long : tail of achene 2 in. long. — Eastern 

 slope of the Sierra, in the Mono Lake region, etc. 



2. C. betulsefolius, Hook. Jc. t. 322 (1840) ; Greene, Bull. (5alif. Acad, 

 ii. 396 (1887) : C. belidoides, Nutt. in T. &. G. Fl. i. 427 (1840) ; Greene, 

 in Garden and Forest, ii. 470 (1889) : C. parvifolius, var. glaher, Wats. 

 Bot. Calif, i. 175 (1876). Shrubby or arborescent, 6 15 ft. high, the 

 stem with a gray thin flaky bark ; branches spreading or recurved : 

 leaves somewhat coriaceous, broadly obovate with more or less cuneate 

 entire bise, but cjarsely serrate-toothed above the middle, conspicuously 

 feather-veined, glabrous above, pubescent beneath, % — 2% ^^- long : 

 calyx-tubs at length }£ iu. long : tail of achene often 3 in. long. — In the 

 Coast Range throughout the State. 



3. C. parvifolius, Nutt. in H. & A. Bot. Beech. 337 (1840). Dis- 

 tinguished from the last by the dark thick fissured and persistent bark 

 of the trunks, always bushy habit, and strictly cuneiform foliage. — A 

 Rocky Mountain species, probably reaching the eastern slope of the 

 Sierra in middle California. 



8. PURSHIA, De Candolle. Unarmed shrubs with numerous stout 

 branches and branchlets. Leaves small, crowded and fascicled, cuneiform 

 and 3-dentate, with minute 3-angular stipules. Flowers subsessile, 

 solitary or few at the ends of the short lateral leafy branchlets. Calyx 

 tubular-funnelform, persistent, 5-cleft at summit. Petals 5, obovate, 

 unguiculate. Stamens 25, perigynous in a single series. Pistil 1 (rarely 2) ; 

 style terminal ; stigma lateral, i. e., decurrent down the side of the style ; 

 ovule 1, ascending. Fruit a pubescent oblong or obovate achene. Seed 

 without albumen, but with a layer of bitter resinous matter between the 

 two integuments. 



1. P. tridentata, DO. Trans. Linn. Soc. xii. 158 (1818) ; Pursh, Fl. i. 

 333. t. 15 (1814), under Tkjarea ; Lindl. Bot. Reg. t. 1446 ; Hook. Fl. i. 

 170. t. 58. Branches strict and virgate : leaves cuneiform, % in. long, 

 plane, acutely or obtusely 3-dentate at apex, white-tomentose beneath : 

 calyx glandular : petals pale yellow, exceeding the obtuse calyx-lobes : 

 achene oblong, attenuate at each end, well exserted from the calyx. — 

 Eastern slope of the Sierra northward. 



2. P. glaiulalosa, Curran, Bull. Calif. Acad. i. 153 (1885). Of widely 

 spreading habit, the branches divaricate : leaves % in. long or less, of 

 cuneate-obovate outline, more abruptly narrowed to a distinct petiole ; 

 blade 3-lobed almost to the base, the lobes obtuse or emarginate at apex, 

 their margins closely revolute : achene obovate, scarcely exserted from 

 the calyx. — On the Mohave slope of the Kern Co. mountains. Mi-k. Curmn, 

 and eastward in Nevada. 



