-jhTQ ROSACEiE. Sinrtea. 



* * Petals white, hroadhj ohlong, about equalling the b-jmrtcd calyx : filaments 



scarcely exserted : carpels densely hairy : ovules 2 : floivers in loose spreadinrj 



panicles. 



3. S. discolor, Pursh. A diffuse shrub, 4 feet high or more, with grayish 

 hrowu bark, puljescent : leaves broadly ovate, obtuse or acutish, truncate at base or 

 cuneate into a slender petiole, more or less silky-tomentose beneath, nearly smooth 

 above, pinnatifidly toothed or lobed, the lobes often dentate: panicle much branched, 

 tomen'tose : calyx pubescent, the lobes oblong, obtuse, spreading. — Flora, i. 342. 



Var. ari^folia, Watson. Often tall (5 to 15 feet high): leaves 2 or 3 inches 

 long,' somewhat canescent beneath or scarcely so: panicle large and open. — .S. ariee- 

 foiia, Smith in IJees Cyc. ; Lindh Bot. Eeg. t. 1365. 



Var. dumosa, Watson. Only 1 to 3 feet high ; leaves usually small, an inch 

 Ion" or less, cuneate into a short margined petiole, often white-tomentose beneath : 

 panicle mostly smaller and less diffuse.— aS'. dumosa, Nutt. ; Torrey, Stansbury Eep. 

 387, t. 4 ; Watson, Bot. King Exp. 80. S. ariafiolia, var. discolor, Torr. & Gray, 

 FL i. 416. 



On low liills and in the valleys, mostly in the Coast Eanges, from Monterey Connty northward 

 to Fraser River., Tlie var. dumosa is found in the Sierra Nevada, in dry rocky places, at 5,000 to 

 11,000 feet altitude, and thence to Oregon, Colorado, and New Mexico ; more rarely m the Coast 

 Eanges also. Fragrant, with the odor of Sweet Birch. 



§ 2 £rect shrubs, loith twice pinnate leaves and numerous minute leaflets : stipules 

 p)resent : floivers x>erfect, large, in a leafy terminal racemose panicle. — CiiAMyE- 

 BATIARIA, Porter. 



4 S Millefolium, Torr. Stout, diffusely branched, 2 to 5 feet high, glandu- 

 lar-i'.ul descent and m.n-e or less toinentose : leaves narrowly lanceolate in outline, 

 scattered or fascicled at the ends of the branches, 1 to 3 inches long, with very nu- 

 merous (about 20) pinnaj and minute oblong obtuse leaflets (about 6 pairs) ; stipules 

 linear entire : flowers white, half an inch broad : calyx-tube turbinate ; the erect 

 acute lobes longer than the tube and nearly eciualling the orbicular petals : stamens 

 included : carpels 5, pubescent : styles elongated : ovules 6 to 8, suspended : seeds 

 over a line long. — Pacif. E. Eep. iv. 83, t. 5. 



Rare in the Sierra Nevada and the mountains eastward : ahove Owen's Lake at 10 000 feet alti- 

 tude aivAr)-, at Nohle's Pass, Shasta Co. (KcKhcrr,,), referred by oversight to Clmirmhatia , 

 ^ k^\zLl\r.\ S. Nevada {BUjdow, JVhcdcr) , ii. Utah (Mrs. Thornj.ua, Parry) ; ^Yyommg 

 Territory, Coulter. 

 ^ 3. Tall herbaceous perennial, with thrice pinnate leaves and no stipules : flowers 



direcious, smcdl, ivhite, in mimerous filiform pamcled sinkes : pedicels m fruit 



reflexed. — Aruncus. 



5 S Aruncus, Linn. (Goat's-Beard.) Smooth, branching, 3 to 5 feet high : 

 leaves laroe : leaflets thin, sparingly villous beneath, ovate to lanceolate, acuminate, 

 2 to 5 inches long, sharply and laciniately doubly toothed, the terminal ones broad- 

 est : panicle large and compound, pubescent : flowers a hue broad, nearly sessile : 

 petals spatulate^ filaments long-exserted : carpels 3 to 5, smooth, several-seeded. 



In ravines and along streams, Trinity and Shasta counties {Breicer), and northward to Alaska. 

 Also in the Alleghanies, and in N. Asia and Europe. 



§ 4 Low herbaceous perennial, woody at base, vrith simple entire leaves and no stip- 

 ules : floivers perfect, ivhite, in dense cylindrical sjnkes on scape-hke stems. 

 — Petrophytum, Xutt. 



6 S Ccespitosa, Ts^utt. Ccspitose, on rocks, with simple or branching scape- 

 like stems : leaves rosulate on the short tufted branches of the woody spreading 

 rootstock, oblanceolate or linear-spatulate, acute, silky on both sides, 2 to iL lines 

 lone ; those of the scape scattered and narrower : scape 2 to 6 inches high : flowers 



