116 ROSACES. 



obtuse or acute, the lowest entire, the upper more or less toothed or 

 lobed: leaflets 3 (rarely 5), cuneate-flabelliform, irregularly incised, the 

 broad teeth or lobes mucronulate: cymes mostly contracted and dense: 

 petals small, yellow, spatulate-oblong, scarcely equalling the calyx: 

 stamens about 10: achenes minute, whitish. Moist places in the 

 mountains. 



* * Perennials; petals obovate to linear; stamens 10, alternately long and 

 short, the filaments petaloid-dilated. 



- Cymes lax, dichotomous; bractlets large, often exceeding the calyx-lobes. 



5. P. frondosa, Greene, Erect or decumbent, 1^3 ft. high, leafy 

 throughout, viscidly hirsute and heavy -scented: radical leaves with 7 9, 

 cauline with 5 7 leaflets; these 1 2 in. long, oval or oblong, doubly 

 incised, thin and finely rugose; stipules ovate-lanceolate, coarsely incised: 

 cyme widely spreading, loose and leafy: calyx short-oampanulate, the 

 large spreading bractlets exceeding the segments, trifid at apex: stamens 

 very unequal: petals ligulate, erect or little spreading, white. Near 

 Martinez, Frank Swett. 



6. P. Californica (Ch. & Schl.), Greene. Size and habit of the last, 

 but stem less leafy, leaves mostly radical: herbage glandular-pubescent, 

 very fragrant; leaflets 11 21, the uppermost more or less confluent, the 

 lower distinct but approximate, ^ % in. long, broadly cuneiform, 

 toothed or deeply incised at the rounded apex: calyx % in. high, short- 

 campanulate; bractlets exceeding the calyx-lobes, usually 3-toothed at 

 the broad apex, the middle tooth longest: petals white, spatulate, 

 spreading or suberect. Var. elata, Greene. More slender than the 

 type, equally fragrant: leaflets deeply and incisely once or twice cleft: 

 bractlets of the calyx like the segments triangular-lanceolate, entire. 

 The type is common on wooded slopes about San Francisco and Oak- 

 land. The variety is of Napa Co., and northward. 



7. P. Kelloggii, Greene. Stems stout, ascending, or almost prostrate, 

 1 2 ft. long; herbage glandless, scentless, canescent with a sho> t dense silky 

 pubescence: leaflets 11 15, obovate, coarsely toothed, % % in. long: 

 calyx-tube cupulate; lobe, lanceolate, % in. long, equalled by the oblong 

 entire bractlets: petals pure white, spatulate oblong, ^ in. long. In 

 sandy soil at Alameda, Lake Merced, etc. 



-i H Cymes more condensed; bractlets smaller than the calyx-lobes; leaflets 

 in many pairs, deeply incised or lobed. 



8. P. teiiniloba, Greene. Stems 1 ft. high; herbage canescently villous: 

 leaflets %% i Q - lo Q g cuneate-obovate, deeply parted into 48 linear 

 lobes, or the uppermost narrower, few-lobed or linear and entire: 

 cymes compact: calyx 2 lines long; lobes linear, surpassed by the 

 oblong-spalulate white petals. Sonoma Co., Bigelow, and southward. 



