282 



ROSACEiE. 



2. P. millegrana Engelm. Stems erect or ascending, leafy up to 

 the inflorescence; leaves ternately 3-foliolate, the lower on long 

 slender petioles; leaflets cuneate-obovate or roundish, serrate towards 

 the apex, about \ in. long; stipules ovate-lanceolate, entire; flowers 

 very numerous in lax cymes; stamens about 10; achenes white. — 

 (P. rivalis var. millegrana Wats.) 



Lower San Joaquin River. 



3. P. glandulosa Lindl. Erect, 1 to 3 ft. high, glandular- 

 pubescent above; radical leaves 4 to 8 or even 15 in. long; leaflets 5 

 or 7 (or those of the uppermost leaves 3), broadly ovate or obovate 

 with cuneate base, 1 to 3 in. long; cyme lax, leafy -bracted; flowers 

 small, the pale yellow obovoid petals scarcely equaling the calyx; 

 stamens 25, in one row on the margin of the thickened disk; style 

 attached below the middle of the ovary. 



Wooded hills of the Coast Kanges: Vaca Mountains; Napa Valley 

 hills; Oakland Hills; San Francisco Peninsula. Not reported from 

 the inner Coast Ranges. Apr.-May. The var. Nevadensis Wats„ 

 occurs in the Sierras. 



4. P. multijuga Lehm. Herbage glandular; stems erect, 1 ft, 

 high, the leaves mostly at base; leaflets 17 to 23, or the terminal ones 

 more or less confluent, roundish to cuneate-obovate, sharply toothed 

 except at the very base, 5 to 6 lines long; calyx short-campanulate, 

 the bractlets entire, smaller than the lobes; petals narrowly oblong, 

 white, spreading; filaments subulate-dilated, the alternate little shorter. 



Monterey to Santa Barbara; to be expected at Santa Cruz. Very 

 doubtfully distinct from the next. 



5. P. Californica (C. & S.) Greene. Stems stoutish, 1 to 2 ft. high; 

 herbage glandular-pubescent; leaves mostly radical; leaflets thickish, 

 9 to 21 (or the upper leaves with fewer leaflets), cuneate-obovate to 

 -oblong, toothed or incised at the apex, £ to 1 in. or less long; flowers 

 solitary, or commonly in dense clusters in a cymose-dichotomous 

 inflorescence; calyx cup-shaped, 4 to 6 lines high, about equaling the 

 spatulate petals; bractlets exceeding the sepals, sometimes 3-toothed 

 at the broad apex. — (Horkelia Californica C. & S.) 



AVooded slopes of the San Francisco Peninsula and the Oakland 

 Hills. 



Var. Carmeliana. Stems slender, If to 2£ ft. high, leafy; leaflets 

 9 to 17, thin, ovate, incised-serrate, mostly about £ in. long; calyx- 

 tube becoming purplish in age. — Carmel River, Jepson, Aug. 1896; 

 a form as to habit intermediate between P. Californica on the one 

 hand, and P. elata and P. tenuiloba on the other. 



The following is a closely allied species not seen by us: — P. fron- 

 ix isa Greene. Erect or decumbent, 1£ to 3 ft. high, leafy through- 

 out, viscidly hirsute and heavy scented; leaflets 5 to 9, doubly incised; 

 stipules ovate-lanceolate, coarsely incised; cyme widely spreading, 

 loose and leafy; calyx short-campanulate, the spreading bractlets 

 exceeding the calyx-lobes, 3-toothed at apex; petals ligulate; stamens 

 very unequal.— Near Martinez and Santa Cruz. 



