66 ROSACEiE. 



16. P. froiulosa, Greene, Pittonia, i. 300 (1889). Erect or decum]:>ent, 

 IM — 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-campanulate, the large spreading bractlets exceeding the 

 segments, tripid at apex : stamens very unequal : petals ligulate, erect 

 or little spreading, white. — A very well marked sxjecies, perhaps some- 

 what local, but plentiful near Martinez, Frank Swett ; also at Santa 

 Cruz, Parry. May, June. 



17. P. Califoruica, Greene, 1. c. 100 (1887) ; Ch. & Schl. in Linnfea, 

 ii. 26 (1827). Size and habit of the last, but stem less leafy, leaves mostly 

 radical: herbage glandular-pubescent, very fragrant: leaflets 11-21, 

 the upjjermost more or less confluent, the lower distinct but approximate : 

 leaflets I4 — ^ in. long, broadly cuneiform, toothed or deeply incised at 

 the rounded apex : cymose-dichotomous inflorescence lax : calyx }4 ^^• 

 high, short-campanulate ; bractlets exceeding the calyx-lobes and 

 3-toothed at the broad apex, the middle tooth longest : petals white, 

 spatulate, spreading or suberect. Var. elata. P. elata, Greene, 1. c. 

 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 Oakland. The variety, first described, as a species, from 

 fruiting specimens which were misleading as to the filaments, is of Napa 

 and Humboldt counties, Greene, ChesniU & Dreiv. 



18. P. multijuga, Lehm. Eevis. 29. t. 7. ? (1856); P. Lindleyi, 

 Greene, Pitt. i. 101 (1887). Horkelia cuneaia, Lindl. Bot. Reg. t. 1997 

 (1837). Erect, 1 ft. high, leafy at base only, glandular-villous and 

 fragrant : leaflets 19—25, rounded and incised above the middle, cuneate 

 at base, ^4 in. long : inflorescence distinctly terminal, though ample, at 

 summit of the slender nearly leafless stem : calyx cyathiform ; bractlets 

 entire, smaller than the lobes : petals narrowly oblong, white, spreading: 

 filaments subulate-dilated, the alternate ones little shorter. — Santa Cruz, 

 Pringle, Parry, and southward along the coast hills. Most distinct from 

 P. Californica in habit, inflorescence, calyx, etc., though confused with it 

 in the " Botany of California," as was the next. 



19. P. Kello^gii, Greene, Pittonia, i. 101 (1887), also Bull. Calif. Acad, 

 ii. 416, under Horkelia. H. Californica, var. sericea, Gray, Proc. Am. 

 Acad. vi. .529 (1868). Stems stout, ascending, or almost prostrate, 1 — 2 ft. 

 long ; herbage glandless, scentless, canescent with a short dense silky 

 pubescence : leaflets 11 — 15, obovate, coarsely toothed, % — % ^^- long : 

 calyx-tube cupulate ; lobe, lanceolate, }4 in. long, equalled by the oblong 

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



