ROSE FAMILY 177 



Cymes more or less corymbosely congested or the clusters subcapitate or capitate ; Sierra 

 Nevada ; Siskiyou and Trinity Cos. 

 Stems not wiry ; petioles not over % as long as rachis ; leaves sometimes terete ; sta- 

 mens 5 or 10 33. P. gordonii. 



Stems wiry; petioles Yz as long as rachis; leaves not terete; stamens 5 



34. P. webberi. 



2. Filaments dilated, at least the alternate (except in P. congesta) ; stamens 10, alternately long 



and short; calyx-tube mostly cupulate or campanulate ; petals white, rarely pinTcish 



or yellowish; leaflets 5 to numerous, ^2 to 1% inches long, often only 



2 to 6 lines long. — Subgenus Hoekelia. 



a. Bractlets ovate to narrowly lanceolate. 



Filaments opposite the sepals broadly dilated, those opposite the petals usually nearly linear. 



Calyx-tube 3 to 5V^ lines wide; leaflets doubly toothed or somewhat incised; cymes leafy; 



plants stout; mainly coast line 35. P. calif arnica. 



Calyx-tube 1 to 2% lines wide ; leaflets deeply incised ; plants slender ; montane.. ..36. P. elata. 

 Filaments all broadly dilated, those opposite the petals usually shorter and narrower (in P. con- 

 gesta usually all linear-lanceolate). 

 Pedicels erect, slender to stoutish. 



Lower stipules entire, or sometimes 2 or 3-cleft, not forming a conspicuous basal tuft. 

 Leaflets toothed or somewhat incised ; coastal except no. 40. 

 Herbage sparsely villous and more or less glandular. 



Leaflets 5 to 9, suborbicular, truncate and more or less palmately toothed 



at apex; San Diego Co 37. P. truncata. 



Leaflets 13 to 25, ovate, toothed above the base, or cuneate, usually rounded 



at apex ; coastal, San Mateo Co. to San Diego Co 38. P. lindleyi. 



Herbage usually densely pubescent, often silky, sometimes glandular. 



Pubescence rather coarse, subsilky, appressed or subappressed on leaflets, 

 sometimes coarser and spreading on stems and petioles; cymes 

 dichotomously branched, the clusters congested-corymbose to sub- 

 capitate; coastline 39. P. Tcelloggii. 



Pubescence fine, silky-tomentulose ; cymes not dichotomously branched, 



often rather open ; Lake Co. and mts. of S. Cal 40. P. bolanderi. 



Leaflets incised % way or more toward the midrib, or deeply dissected, the segments 

 oblong to linear. 

 Herbage silky-villous ; cjines more or less congested; pistils mostly 12 to 25; 



Coast Ranges 41, P. stenoloba. 



Herbage white-hispid; cymes open; pistils 12 to 18; White Mts 



42. P. hispidula. 

 Lower stipules 2 to several-cleft into filiform lobes which usually form a conspicuous 

 basal hair-like tuft; pistils 3 to 12. 

 Cymes corymbosely congested, many-flowered; petals cream-color or yellowish; 



Siskiyou region 43. P. daucifolia. 



Cymes few-flowered, dichotomously and openly branched; petals white or pinkish; 

 Humboldt and Del Norte Cos. 



Leaves green ; root-crowai simple 44. P. howellii. 



Leaves silvery-villous ; root-crown branched 45. P. sericata. 



Pedicels very slender, recurved ; cymes open-panicidate, much branched 46. P. parryi. 



b. Bractlets linear to filiform, often much reduced. 



Leaflets 9 to 17, cuneate-obovate to cuneate-oblong, toothed above the base; herbage glandular 

 and more or less spreading-pubescent ; petals cuneate, emarginate ; filaments all broadly 

 dilated 47. P. douglasii. 



Leaflets 5 to 11, cuneate-oblanceolate or cuneate-oblong, 3 to 5-toothed at apex only; herbage 

 silky; filaments usually all linear-subulate (rarely dilated) ; petals usually linear-acute 

 (rarely broader) 48. P. congesta. 



I. Subgenus Dasiphora. Shrub; leaves pinnate; styles lateral, clavate; achenes 

 hairy, 



1. P. fruticosa L, Bush Cinquefoil. Much-branched shrub 1 to 4 feet high ; 

 branchlets densely leafy, silky-hairy when young, in age with brownish shreddy 

 bark; leaves pinnate, white-pubescent beneath, the blades I/2 to % inch long, 4 to 

 7 lines wide, the leaflets crowded, the petioles 1 to 2 lines long; leaflets 3 to 7, oblong, 

 entire, 2 to 5 lines long, the margin often revolute; flowers % to 1 inch wide; petals 

 yellow, orbicular; stamens about 25. 



