ROSE FAMILY 415 



21. P. intermittens Rydb. Stems ascending, about 3 dm. high, sparingly 

 hairy; leaflets cuneate-oblanceolate, most of them sharply cut-toothed, with 

 lanceolate teeth directed forward, sparingly silky above, grayish tomentose. 

 beneath; inflorescence few--flowered; bractlets linear, 4 mm. long; sepals lance- 

 olate, acuminate, 5-6 mm. long; petals obcordate, 6-7 mm. long. Perhaps a 

 hybrid between P. glaucophylla and P. filipes. Mountains: Alta. — Colo. — • 

 Nev. Submont. — Mont. Je-Au. 



22. P. viridescens R^^db. Stem 5-7 dm. high, sparingly sillcy with appressed 

 or slightly spreading hairs; leaves silky, but green above, silky and somew^hat 

 tomentulose beneath; leaflets oblanceolate or spatula te, deeply toothed or divided 

 nearly halfway to the midrib, with lanceolate often somewhat divergent teeth; 

 hypanthium silky; bractlets lanceolate, a httle shorter than the ovate-lanceolate 

 sepals;_ corolla 10-15 mm. in diameter; petals obcordate, equalling or slightly 

 exceeding the sepals. Valleys : Man. — Alta. — Wyo. Submont, — Mont, My-Au. 



23. P. glomerata A. Nels. ^ Stem^ stout, 4-8 dm. high, softly pubescent 

 ^^^th appressed or slightly spreading hairs; leaflets 4-8 cm. long, oblanceolate or 

 narrowly obovate, cut-toothed, green, but densely appressed-hairy above, more 

 or less tomentose beneath; sepals broadly lanceolate, acuminate, 5-8 mm. long; 

 petals rounded-obcordate, 6-8 mm. long. River bottoms: Wash. — -Calif. — • 

 Wyo. — Mont. Snbmont. — Mont, Je-Au. 



24. P. dichroa Rydb. Stems strict, 4-6 dm. high, densely white-strigose; leaf- 

 lets oblanceolate, 3-6 cm. long, green and appressed-silky above, white-tomentose 

 and silky beneath, cut-toothed nearly halfway to the midrib; hypanthium silky; 

 bractlets lanceolate, 3-4 mm. long; sepals ovate, acute, 6 mm. long; petals obcor- 

 date, 7-8 mm. long. Meadow^s: w Alont. — Ore. — Nev. — Utah. Submont. Je-Au. 



25. P. gracilis Dougl. Stem 4-7 dm. high, slender, slightly silky-villous ; 

 leaflets 3-6 cm. long, oblanceolate, green and nearty glabrous above, densely 

 and finelj^ white-tomentose beneath, divided about halfway to the midrib; bract- 

 lets lanceolate, a little shorter than the ovate-acuminate sepals; corolla 15-20 mm. 

 m diameter; petals obcordate, deeply emarginate, often over 1 cm. long, much 

 exceeding the sepals. Meadows: B.C. — w Mont. — Ore. Subinont. Je-S. 



26. P. camporum Rydb. Stem simple, strict, 3-4 dm. high, hirsute with 

 spreading or reflexed hairs; leaflets obovate or broadly oblanceolate, 2-5 cm. 

 long, cut-toothed, densely hirsute-strigose above, w^hite-tomentose and silky 

 beneath; bractlets lanceolate, 3-4 mm. long; sepals ovate-lanceolate, 4-5 mm. 

 long; petals obcordate, 5-6 mm. long. Meadows: (Black HiUs) S. D.— Man. 

 Plain. Je-Jl. "" 



27. P. filipes Rydb. Stems 3-5 dm. high, slender, silky-hirsute or silky- 

 strigose; leaflets obovate to oblanceolate, obtuse, coarsely crenate, 2-6 cm. long, 

 green and sparingly strigose above, white-tomentose beneath; bractlets linear- 

 lanceolate, a little shorter than the lanceolate acute sepals; petals yellow^, broadly 

 obcordate, 6-8 mm. long, exceeding the sepals. P. Hippiana pulcherrima S. 

 Wats. P. gracilis Porter & Coulter, not Dougl. Mountains, valleys: Man. 

 — N.M — Utah — Alta. Suh7nont,' — Mont, Je-Au. 



28. P, subjuga Rydb. Tufted; stems many, 1-3 dm. high, silky-villous, 



few-leaved; leaflets 1-4 cm, long, oblong or obovate, deeply incised into oblong, 

 rather obtuse segments, silky and green above, silky and white-tomentose 

 beneath; bractlets oblong, obtuse or acute, about a third shorter than the tri- 

 angular-lanceolate sepals; petals broadly obcordate, exceeding the sepals. Moun- 

 tains: Colo. Mont. 



29. P. Vreelandii Rydb. Stems ascending, 1.5-2 dm. high, glabrous and 

 straw-colored below, sparingly pubescent above; basal leaves 5-foUolate, digitate, 

 or pinnate with closely approximate leaflets; leaflets cxmeate or obovate-cuneate, 

 glabrous or ciliate on the margins and veins, more or less glaucous, 1-2 cm. long, 

 crenate with rounded-ovate teeth at the apex; inflorescence 1-4-flowered; bract- 

 lets elliptic or oblong, obtuse, about 3 mm. long; sepals ovate, acute, 4-5 mm. 

 long; petals broadly obcordate, about 7 mm. long. Mountains: Mont. Svb- 

 <ilp^ Am, 



