444 ROSACEAE 



teeth, glabrous on both sides; flowers solitary; hypanthium glabrous, globose, 

 in fruit about 1 cm. thick; sepals glabrous or sparingly glandular; petals rose- 

 colored, 1.5-2 cm. long. Canons: Colo. e Utah Ariz. Submont. Mont. 

 Je-Au. 



21. R. Fendleri Crep. Stem low, 1 m..high or less, terete, armed with a 

 few prickles, which are straight, slender, 5 mm. long or less; stipules glandular- 

 pruinose on the back, more or less glandular-dentate; rachis and petiole densely 

 glandular-puberulent and often somewhat glandular-hispid or with weak prickles; 

 leaflets 5-7, elliptic, oval, or obovate, 1-3 cm. long, rather thin, green and gla- 

 brous above, slightly paler, puberulent and glandular-pruinose beneath, often 

 double-serrate; hypanthium globose, glabrous, in fruit 8-10 mm. broad; sepals 

 sparingly glandular on the back; petals rose-colored, obcordate, about 1.5 cm. 

 long. Woods and copses : N.M. Ariz. S.D. Mont. Plain Submont. My- 

 Jl. 



R. Bourgeauiana X Fendleri. This resembles R. Fendleri in habit, the corymbose 

 inflorescence and the small flowers and fruit, but the plant is much more prickly, the 

 leaflets firmer and more conspicuously double-toothed. Mont. 



22. R. chrysocarpa Rydb. .Stem tall, 1-3 m. high, terete, at first light- 

 yellowish green, armed with straight prickles, somewhat retrorse, terete, 3-7 

 mm. long, some of them infrastipular, others scattered; young shoots copiously 

 armed with bristle-like prickles; stipules glandular-dentate or ciliate; petiole 

 and rachis glabrous, sometimes with a few prickles; leaflets 5-7, elliptic or oval, 

 thin, glabrous on both sides, yellowish green, coarsely serrate throughout, 1-4 

 cm. long; hypanthium globose, at first glabrous, light green, in fruit about 1 cm. 

 thick and orange; sepals glabrous or nearly so on the back. Canons: Utah 

 Ida. Son. Submont. Je. 



23. R. Woodsii Lindl. Stem terete, glabrous, 0.5-2 m. high, armed with 

 rather numerous, straight or slightly curved prickles, 4-8 mm. long; stipules 

 glabrous, usually glandless, entire or somewhat toothed; rachis and petiole gla- 

 brous, occasionally with a few prickles or stalked glands; leaflets 5-7, obovate, 

 cuneate at the base, serrate above, glabrous on both sides, glaucous beneath, 

 1-2 cm., rarely 3 cm. long; hypanthium globose, glabrous, in fruit 8-10 mm. 

 thick; sepals glabrous or slightly glandular on the back. R. Macounii Rydb. 

 (Fl. Colo.), not Greene. R. Sandbergii, and (?) R. fimbriatula Greene. R. deserta 

 Lunell. River banks and copses: Sask. N.D. Kans. Colo. Utah B.C. 

 Plain Mont. Je-Jl. 



24. R. salictorum Rydb. Stem 3-5 m. high, unarmed or nearly so, except 

 the new shoots; infrastipular prickles if present small and straight; stipules more 

 or less toothed, finely puberulent; leaflets 5-7, broadly oval, coarsely and evenly 

 serrate, glabrous above, finely puberulent beneath, 2-4 cm. long; hypanthium 

 glabrous, globose, in fruit about 1 cm. broad; sepals glabrous on the back; petals 

 pink, about 15 mm. long. Among willows: Nev. Ida. (? Utah.) Jl. 



25. R. ultramontana (S. W ats -) Heller. Stem tall, 1-3 m. high, rarely 

 5 m. high, terete, armed with straight prickles, 5-7 mm. long; stipules puberulent 

 and often pruinose on the back, usually denticulate; leaflets usually 7, oval, 

 usually rounded at both ends, serrate, with broad teeth, 2-4 cm. long, green 

 and dull on both sides, rather firm, glabrous above, puberulent and often also 

 pruinose beneath ; hypanthium globose, glabrous, in fruit 8-10 mm. thick; sepals 

 glabrous or slightly puberulent on the back (in the related R. pisocarpa of the 

 Pacific Coast glandular on the back); petals obcordate, 1.5 cm. long or a little 

 more. R. californica ultramontana S. Wats. Woods and copses: Ore. Mont. 

 Nev. n Calif. Submont. Je-Au. 



26. R. praetincta Cockerell. Stem about 1.5 m. high, armed with numerous 

 often bristle-like prickles, which are terete, 5-8 mm. long; stipules slightly puberu- 

 lent or glabrate, often more or less toothed; rachis and petiole finely puberulent, 

 usually with a few bristle-like prickles; leaflets obovate or rarely oval, very 

 thin, 1-3 cm. long, sharply serrate, with incurved teeth, green on both sides, 

 glabrous above, finely puberulent on the veins and pruinose beneath; hypan- 

 thium glabrous, globose; sepals glabrous on the back; petals about 2 cm. long, 



