Rydberg: Notes ox Rosaceae 77 



sides, coarsely crenate-serrate with broad teeth; flowers corymbose; 

 hypanthium round-ellipsoid or globose, with a short neck; sepals 

 ovate, caudate-acuminate, about 8 mm. long, villous within and 

 on the margins; petals 8-io mm. long. 



This species is related to R. pisocarpa and R. uUramonlana, 

 but differs in the shorter and broader thicker leaflets, the more 

 prominent armature, and the small flowers. 



Nevada: mountains west of Franktown, 1912, Heller 10S20 

 (type, in the herbarium of the New York Botanical Garden). 



19. Rosa pisocarpa A. Gray, Proc. Am. Acad. 8: 382. 1872 



Professor Crepin badly misunderstood this species. Nearly 

 anything with a small hypanthium he referred to it. Specimens 

 of R. Woodsii, R. Fendleri, R. ultramontana, together with two 

 undescribed species, and even R. Engelvianni we find determined 

 as R. pisocarpa by him. It belongs purely to the Columbia 

 Valley region and is not found in the Rocky Mountain states. It 

 is characterized by the elliptic or oval leaflets, finely puberulent 

 beneath, the comparatively short and glandular sepals, the 

 numerous flowers and short ascending straight prickles. 



The only specimen from California seen by the writer is one 

 collected by Mrs. Austin without definite locality. 



20. Rosa salictorum Rydberg, sp. nov. 



Stem slender, 3-5 m. high or in open places lower, unarmed or 

 nearly so, except the new shoots, which are bristly at the base; infra- 

 stipular spines seldom present; leaves five- to seven-foliolate; stipules 

 adnate to the petioles, 1.5-2 cm. long, the upper dilated., more or 

 less toothed, finely puberulent; petioles and rachis unarmed, puber- 

 ulent; leaflets broadly oval, coarsely and evenly serrate, thin, 

 equally green on both sides, glabrous above, finely puberulent 

 beneath, rounded or acute at both ends, 2-4 cm. long; flowers 

 corymbose, conspicuously leaf-bracted ; pedicels glabrous; hypan- 

 thium glabrous, globose, contracted above, in fruit about i cm. 

 broad; sepals lanceolate, caudate-acuminate, about 15 mm. long, 

 glabrous on the back, tomentose within and on the margins, erect 

 and persistent in fruit; petals pink, about 15 mm. long; styles 

 distinct, persistent, not exserted. 



