74 Rydberg: Notes on Rosaceae 



County, October i6, 1900, Dudley 3388 (in the Dudley her- 

 barium, Leland Stanford University). 



13. Rosa rivalis Eastw. Bull. Torrey Club 32: 198. 1905 



This species is related to R. Woodsii and R. pisocarpa, but its 

 leaflets are much larger, broader and thinner, broadly oval, 

 sometimes almost orbicular and perfectly glabrous beneath. 

 They resemble somewhat those of R. myriantha, which, however, 

 has pubescent leaves. I have not seen the type of this species 

 but showed Kellogg & Harford's No. 226 to Miss Eastwood, and 

 she said that she regarded the same as typical R. rivalis. In the 

 Missouri Botanical Garden herbarium, the locality of this number 

 is given as San Francisco. This is probably wrong. In the her- 

 barium of the New York Botanical Garden, Kellogg's field label 

 is present, which reads: "Rosa. Long Valley, June 11, 1869, red, 

 7 or 8 feet high — along shady rivulet — Kellogg." According to 

 Miss Eastwood, Long Valley is not very far from the type locality 

 of R. rivalis. A form with leaves somewhat pubescent beneath 

 and somewhat glandular petioles was collected by Mrs. Austin (No. 

 400) at Mill Creek, California. The following belong to R. rivalis: 



California: Long Valley, Kellogg & Harford 226; Placer 

 County, 1893, Mrs. Hardy (on this sheet Crepin has written: 

 "N'est pas le R. spithamaea Wats., ou le californica, etc."). 



Oregon : Cold Spring, Crook County, 1898, Coville & Applegate 



14. Rosa chrysocarpa Rydberg, sp. nov. 



Stem tall, 1-3 m. high, terete, at first light yellowish green, 

 later grayish brown, armed with straight prickles, somewhat re- 

 trorse, terete, 3-7 mm. long, usually more or less flattened at the 

 very base, some of them infrastipular, others scattered, of various 

 lengths; young shoots copiously armed with bristle-like prickles; 

 floral branches 1-2 dm. long, armed with mostly infrastipular 

 prickles; stipules adnate, glabrous, 1-2 cm. long, the lower narrow, 

 the upper dilated, glandular-dentate or ciliate on the margins; 

 petiole and rachis glabrous, sometimes with a few prickles; leaflets 

 five to seven, elliptic or oval thin, glabrous on both sides, yellowish 

 green, coarsely serrate throughout, petioluled, 1-4 cm. long; flowers 

 corymbose, leaf y-bracted ; pedicels 1-2 cm. long, glabrous; hypan- 

 thium globose, glabrous, at first light-green, in fruit about i cm. 



