CERTAIN WESTERN ROSES. 261 





^A 



mt"^ 



Rosa adenocarpa. Dwarf and almost wholly herbaceous, 

 simple and upright above the almost entirely subterranean 

 woody part, only 4 to 7 inches high, with about 4 leaves and 

 1 to 3 terminal small flowers ; stem slender, wholly glabrous 

 and unarmed, or in a few with here and there a short stout 

 straight prickle: leaflets 5, rarely 7, very unequal, very 

 broadly obovate to nearly oi"bicular, petiolulate, coarsely, 

 incisely and somewhat doubly serrate, apparently glabrous, 

 but with a trace of clamminess ; rachis and petiolules destitute 

 of prickles, but quite densely glandular-villous ; stipules not 

 very broad, their lobes subulate and strongly glandular- 

 serrulate : fruit quite strongly armed with gland-tipped 

 prickles. 



Singular species, despite all its peculiar characteristics, a 

 genuine member of this gymnocarpous group, known only as 

 collected on Mount Grayback in southwestern Oregon, 15 

 June, 1904, by C, V. Piper ; type sheet of five specimens in 

 U. S. Herb. n. 527765. 



gym 



nocarpous . Among 

 next following : 



Rosa Bolandri. Shrub evidently low and rather diffusely 

 branched, the branches and even the branchlets strongly and 

 even doubly armed, showing long stoutish spreading or 

 even slightly infrastipular spines and plenty of intervening 

 slender prickles of several sizes, most of these slightly ascend- 

 ing : leaves and leaflets small, the latter 5 to 7, from round- 

 obovate in the very small lowest pair, to oval in the others, 

 acutely and almost simply serrate all around ; rachis with a 

 few stout prickles and many short-stalked glands ; stipules 

 small for the group, but the margin bordered strongly with 

 the usual gland-tipped ciliation : pedicels very short, sparsely 

 glandular-hispid: mature fruit very large f< 

 crowned with all the sepals as persistent. 



group 



V? 



some unrecorded 



LEAFLETS, Vol. II, pp. 261-275. 6 November, 1912, 





