6 4 



Rydberg: Notes on Rosaceae — XIV 



1 6. R. Engelmanni. 



17. R.acicularis. 



18. R. Bourgeauiana. 



19. 

 20. 



R. blanda. 

 R. subblanda. 



Stem densely bristly even in age; stipules, 

 petioles, and rachis often glandular- 

 granuliferous; flowers solitary. 

 Hypanthium decidedly pear-shaped or 

 elliptic, acute at the base, with a 

 distinct neck at the top. 

 Leaflets conspicuously glandular-granu- 

 liferous, but scarcely at all hairy 

 beneath, rounded -oval, often double- 

 toothed. 

 Leaflets densely pubescent only rarely 

 slightly glandular beneath, mostly 

 elliptic, simple-toothed. 

 Hypanthium subglobose, almost without 

 a neck; leaflets glandular-granuliferous 

 as well as pubescent beneath. 

 Stem unarmed or when young slightly covered 

 with more or less deciduous prickles; 

 flowers solitary or few. 

 Leaflets decidedly and finely pubescent 



beneath. 

 Leaflets glabrous on both sides, glossy, 

 lnfrastipular prickles present. 



Hypanthium globose; neck usually obsolete. 

 Stipules, petiole, and rachis copiously glandu- 

 lar; leaflets often double-toothed with 

 gland-tipped teeth. 

 Stipules, petiole, and rachis not conspicuously 

 glandular, the first ones sometimes 

 slightly gland-toothed. 

 Leaflets glabrous or nearly so. 

 Leaflets finely puberulent beneath. 



Young shoots armed with stout flat 

 prickles; fruit about 15 mm. broad. 

 Young shoots merely bristly; fruit 

 rarely more than 10 mm. broad. 

 Hypanthium elongate, pyriform or elliptic, with 

 a distinct neck. 



9. Rosa subglauca Rydberg 



This is related to R. arkansana Porter and R. suffulta Greene; 

 from the former it differs in the decidedly obovate leaflets, 

 rounded at the apex and more coarsely toothed ; from the latter 

 in the glabrous leaves; and from both in the glaucous foliage. 



Saskatchewan: Six miles east of Battle River, August 15, 

 1906, Macoun & Herriot 70942, 70943-, Breakmore, July 18, 

 1906, 70941; Brandon, 12389. 



21. R. Fendleri. 



22. R. Woodsii. 



23. R. terrens. 



24. R. Macounii. 



25. R. pyrifera. 



