Rydberg: Notes on Rosaceae 



67 



Leaflets green on both sides; petals 



about 2 cm. long. 

 Leaflets pale beneath; petals about 

 I cm. long. 

 Leaflets not very thin, dark-green; 

 prickles stout. 

 Leaves scarcely pubescent beneath. 

 Leaves decidedly pubescent beneath. 

 Leaflets rather simply serrate; 

 hypanthium pilose when young. 

 Leaflets conspicuously double-ser- 

 rate; hypanthium glabrous. 

 Stipules, petioles, and rachis not conspicu- 

 ously glandular (stipules glandular- 

 denticulate in no. i8). 

 Leaflets glabrous or nearly so. 



Leaflets broadly oval, 3-5 cm. long. 

 Leaflets obovate to elliptic, rarely 3 

 cm. long. 

 Leaflets usually obovate, not shin- 

 ing; plant not conspicuously 

 prickly. 

 Leaflets elliptic, shining; plant 

 usually very prickly. 

 Leaflets more or less pubescent beneath. 

 Leaflets villous or pilose beneath, 

 rounded or broadly oval ; prickles 

 stout. 

 Leaflets sparingly pubescent on 

 both sides, thin; prickles rather 

 few. 

 Leaflets pubescent on both sides, 

 densely so beneath, thick; 

 prickles very numerous. 

 Leaflets finely puberulent beneath; 

 prickles rather weak. 

 Leaflets rounded-oval or subor- 

 bicular, thick; stipules conspicu- 

 ously glandular-denticulate; pe- 

 tals less than i cm. long. 

 Leaflets elliptic to oval; stipules 

 slightly if at all glandular- 

 dentate; petals larger. 

 Sepals decidedly glandular on 

 the back; prickles few, small 

 and ascending. 

 Sepals not glandular on the 

 back. 



9. R. pinetorum. 



10. R. calavera. 



3. R. muriculala. 



11. R. sanlae-crucis. 



12. R. Dudley i. 



13. R. rivalis. 



14. R. chrysocarpa. 



15. R. tnohavensis. 



16. R. myrianlha. 



17. R. Davyi. 



18. R. rotundata. 



19. R. pisocarpa. 



