68 



Rydberg: Notes on Rosaceae 



Leaflets broadly oval, thin, 

 2-5 cm. long; plant 

 nearly unarmed. 

 Leaflets narrowly oval or 

 elliptic, less than 3 

 cm. long. 

 Leaflets firm; prickles 

 few. 

 , Leaflets thin; prickles 



numerous. 

 Sepals ovate, less than i cm. long, not conspicu- 

 ously caudate; leaflets glandular-double- 

 toothed, glabrous or slightly glandular-granu- 

 liferous beneath. 

 Hypanthium elongate, with a distinct neck. 

 Hypanthium glabrous.- 



Leaves finely puberulent beneath; fruit 



elliptic; plant unarmed or nearly so. 

 Leaves glabrous; fruit urn-shaped; prickles 

 rather stout, flattened below. 

 Hypanthium pilose when young, ellipsoid; 

 leaves pilose, densely so and glandular- 

 granuliferous beneath. 

 Hypanthium densely bristly or prickly. 



Leaflets thin, usually more than 1.5 cm. long, not 

 glaucous; sepals more than i cm. long. 

 Leaflets densely glandular-granuliferous beneath ; 



teeth usually lanceolate in outline. 

 Leaflets sparingly glandular-granuliferous be- 

 neath; teeth ovate in outline. 

 Leaflets firm, glaucous, less than 1.5 cm. long; 

 sepals less than i cm. long. 



in. MiNUTIFOLIAE 



One species. 



IV. Gymnocarpeae 



Leaves glabrous beneath; prickles very slender. 



Flowers usually solitary, not leafy-bracted; stipules nar- 

 row; leaflets with lanceolate teeth; fruit 6 mm. in 

 diameter or less. 

 Leaflets 5-7, usually more than 1.5 cm. long, the 



terminal one rounded at the base. 

 Leaflets 7-9, usually less than 1.5 cm. long, the terminal 

 one usually acute or cuneate at the base. 

 Flowers mostly 2-4 together, leafy-bracted; upper stipules 

 broadly dilated; leaflets with broadly ovate teeth; fruit 

 6-8 mm. broad. 

 Leaves pubescent beneath; prickles usually stouter. 



20. R. saliclorum. 



21. R. ullramontana. 



22. R. gratissima. 



23. R. Bolanderi. 



24. R. Pringlet. 



25. R. Copelandii. 



26. R. pilifera. 



27. R. graniilala. 



28. R. spithamaea. 



29. R. sonomensis. 



30. R. miniUiflora. 



I. CANINAE. The members of this group -are natives of the 



