SAXIFRAGACEAE. 83 
74.—R. Grossularia. Bosemann, 47; Fant, 20; Schneider, f. 
180; Shirasawa, 249; Ward, 1:198, f. 100.—R. nigrum. Bose- 
mann, 48; Fant, 19, f. 14; Schneider, f. 181; Ward, 1:206, f. 
107; Willkomm, 31, f. 40—R. petraeum. Schneider, f. 182; 
Willkomm, 9, 31, f. 39.—“R. rotundifolium” [oxycanthoides?}]. 
Brendel, pl. 3—R. rubrum. Bosemann, 48; Fant, 19; Schnei- 
der, f. 181—R. sanguineum. Bosemann, 48; Schneider, f. 182. 
Z. 
2. 
10. 
FE 
Evergreen: stems prickly. R. speciosum. 
Deciduous. 2. 
Buds ovoid, glandular or puberulent: leaf-scars rather 
broad. 3. 
Buds elongated subfusiform: leaf-scars very narrow. 7. 
. Bud-seales and twigs with some sessile resin-glands, gla- 
brate. 4. 
Without sessile resin-glands: buds gray-puberulent. 5. 
. Resin-glands minute: wood fetid. R. nigrum. 
Glands large and conspicuous. R. americanum. 
. Twigs quickly glabrate. 6. 
Twigs rather persistently gray-puberulent. R. odoratum. 
. Spreading and stoloniferous. R. triste. 
Bushy: commonly planted. (Red currant). 
(1). R. vulgare. 
. With very frequent prickles. 8. 
Unarmed. 14. 
. Infra-axillary prickles often large (2X10 mm. or more): 
buds glossy straw-colored. (2). R. missouriense. 
Prickles smaller: buds dull brown. 9. 
. Buds short (3 mm.), downy. R. rotundifolium. 
Buds rather long (5 cr 6 mm.). 10. 
Infra-axillary prickles scarcely larger than the abundant 
others: twigs and buds glossy straw-colored. 
R. lacustre. 
Infra-axillary prickles longer, if accompanied by others. 11. 
Twigs quickly nearly white, with exfoliating epidermis. 12. 
Epidermis more persistent. 13. 
