SAXIFKAGACKiE. (^SAXIFRAGE FAMILY.) 97 



» * Calyx-tube saucer-shaped, expanding immediately above the ovary : peduncles 

 racemosely 5 to 1 5-flowered : anthers very short, pointless : berry small and 

 currant-like, beset with some scattered gland-tipped bristles. 



6. R. lacustre, Voir. Young stems clothed with bristly prickles, and 

 with weak thorns : leaves heart-shaped, 3 to 5-parted, with the lobes deeply 

 cut. — From California and the Rocky Mountains to the N. Atlantic States 

 and Labrador. 



Var. parvulum, Gray. Smaller and nearly glabrous. — The commoner 

 western form. 



§ 2. Thornless and prickless: leaves plaited in the bud: berry unarmed (except 



in No. 7). — Currant. 

 * Calyx dilated immediately above the ovary, rotate or saucer-shaped, 5-parted. 



7. R. prostratum, L'Her. Stems reclined : leaves deeply heart-shaped, 

 5 to 7-lobed, smooth ; the lobes ovate, acute, doubly serrate : racemes erect, 

 slender, flowers greenish : pedicels and the pale red fruit glandular bristly. — 

 From Colorado northward throughout British America, and in the Atlantic 

 States. 



8. R. Hlldsonianum, Richards. .Resembles the last, but the flowers are 

 white and rrmvded in the erect raceme, and the berry is darker and smooth. — The 

 A', bracteosiim of King's and Hayden's Reports, not of Douglas. Montana, 

 Wyoming, and thence through British America to Hudson Bay. 



9. R. cereum, Dougl. Minutely pubescent, usually resinous do/ted and 

 more or less glutnuris, sometimes glabrous : leaves rounded or reniform, ob- 

 scurely or more decidedly 3-lobed, crenately toothed or incised : racemes 

 drooping: pedicels hardly any or shorter than the bract: calyx waxy-white, 

 sometimes greenish or pinkish : berry reddish, sweetish. — From New Mexico 

 to Washington and the Dakotas. 



Var. pedicellare, Gray. Pedicels slender and longer than the bract. — 

 .Montana. 



* * Calyx prolonged above the ovary into a campanulate or cylindrical tube : 



fruit and foliage more or less glandular : bracts conspicuous. 



1- Flowers dull white or greenish, or sometimes purplish-tinged : racemes somewhat 



corymb-like and few-flowered : berry black, smooth. 



10. R. visoosissimum, Pursh. Pubescent and viscid-glandular : leaves 

 cordate-rounded : racemes ascending ; bracts rather shorter than the pedicels. — 

 Idaho and Montana ; also in California. 



11. R. floridum, L. Leaves sprinkled with resinous dots, slightly heart- 

 shaped, sharply 3 to 5-lobed : racemes drooping, downy : bmcts longer than the 

 pedicels. — On the Platte in Colorado, and common in the Atlantic States. 



+- *- Flowers rose-red, or varying' to white : racemes drooping, many-flowered : 

 berry blackish, somewhat hispid-glandular, tough and not juicy. 



12. R. sanguineum, Pursh. Two to twelve feet high, varying from 

 nearly glabrous to tomentose-canescent, either almost glandless or glandular : 

 leaves rounded-cordate. 



Var. variegatum, Watson. Low, nearly glabrous : raceme short and 

 dense, ascending, barely glandular: calyx rose-color : petals white. — R. Wolfl, 

 Rothrock. Mouutains of Colorado ; also in California. 



7 



