G ROSS ULA RIA CEA E. 487 



slender; berry 8-12 mm. in diameter, with subulate prickles. In rocky woods, 

 N. B., south to N. Car., west to Manitoba and Mo. April-June. 



2. Ribes Huronense Rydb. LAKE HURON GOOSEBERRY. Infra-stipular 

 spines slender, solitary, 8-10 mm. long, ascending; prickles few and weak; stem 

 finely pubescent; petioles slender, 1-2 cm. long, very pubescent; leaf-blade 

 rounded, obtuse at the base, deeply 5-lobed, incised, densely and rather coarsely 

 pubescent; peduncles slender but short, about 15 mm. long, generally 3-flowered; 

 calyx very pubescent; petals broadly cuneate, white; styles distinct to the middle; 

 berry bristly or weakly spiny. Intermediate between the preceding and the fol- 

 lowing, but more pubescent than either. Type from Lake Huron [R. Cynosbati 

 y Hook] . 



3. Ribes setosum Lindl. BRISTLY GOOSEBERRY. (I. F. f. 1866.) Infra- 

 axillary spines 13 together, slender or rather stout, 5-10 mm. long, spreading. 

 Bristles usually numerous and stout; leaves slender-petioled, more or less finely 

 pubescent, at least when young, 1-3 cm. in width, broadly ovate or orbicular, 3-5- 

 lobed, the lobes incised-dentate; flowers 1-4, 6-10 mm. long; fruit sparingly 

 bristly, or often glabrous, dark blue, very sour. On lake shores and in thickets, 

 Manitoba to Mont., Neb. and Wyo. May. 



4. Ribes Uva-crispa L. GARDEN GOOSEBERRY. (I. F. f. 1870.) Spines 

 stout, spreading or reflexed, usually 3 together. Prickles scattered or none; leaves 

 short-petioled, orbicular or broader, pubescent, at least when young, seldom over 

 2.5 cm. wide, 3~5-lobed, the lobes obtuse and crenate -dentate; peduncles short, 

 1-2 -flowered, usually pubescent; flowers green, about 6 mm. long. Along road- 

 sides in N. J. and N. Y., escaped from gardens. Native of Europe and Asia. 

 May. 



5. Ribes oxyacanthoides L. HAWTHORN OR NORTHERN GOOSEBERRY. 

 (I. F. f. 1868.) Spines generally solitary, light colored, 4-10 mm. long, often 

 short. Prickles commonly wanting; leaves petioled; petioles and lower leaf- 

 surfaces commonly pubescent; flowers greenish-purple or white, 6-8 mm. long; 

 berry 8-12 mm. in diameter, reddish purple when ripe. In wet woods and low 

 grounds, Lab. and Newf. to the N. W. Terr., N. J. and Neb. May -July. 



6. Ribes rotundifolium Michx. EASTERN WILD GOOSEBERRY. (I. F. f. 

 L869.) Closely resembling the preceding, the spines commonly shorter, or often 

 altogether wanting, and the prickles none. Leaves similar, but more shining 

 beneath when young; flowers greenish-purple, 6-8 mm. long; stamens exserted 

 for about ^ their length ; berry usually not more than 8 mm. in diameter. In rocky 

 woods, Mass, and N. Y. to N. Car. May-July. 



7. Ribes gracile Michx. SLENDER GOOSEBERRY. (I. F. f. 1867.) Branches 

 slender and generally purplish. Spines slender, solitary, or 2 or 3 together, purp- 

 lish, 6-10 mm. long or more. Prickles none; leaves slender-petioled, somewhat 

 pubescent when young, orbicular, 2-30.5 cm. wide, truncate or obtuse at the base, 

 3~5-lobed, the lobes rather blunt, dentate ; pedicels very slender, 1-2 cm. long; 

 flowers white, drooping, 10-12 mm. long; calyx-tube narrow, very short; berry 

 reddish purple, 8-10 mm. in diameter. In dry or rocky soil, 111. and Kans. to 

 La. and Tex. May. 



8. Ribes Missouriensis Nutt. MISSOURI GOOSEBERRY. Branches stout, 

 gray or whitish with shreddy bark; spines usually 3 together, stout, 8-15 mm. 

 long; bristles numerous on the young shoots, rather stout, usually none on the 

 older stems and their branches; leaves with stouter petioles, pubescent especially 

 when young, 26 cm. in diameter; flowers white, 1015 mm. long; fruit purple, 

 10-15 mm - i n diameter. It has been confused with the preceding. River banks 

 and plain thickets, from 111. and Penn. to Minn., Black Hills of S. Dak., and Kans. 

 March-May. 



9. Ribes lacustre(Pers.)Poir. SWAMP GOOSEBERRY. (I. F. f. 1871.) Spines 

 slender, weak, generally clustered. Branches usually densely bristly; petioles 

 slender, pubescent ; leaves nearly orbicular, thin, pubescent along the veins be- 

 neath, deeply 5 7-lobed, 3-5 cm. wide, the lobes acutish, incised-dentate; flowers 

 green; pedicels slender, bracted at the base, about 4 mm. long; calyx-lobes short, 

 broad, spreading; stamens very short, not exserted; berry about 4 mm. in diam- 

 eter, reddish, covered with weak bristles. In swamps and wet woods. Newf. to 

 Mass., Penn., Mich., Br. Col. and Wash. May -June. 



