396 GROSSULARIACEAE 



glabrous, 1-4-flowered ; bract small and glabrous; hypanthium glabrous; tube 

 2.5-3.5 mm. long, a little longer than the glabrous sepals ;. berry red-purple, 

 glabrous, about 8 mm. thick. R. inerme Rydb. R. vallicola Greene, a more 

 pubescent form. Mountains: B.C. Alta. N.M. Utah Calif. Submont. 

 Mont. My-Jl. 



7. G. Purpusi (Koehne) Rydb. Shrub with fine puberulent branches; 

 nodal spines 1 cm. long or less; leaves mostly truncate at the base, decidedly pub- 

 escent and slightly glandular; peduncles short; hypanthium glabrous; tube about 

 3 mm. long, as long as the sepals, which usually bear a few scattered hairs on the 

 lower side; berry glabrous, purple. R. Purpusi Koehne. Mountains: Colo. 

 N.M. Submont. My-Je. 



8. G. leptantha (A. Gray) Cov. & Britt. A shrub 1-2 m. high, the branches 

 sometimes bristly; spines 0.5-1.5 cm. long; leaves reniform-orbicular in outline, 

 crenate-dentate, truncate at the base, 0.52 cm. broad, glabrous or pubescent on 

 both sides; peduncles 1-2-flowered, shorter than the leaves; pedicels very short; 

 hypanthium greenish, 4-6 mm. long, about half as thick; sepals greenish white, 

 pubescent; petals spatulate, white or pinkish, about hah" as long as the sepals; 

 berry 6-8 mm. in diameter. R. leptanthum A. Gray. Mountains: N.M. Colo. 

 Ariz. Utah. Submont. Mont. Ap-Je. 



9. G. velutina (Greene) Cov. & Britt. A shrub 1-2 m. high; young shoots 

 finely pubescent but not bristly; spines 0.5-2 cm. long, straight or slightly curved; 

 leaf -blades crenate, 1-1.5 cm. broad, cordate or truncate at the base, finely 

 pubescent on both sides; hypanthium about 2 mm. long and 3 mm. thick; sepals 

 yellow, about 3 mm. long; petals oblong or obovate, yellow, 2-2.5 mm. long; berry 

 yellow, about 7 mm. thick. R. leptanthum brachyanthum A. Gray. R. idutinum 

 Greene. Mountains: Ore. Utah 'Ariz. Calif. Son. Submont. Ap-Jl. 



2. LIMNOBOTRYA Rydb. SWAMP CURRANTS. 



Shrubs, armed with pectinately divided nodal spines, usually also bristly. 

 Leaves more or less pentagonal in outline, palmately veined and quinately-cleft 

 and incised or toothed. Flowers perfect, usually several, in bracted racemes; 

 pedicels jointed just under the short stipe-like base of the flower, usually with 

 2 minute bractlets just below the node. Hypanthium slightly produced beyond 

 the ovary; tube saucer-shaped. Sepals 5, ascending, oval or rounded. Petals 

 reniform-flabellate, clawed, erect. Stamens not exceeding the petals. Fruit a 

 currant-like berry. 



Leaves glabrous or nearly so; fruit black. 



Lobes of the leaves acute, incised, the terminal one decidedly longer; basal sinus open; 



stem usually densely bristly. 



Nodal spines scarcely stronger than the bristles; stipitate base of the flowers 

 almost obsolete; peduncle and avary densely glandular and the former also 

 finely villous. 1. L. lacustris. 



Nodal spines usually much stronger than the bristles ; stipe-like base of the flowers 

 evident, 0.5-1 mm. long; peduncles and ovary sparingly glandular, but not 

 at all villous. 2. L. echinata. 



Lobes of the leaves obtusish, toothed, the terminal one scarcely longer; basal sinus 

 usually narrow; stem except in depauperate forms usually only slightly bristly; 

 stipe-like base of the flower about 0.5 mm. long; peduncles glandular and some- 

 times puberulent. 3. L. parvula. 

 Leaves pubescent and glandular on both sides; fruit bright red. 4. L. montigena. 



1. L. lacustris (Pers.) Rydb. Shrub 1-2 m. high; spines and bristles slen- 

 der, 2-4 mm. long; petioles ciliate; leaf-blades 2-5 cm. long, cleft about three- 

 fourth their length; divisions rhombic, incised into oblong acute teeth; flowers 

 4^10, light green or purplish; stamens shorter than the petals; berry 6-8 mm. in 

 diameter; densely glandular-hispid. Ribes lacustre (Pers.) Poir. Swamps: 

 Newf. Mass. Pa. (Black Hills) S.D. Mack. Boreal Submont. My-Jl. 



2. L. echinata (Lindl.) Rydb. Shrub 1-2 m. high; spines usually com- 

 paratively stout, 3-8 mm. long and bristles fine and numerous; leaves as in the 

 preceding; peduncles and ovary often almost glandless; bractlets about 0.5 mm. 

 long; flowers 6-^20, often purplish; stamens usually equalling the petals; berry 

 8-10 mm. in diameter, sparingly glandular-hispid or glabrous. R. echinatum 

 Lindl. Swamps: Alaska Mont. Ida. n Calif. Submont. My-Jl. 



