SAXIPRAGACE^E. 47 



2. R. hirtellum, Michx. (SMALL WILD GOOSEBERRY.) Stems 

 with very short thorns or none. Peduncles very short, 1-2- 

 flowered. Berry small y smooth. Low grounds. 



3. R. lacus'tre, Poir. (SWAMP GOOSEBERRY.) Shrubby. Young 

 stems prickly, and thorny at the bases of the leaves. Leaves 

 cordate, deeply 3-5-lobed, the lobes deeply cut. Racemes lf.-9-flow- 

 ered, slender, nodding. Fruit bristly. Swamps and wet woods. 



4. R. fior'idum, L. (WILD BLACK CURRANT.) Stems and fruit 

 ivithout prickles or thorns. Leaves resinous-dotted, sharply 3-5- 

 lobed, doubly serrate. Racemes many-flowered, drooping. 

 Calyx bell-shaped. Fruit black, smooth. Woods. 



5. R. rubrum, L. (WILD RKD CURRANT.) A low shrub with 

 straggling stems. Leaves obtusely 3-5-lobed. Racemes from 

 lateral buds separate from the leaf-bitds, drooping. Calyx flat. 

 Fruit red, smooth. Bogs and wet woods. 



3. PARNAS'SIA, Tourn. GRASS OP PABNASSUS. 

 P. Carolinia'na, Michx. Petals sessile, very veiny. Sterile 

 filaments 3 in each set. Leaves ovate or rounded, usually only one 

 low down on the stalk. Flower an inch across. Beaver meadows 

 and wet banks. 



3. SAXIF'RAGA, L. SAXIFRAGE. 



S. Virginien'sis, Michx. (EARLY SAXIFRAGE.) Stem 4-9 

 inches high. Scape clammy. Leaves obovate, crenately toothed. 

 Petals white, oblong, twice as long as the sepals. Damp rocks 

 along streams. 



4. MlTEIi'IiA, Tourn. MiTRE-WoKT. BisHop's-CAP. 



1. M. diphyl'la, L. (TWO-LEAVED MITRE-WORT.) Stem hairy. 

 Leaves cordate, 3-5-lobed, those on the scape 2, opposite, nearly 

 sessile. Flowers white. Rich woods. 



2. M. nuda, L. (NAKED-STALKED M.) Stem small and 

 delicate. Leaves kidney-shaped, doubly crenate. Scape leafless, 

 few-flowered. Flowers greenish. Deep woods, on moss-covered 

 logs, etc. 



5. TIAREL'LA, L. FALSE MITBE-WOBT. 



T. COrdifo'lia, L. Scape leafless, 5-12 inches high. Leaves 

 heart-shaped, sharply toothed, sparsely hairy above, downy 

 beneath. Petals white, oblong. Rich woods. 



