The Flora of the Cayuga Lake Basin 239 



Near Key Hill; Larch Meadow; South Hill; Beech Woods, Six Mile Creek; s. e. 

 of Dryden Lake; near Malloryville Bog; McLean Bogs; and elsewhere. 



E. Que. to Minn., southw. to Ga. and Iowa ; less frequent on the Coastal Plain. 



5. Parnassia (Tourn.) L. 

 1. P. caroliniana Michx. Grass of Parnassus. 



Dripping limy ledges in ravines, in marl springs, and on the moors of marl ponds; 

 frequent. July 20-Sept. 



Enfield Glen; Buttermilk Glen; Fall Creek, above and below Forest Home and 

 by the hydraulic laboratory ; moor of Mud Pond, McLean Bogs ; Salmon Creek 

 ravine; moor of Newton Ponds; Crusoe Prairie. 



N. B. to Man., southw. to Va., 111., and Iowa; generally absent on the Coastal 

 Plain. 



6. Ribes L. 



a. Flowers in clusters of 1-4 (5) ; stems spiny at base of leaves and often on the 

 internodes ; hypanthium cup-shaped or short-tubular. (Gooseberries.) 

 b. Hypanthium longer than the sepals; berries prickly; leaves almost velvety 



beneath, subcordate. 1. R. Cynosbati 



b. Hypanthium equaling or shorter than the sepals ; berries not prickly ; leaves 

 sparingly pilose or glabrescent, rarely cordate. 

 c. Petioles without branched trichomes ; leaves sparingly pilose beneath ; sepals 

 narrowly oblong, twice the length of the hypanthium; stamens more or less 

 exserted; a plant of dry places, often 2 m. high. 2. R. rotundifolium 



c. Petioles with branched trichomes ; leaves less pubescent or glabrous ; sepals 

 broadly oblong, equaling the hypanthium; stamens not exserted; a plant of 

 wet places, 1 m. high or less. 3. R. hirtellum 



a. Flowers in racemes; stems spineless (except in R. lacustrc) ; hypanthium saucer- 

 shaped, cup-shaped, or tubular. (Currants.) 

 b. Hypanthium long-cylindrical, two to three times the length of the spreading 



sepals ; flowers fragrant, golden yellow. 4. R. odoratum 



b. Hypanthium saucer- or cup-shaped. 

 c. Leaves resinous-dotted ; hypanthium campanulate or short-oblong. 



d. Hypanthium 8-10 mm. long, glabrous, yellowish ; bracts longer than the 

 pedicels ; twigs with a decurrent ridge from middle of leaf scar. 



5. R. americanum 

 d. Hypanthium 3-6 mm. long, more open, pubescent, paler yellow ; bracts 

 shorter than the pedicels ; twigs without a decurrent ridge from middle 

 of leaf scar. 6. R. nigrum 



c. Leaves not resinous-dotted. 



d. Ovary glandular-pubescent ; hypanthium shallowly cup-shaped. 



e. Canes, at least the younger ones, densely bristly ; larger leaves 4 cm. wide, 



deeply incised-lobed or -parted ; fruit black. 7. R. lacustre 



e. Canes not bristly ; larger leaves 5-7 cm. wide, with broad, doubly serrate 

 lobes ; fruit red. 8. R. prostratum 



d. Ovary glabrous ; hypanthium saucer-shaped, almost flat. 



e. Plant upright ; middle lobe of leaf ovate ; pedicels glandless ; flowers 



yellowish green. 9. R. sativum 



e. Plant weak, subprostrate ; middle lobe of leaf broader, deltoid; pedicels 

 glandular; flowers purplish green. 10. R. triste, var. al- 



binervium 

 1. R. Cynosbati L. Prickly Gooseberry. 



Dry open thickets and scrubby fields or cliffs, in gravelly or stony neutral soils ; 

 common. May. 



