126 SAXIFRAGACE.E. 



paniculate above; more or less spatulate-obovate, often obtuse, crenate- 

 dentate, tapering at the base into a broad petiole ; flowers subsessile ; 

 petals oval, twice as long as the calyx ; capsule half inferior. S. vernalis 

 nix. S. nivalis MuM. 



Rocky hills. Can. to Geor. W. to Oregon. April June. 1J- Scape 412 

 inches high. Leaves in a radical spreading tuft. Flowers in rather dense ter- 

 minal cymose clusters, white, with a tinge of purple. Virginian Saxifrage. 



2. S. Pcnnsylvaiiica Linn. : pubescent ; scape naked ; leaves oblan- 

 ceolate or oval, attenuate into a long naked petiole, acute, obsoletely den- 

 ticulate ; cymes in a large oblong panicle ; flowers pedicellate ; petals lance- 

 linear, a little longer than the calyx ; capsule superior. 



Wet grounds. Can. to Virg. W. to Ohio. May, June. 11. Scape 12, 

 sometimes 3 4, feet high. Leaves all radical, 4 8 inches long. Flowers small, 

 greenish-yellow. Pennsylvanian Saxifrage. 



3. S. Walkana Torr. $ Gr. : leaves all radical, membranaceous, ob- 

 long, tapering at base into a short winged petiole, sinuate-toothed, ciliate ; 

 branches of the panicle loosely flowered, from the axils of leaf-like bracts ; 

 sepals nearly distinct, ovate, obtuse, 3-nerved, reflexed, free from the ovary, 

 about as long as the oval obtuse petals. 



On a. mountain near Bethlehem, Penn. Mr. WoUe. Root fibrous. Scape 

 rather slender. 12 18 inches high. Petals small, white, with a yellowish spot 

 near the base. Resembles S. Pennsylvania in habit, but differs in its flowers. 



Woolle's Saxifrage. 



4. . rividaris Linn. : small ; stem weak, ascending, 3 5-flowered ; rad- 

 ical leaves somewhat reniform, crenately lobed, with the petioles dilated at 

 base ; cauline ones lanceolate, nearly entire ; petals ovate, scarcely longer 

 than the calyx ; capsule thick, exceeding the calyx and crowned by the 

 short divergent styles. 



White Mountains, N. H. OaJ:es. N. to Labrador, W. to the Rocky Mountains. 

 ff). Stem about 2 inches high. Flowers white, bracteate. 



L" Alpine-brook Saxifrage. 



f>. SV aizoides Linn. : stems cespitose, leafy ; leaves linear, more or less 

 ciliate, slightly mucronate, thick ; flowers panicled or sometimes solitary ; 

 sepals ovate-oblong, nearly as long as the oblong petals ; stigma depressed ; 

 capsule thick, as long as the styles. 



Wet rocks. Annsville, Oneicla co. N. Y. ; the only locality in the U. S. Torr. 

 N. Y. Fl. N. to J-^ibrador, W. to the Rocky Mountains. Jun?. 9|. Stems 

 numerous, 2-^-4 inches long, spreading. Leaves crowded at the base, scattered 

 above. Flowers in a loose panicle, yellow. Yellow Mountain Saxifrage. 



2. CHRYSOSPLENIUM. Linn. Golden Saxifrage. 



(From the Greek ^pvo-of, gold^ and /irAqi-, spleen ; in allusion to the supposed 

 medicinal virtues of the genus.) 



Calyx adhering to the ovary, the limb of 4 5 obtuse lobes. 

 Petal* none. Stamens S 10. Styles 2. Capsule 2-beaked, 

 2 4-valved, at length 1 -celled, many-seeded. 



C.Americanum Schw. : stem decumbent, dichotomously branched ; leaves 

 opposite, upper ones often alternate, roundish-ovate, slightly rrenate-lobed : 

 flowers diehotomal. distant, sessile. C. oppimiifolvum Mich, not of Linn. 



