126 SAXIFRAGACEiE. 



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

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

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

 Big. S. nivalis MuM. 



Rocky hills. Can. to Geor. W. to Oregon. April — June. %.. — Scape 4 — 12 

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

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



2. S. Pewnsylvanica 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. 1i. — Scape 1 — 2, 

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

 greenish-yellow. Pennsylvanian Saxifrage. 



3. S. WolkayiaJTorr. ff« 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-nervtd, 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. Pennsylvanica in habit, but differs in its flowers. 

 . \ Woollens Saxifrage. 



4. S. rivv.laris 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. Oakes. N. to Labrador, W. to the Rocky Mountains. 

 (J). — Stem about 2 inches high. Flowers white, bracteate. 



Alpine-brook Saxifrage. 



5. S. aizoides Linn. : stems cespitose, leafy ; leaves linear, more or less 

 (iliate, slightly mucronate, thick; flowers panicled or sometimes solifary; 

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

 capsule thick, as long as the styles. 



Wet rocks. Annsville, Oneida co. N. Y. ; the only locality in the IT. S. Torr. 

 N. Y. Fl. N. to Labrador, W. to the Rocky Mountains. June. %.. — Stems 

 numerous, 2 — 4 inches long, spreading. Leaves crowded at the ba^e, scattered 

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



2. CHRYSOSPLENIUM. Linn.— Golden Saxifrage. 



(From the Greek xP^<^°i} gold, and aiiKriv^ spleen ; in allusion to the supposed 

 medicinal virtues of the genus.) 



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

 Petals none. Stamens 8 — 10. Styles 2. Capsule 2-beaked, 

 2 — 4-yalved, at length 1 -celled, many-seeded. 



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

 opposite, upper ones often alternate, roundish-ovate, slightly crenate-lobed ; 

 flowers dichotomal, distant, sessile. C. opposihfolium Mich, not of Linn. 



