Heuchera. LXV. SAXIFRAGACEiE. 279 



2. Pennsylvanica. Tall Saxifrage. 



Lvs. radical, oblong-lanceolate, rather acute, tapering at base, denticulate; 

 scape nearly leafless ; branches alternate, with close cymes forming a diffuse 

 paaicle ; fls. pedicellate ; pet. linear-lanceolate, but little longer than the calyx. 

 — Larger than the foregoing, common in wet meadows, Me. to Ohio. Leaves 

 fleshy, pale green, 5 — 8' by 1 — 2', on a broad petiole. Scape 2 — 3f high, gross, 

 hollow, hairy and viscid, branched into a large, oblong panicle of yellowish 

 green flowers of no beauty. May. 



3. S. AizooN. Jacq. 



Lrs. mostly radical, rosulate, spatulate, obtuse, with cartilaginous, white 

 teeth, and a marginal row of impressed dots ; Jls. corymbose-paniculate ; cat. 

 (avidipcd. glandular- viscid) tube hemispherical, as long as the 5-toothed limb; 

 pet. obovate ; sty. divergent, longer than the calyx. — Southern shores of Lake 

 Sup. {Pitcher, in T. & G. L p. 566) on shady, moist rocks. Stem 5 — 10' high. 

 Fls. white. Jl. 



4. S. AIZOiDES. 



Casspitose, leafy ; lvs. alternate, linear-oblong, more or less ciliate, slight- 

 ly mucronate, thick, flat, mostly persistent ; Jloivcring stevis annual ; fis. panicu- 

 late, sometimes solitary ; sep. ovate, slightly coherent with the ovary ; pet. ob- 

 long, longer than the sepals ; stigmas depressed ; caps, rather thick, as long as 

 the styles. — In the clefts of rock-s, Willoughby Mt., Westmore, Vt. 500f above 

 W. Lake, Wood, N. to the Arctic sea. Barren stems short, with densely crowded 

 leaves ; flowering ones ascending, 2 — 4' long, with scattered leaves. Leaves 

 4 — 6" long, about 2" wide. Pedicels bracteate. Flowers yellow, dotted. 



5. S. OPPOSiTiFOLiA. Opposite-leaved. Saxifrage. 



Lvs. opposite, rather crowded, obovate, carinate, ciliate, obtuse, punctate, 

 persistent; fls. solitary; cal. free from the ovary; pet. large, obovate, 5-veined, 

 longer than the stamens. — In the same locality as the above, Wood. Stems 

 purplish, very branching and diffuse. Leaves bluish-green, 1 — 2" in length, 

 narrowed and clasping at base. Flowering stems annual, 1 — 3' long. Flow- 

 ers light purple, large and showy. 



Obs.—l discovered this and the foregoing species in the above localitj-, in Aug. 1845, when they had 

 passed flowering. 



6. S. RIVULARIS. 



St. weak, ascending, 3 — 5-flowered; radical lvs. petiolate, reniform, cre- 

 nately lobed ; cauline lanceolate, subentire ; calyx lobes broad-ovate, nearly as 

 long as the ovate petals, but much shorter than the thick, short-beaked capsules. 

 — White Mts., N H., Oakes, N. to Arc. Am. A very small species, with white, 

 bracteate flowers. Stems about 2' high, annual, with alternate leaves. 

 2. SULLIVANTIA. Torr. 

 In honor of Wm. S. Sullivant, author of Musci Alleghanensis, &c. 



Calyx campauulate, coherent with the base of the ovary ; segments 

 ovate, acute ; petals oval-spatulate, unguieulate, inserted on the sum- 

 mit of the calyx tube, and twice as long as its lobes ; stamens 5, in- 

 serted with the petals, shorter than the calyx ; capsule 2-beaked, 2- 

 celled ; seeds 00, ascending ; testa wing-like, not conformed to the 

 nucleus. — % Lvs. mostly radical, falmate-veiwA. Fls. in a loose pani- 

 cle, small, white. 



S. Ohionis. Torr. 



A diffuse, weak-stemmed plant, first discovered in Highland Co., Ohio ! 

 by him whose name it bears. Stem annual, very slender, 8 — 16' long, ascend- 

 ing, glandular. Radical leaves roundish, cordate, lobed and toothed, 1 — 2' 

 diam., on long petioles. Cauline leaves mostly very small, bract-like, cuneate 

 at base, 3 — 5-toothed at summit. Ma}", Jn. 



3. HEUCHfiRA. 



In honor of Prof Heucher, botanic author, Wittemberg, Germany. 



Calyx 5-cleft, coherent with the ovary below, segments obtuse ; co- 



24* 



