HEBCHBRA. LXV. SAXIFRAGACEJS. 279 



2. PENNSYLVANIA. Tall Saxifrage. 



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

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

 panicle ; 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. 



Lies, mostly radical, rosulate, spatulate, obtuse, with cartilaginous, white 

 teeth, and a marginal row of impressed dots ; fls. corymbose-paniculate ; col. 

 (and ped. 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. 1. p. 566) on shady, moist rocks. Stem 5 10' high. 

 Fls. white. Jl. 



4. S. AIZOlDES. 



Caespitose, leafy ; Ivs. alternate, linear-oblong, more or less ciliate, slight- 

 ly mucronate, thick, flat, mostly persistent ; flowering stems annual ; fls. 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 rocks, 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. I discovered this and the foregoing species in the above locality, in Aug. 1845, when they had 

 passed flowering. 



6. S. RIVULARIS. 



St. weak, ascending, 3 5-flowered; radical Ivs. 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 campanulate, coherent with the base of the ovary ; segments 

 ovate, acute ; petals oval-spatulate, unguiculate, 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. ^J- Lvs. mostly radical, palmate-veined. Fls. in a loose pani- 

 cle, small, ichite. 



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, 12' 

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

 at base, 3 5-toothed at summit. May, Jn. 



3. HEUCHfiRA. 



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



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



24* 



