114 ORDER 45. SAXIFHAGACE^E. 



a Calyx entirely free from the ovary (inferior) Nos. 5, 6, 7 



a Calyx adherent to the base of the ovary (half superior) Nos. 8, 0, 10 



Exotic species, cultivated Nos. 11, 12 



1 S. oppositifolia L. Lvs. opposite, obovate, carinate, obtuse, punctate, persist- 



ent J rfls. soliteiry ; cal. free; pet. large, obovate, 5-veined, longer than the stamens. 

 Rocky cliffs, Willoughby Lake, Vt. June. 



2 S. aizoidcs L. Cjespitous, leafy ; Ivs. linear-oblong, thick, flat ; sep. ovate, slightly 



adherent ; pet. oblong, yellow, longer than the sepals ; capsules as long as the styles. 

 With No. l,andN. W. June. 



3 S. rivularls L. St. weak, ascending, 3-5-flowered ; radical Ivs. petiolate, reniform, 



crenately lobed, cauline lanceolate, subentire ; cal. lobes broad-ovate, nearly as Ions 

 as tne white, ovate petals. White Mts. and N. 



4 S. tricuspidata Retz. St. thick, erect; lower Ivs. crowded, oblong, 3-cuspidate ; 



fls. few, large, somewhat corymbed ; sep. thick, ovate, shorter than the oblong-obo- 

 vate, yellow, dotted petals. Lake shores, Can. and N. 



5 S. leiicautliemifolia MX. Viscid-pubescent ; Ivs. radical, spatulate, cut-dentate, 



tapering to a petiole ; scape diffusely paniculate ; calyx free, reflexed ; pet. unequal, 

 white, 3 of them spotted. Mts. S. 18'. 



6 S. erosa Ph. Viscid-pubescent ; Ivs. radical, thin, oblong-lanceolate, acute, with 



erose teeth ; panicle oblong, loose, with luafy bracts ; cal. free, with reflexed, obtuse 

 sepals as long as the equal, obtuse white petals. Mts. Pa. to Car. 15'. 



7 S, Careya.ua Gr. Lvs. round-ovate to deltoid, coarsely dentate, abrupt at base ; 



panicle diffuse ; pet. equal, ovate or oblong, white, dotted, twice longer than the 

 recurved sepals. Mts. S. (and S. Caroliniana Gray). 



8 S. aizoon Jacq. Lvs. spatulate, obtuse, bordered with white cartilaginous teeth, 



and a marginal row of impressed dots ; flowers corymbous paniculate ; pet. obovate, 

 white. Rocky shore?, N. Ver. to Mich, and N. 510'. July. 



9 S. Virginiensis MX. Early Saxifrage. Lvs. spatulate obovate, crenately toothed, 



shorter than the broad petiole ; scape nearly leafless, paniculately branched ; petals 

 white, oblong, much exceeding the calyx. Rocks, common. 412'. April, May. 



10 S. PennsyTvanica L. Lvs. oblong-lanceolate, rather acute, tapering at base, 

 denticulate ; scape forming a diffuse panicle ; fls. pedicellate ; pet. greenish, linear- 

 lanceolate, but little longer than the cal. Wet meadows, N. Eng. to O. 1 2f. May, Ju. 



1 1 S. SAKMKNTOSA. With creeping runners ; leaves roundish ; pet. white, 2 longer thau 

 the other 3 ; scapes naked ; plant hairy. China. Pretty for baskets. 



12 S. CKASSIFOLIA. No runners ; Ivs. thick, oval ; sc. naked ; fls. pk. Siberia. Jn. Jl. 



5. ASTILBE, Don. <$ 5 ? Calyx obconic, with. 4 or 5 erect segments. 

 Pet. 4 or 5, spatulate. St. 8 or 10, exserted. Ov. 2-cellcd. Carpels in. fr. 

 separating and dehiscing lengthwise inside. Seeds 1 4 in each cell. If 

 Coarse, weed-like plants. Leaves bi- or tri-ternate. Fls. small, yellowish- 

 white, in spicate rac. forming a compound panicle (like Spinea Aruncus). 

 A. decaiidra Don. St. tall, angular; Ifts. subcordate, incisely lobed, mucrouate-ser- 



rate ; sterile flowers mostly apatelous ; eta. 10. Mts. South. 4 6f. June August. 



6. BOYKINIA, Nutt. Calyx turbinate, adherent, 5-cleft. Pet. 5, deci- 

 duous. Sta. 5. Ov. 2-celled, 2-beaked. Capsule invested with the calyx, 

 dehiscent between the beaks, if Lvs. alternate, petiolate, palmate. Fls. 

 cymous, white. 



It. aconitifolia Nutt. St. viscid-glanrhilar ; Ivs. smoothish, deeply 5-7-lobed (like 

 those of Aconitum) ; cyme fastigiate, the fls. secuud. Mts. S. 1 2f. July. 



1. SULLIVANTIA, T. & G. Calyx adherent to the base of the ovary 



