ORDER 45. SAXIFRAGACE^E. 115 



Segm. ovate, acute. Pet. oval-spatulate, twice as long as the calyx. Sta. 

 5, shorter than the calyx. Capsule 2-beaked, 2-celled. Seeds wing-mar- 

 gined, u Lvs. mostly radical, palmate-veined. Fls. in a loose pan., small, wh. 

 S. Ohfonis T. & G. Ohio, Wise. Stem weak, ascending, 612'. Lvs. roundish, cor- 

 date, lobed aud toothed. May, June. 



8. HEUCHERA, L. ALUM ROOT. Calyx of 5 obtuse segm. Cor. 

 of 5 small, entire petals, inserted with the 5 stamens on the throat of the 

 calyx. Cap. 1-celled, 2-beaked, dehiscent between the beaks. Seeds many, 

 with a rough, close testa. H Lvs. radical, long-petioled, petioles with ad- 

 nate stipules at base. 



Fls. small (1 2" long), regular ; stamens and style much exserted Nos. 1 3 



Fls. larger (3 5" long), oblique ; stamens and style short Nos. 4, 5 



1 H. America.na Willd. Viscid-pubescent ; leaves roundish, cordate, somewhat 7- 



lobed; pan. elongated, loose, divaricate; cal. obtuse, short, about equalling the spatu- 

 late petals ; stam. much exserted. Shades, W. and S., rare N. 2 4f. May, June. 



2 H. villosa MX. Villous, with rusty, spreading hairs ; radical Ivs. round-cordate, thin, 



glabrous above, 7-9-lobed ; pan. loose, filiform ; pet. white, about as long and narrow 

 as the filaments. Mts. Md. to N. Car. and Ky. 1 3f. June, July. 



3 H. caulescens Ph. Smooth or nearly so ; Ivs. 5-7-lobed, dentate; pan. loose, slen- 



der ; scape bearing one or two leaves below ; pet. linear-spatulate, twice longer than 

 the calyx. Mts. Car. Tenn. Ky. 1 2f. (II. Curtisii Gr.) 



4 H. pufrescens Ph. Lvs. glabrous, round-cordate, 7-9-lobed ; panicle dichotomous, 



geniculate ; style exserted, stam. included ; pet. white. Mts. Middle States. 



5 H. liispida Ph. Lvs. hispid-rough, 5-7-lobed, lobes very obtuse ; fls. scattered ; pet. 



epatulate, purple ; sta. a little exserted. Mts. S. and prairies W. June. 



9 LEFUROPETALON, Ell. Calyx 5-parted, lobes obtuse, tube tur 

 binate, adherent to the base of the 3-carpelled ovary. Petals 5, minute, 

 spatulate, persistent. Sta. 5, short. Capsule globous, 1-celled, 3-valved, 

 many-seeded. Placentae opposite the stigmas. A minute, succulent 

 herb, growing in tufts. Lvs. entire, dotted. Fls. terminal. 



L. spatula.tum Ell. Hard soils S. Stems scarcely 1'; leaves spatulate, veinless ; fls. 

 large in proportion, white. March, April. 



10. PARNASSIA, Tourn. GRASS OP PARNASSUS. Sep. 5, united at 

 base, persistent. Pet. 5, persistent, with a bundle of sterile fil. at the base 

 of each, and 5 perfect stamens alternating. Caps. 1-celled, 4-valved. Pla- 

 centas opposite the stigmas, in the middle of each valve. Seeds winged 

 U Glabrous. Lvs. radical. Scape 1-flowered, often with one sessile leaf. 

 Pet. white, with green veins. 



1 P. Caroliuia,iia L. Sterile filaments 3 in each group, each with a little round 



head ; pet. sessile; Ivs. broad-oval, rounded at base, one sessile on the scape. Wet 

 meadows. 10 15'. Flower handsome, V broad. June August. 



2 P. asarifolia Vent. Sterile fil. 3 in each set; pet. abruptly clawed; Ivs. renlform. 



Mts. Va. and Car. 1(X. Lvs. large (120- 



3 P. palustris L. Sterile fil. pellucid, setaceous, 9 15 in each set; canline leaf, if 



any, sessile ; radical Ivs. all cordate. Bogs, Mich. N. and W. &. Fls. V. Auguit. 



11. ITEA, L. Calyx small, with 5 subulate segm. Pet. 5, lance-linear, 

 inflexed, inserted with the 5 stam. on the calyx. Styles united. Caps. 2- 



