144 SAXIFRAGACEJ. (SAXIFRAGE FAMILY.) 



1. B. aconitifolia, Nutt. Stem glandular (6' -20' high) ; leaves deep- 

 ly 5-7-lobed. Mountains of S. W. Virginia, and southward. July. 



4. SUL-L-IVANTIA, Torr. & Gray. SULLI VANTIA. 



Calyx bell-shaped, cohering below only with the base of the ovary, 5-cleft 

 Petals 5, entire, acutish, withering-persistent. Stamens 5, shorter than the pet- 

 als. Pod 2-celled, 2-beaked, many-seeded, opening between the beaks : the 

 seeds wing-margined, imbricated upwards. A low and reclined-spreading pe- 

 rennial herb, with rounded and cut-toothed, or slightly lobed, smooth leaves, on 

 slender petioles, and small white flowers in a branched loosely cymose panicle, 

 raised on a nearly leafless slender scape (6' -12' long). Peduncles and calyx 

 glandular : pedicels recurved in fruit. (Dedicated to the distinguished botanist 

 who discovered the only species. 



1. S. Ollionis, Torr. & Gr. (Gray, ChlorisBor.-Am.,pL.) Limestone 

 cliffs, Highland County, Ohio, Sullivant ; Wisconsin River, Lapham. June. 



5. H E tJC HER A, L. ALUM-ROOT. 



Calyx bell-shaped ; the tube cohering at the base with the ovary, 5-cleft. Pet- 

 als 5, spatulate, small, entire. Stamens 5. Styles 2, slender. Pod 1 -celled, 

 with 2 parietal many-seeded placentae, 2-beaked, opening between the beaks. 

 Seeds oval, with a rough and close seed-coat. Perennials, with the round 

 heart-shaped leaves principally from the rootstock ; those on the scapes, if any, 

 alternate. Petioles with dilated margins or adherent stipules at their base. 

 Flowers in small clusters disposed in a prolonged and narrow panicle, greenish 

 or purplish. (Named in honor of Heucker, an early German botanist.) 



* Flowers small, loosely panicled : stamens and styles exscrted : calyx regular. 



1. II. villosa, Michx. Scapes (l-3 high), petioles, and veins of the 

 acutely 7-9-lobcd leaves beneath vittous with rusty hairs; calyx l" long; petals 

 spatulate-linear, about as long as the stamens, soon twisted. Rocks, Maryland, 

 Kentucky, and southward, in and near the mountains. July, Aug. 



2. H. Americana, L. (COMMON ALUM-BOOT.) Scapes (2 -3 high) 

 &c. glandular and more or less hirsute with short hairs; leaves roundish, with 

 short rounded lobes and crcnate teeth; calyx broad, 2" long, the spatulate petalt 

 not longer than its lobes. Rocky woodlands, Connecticut to Wisconsin and 

 southward. June. 



# * Flowers larger: calyx (3" -4" long) more or less oblique: stamens short : panic?* 

 very narrow : leaves rounded, slightly 5 - 9-lobed. 



3. H. Ill Spifla, Pursh. Hispid or hirsute with long spreading hairs (oc 

 casionally almost glabrous), scarcely glandular ; stamens soon exserted, longer than 

 the spatulate petals. (H. Richardsonii, R. Br.) Mountains of Virginia. Also 

 Illinois (Dr. Mead) and northwestward. May -July. Scapes 2 -4 high. 



4. H. putoescens, Pursh. Scape (l-3 high), &c. granular-pnbescent 

 or fflandular above, not hairy, below often glabrous, as are usually the rounded 

 leaves ; stamens shortei- than the lobes of the calyx and the spatulate petals. 

 Mountains of Penn, to Virginia and Kentucky. June, July. 



