144 SAXIFRAGACEJE. (SAXIFRAGE FAMILY.) 



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

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



4. SULLIVABfTIA, Torr. & Gray. Sullivantia. 



Calyx bcll-shapcd, cohering below only with the base of the ovary, 5-cleft 

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

 als. Pod 2-cclled, 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, o-i 

 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. Ohionis, Torr. & Gr. [Gray, Clitoris Bor.-Am., pi. 6.;— Limestone 

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



5. 13 El CHER A, L. Alum-koot. 



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 placental, 2-bcaked, 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 Heucher, an early German botanist.) 



* Flowers small, loosely panicled : stamens and styles exserted: calyx ret/alar. 



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

 acutely 7-9-lobed leaves beneath villous with rusty hairs; calyx H" 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. II. Americana, L. (Common Alum-root.) Scapes (2° -3° high) 

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

 short rounded lobes and crenatc teeth ; calyx broad, 2" long, the spatulate petals 

 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 : panicle 

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



3. H. HiSpida, Pursh. Hispid or hirsute with long spreading hairs (o(. 

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

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

 Illinois {Dr. Mead) and northwestward. May - July. — Scapes 2° - 4° high. 



4. H. pubescens, Pursh. Scape (l°-3° high), &c. granular-pubescent 

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

 leaves ; stamens slwrter than the lobes of the calyx and the spatulate petals. — 

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



