SAXIFRAGACEJE. (SAXIFRAGE FAMILY.) 149 
merely at the base, divergent. — Exposed rocks, common. April - 
June. — A well-known and pretty species: tips of the calyx and fruit 
purplish. 
5. S. Pennsylvdllica, L. (Swamp Saxifrage.) Large; 
leaves oblanceolate , obscurely toothed , narrowed at the base into a short 
and broad petiole; cymes in a large oblong panicle, at first clustered; 
lobes of the nearly free calyx recurved , about the length of the linear - 
lanceolate ( greenish) small petals; filaments awl-shaped ; pods at length 
divergent. — Bogs, common. May, June. — Leaves 4' - 8 ; , the scape 
at length 2? long. A homely species. 
6. S. erosa, Pursh. (Lettuce Saxifrage.) Leaves oblong or 
oblanceolate , obtuse , sharply toothed , tapering into a margined petiole ; 
scape slender; panicle elongated, loosely flowered, pedicels slender ; 
calyx reflexed , entirely free, nearly as long as the oval obtuse {white) pe¬ 
tals ; filaments club-shaped; pods 2, nearly separate, diverging. (S. 
Wolle&na, Torr. Gr .) Cold mountain brooks, Penn, (near Beth¬ 
lehem, Mr. IVolle), and throughout the Alleghanies southward. June. 
— Leaves 8'-12 f , the upright scape high. 
2. SULLIVANTIA, Torr. & Gr. Sullivantia. 
Calyx bell-shaped, cohering below with the base of the ovary, 
5-cleft. Petals 5, entire, acutish. Stamens 5, shorter than the 
petals. Pod 2-celled, 2-beaked, many-seeded, opening between 
the beaks : the seeds wing-margined, imbricated upwards. — A 
low and reclined-spreading perennial herb, with rounded and cut¬ 
toothed, or slightly lobed, smooth leaves, on slender petioles, and 
small white flowers in a branched loosely cymose panicle on a 
nearly leafless slender scape. Peduncles and calyx glandular: 
pedicels recurved in fruit. (Dedicated to the distinguished bota¬ 
nist who discovered it.) 
1. S. Ollionis, Torr. & Gr. ( Gray , Chloris Bor. -Jim ., tab. 6.) 
— Limestone cliffs, Highland County, Ohio. June. Scapes 8'-12' 
long. Leaves 2' across. 
3. HE U CHER A, L. Alum-root. 
Calyx bell-shaped, cohering at the base with the ovary, 5-cleft. 
Petals 5, spatulate, small, entire, erect. Stamens 5. Styles 2. 
Pod 1 -celled, with 2 parietal many-seeded placentae, 2-beaked, 
opening between the beaks. — Perennials, with the round heart- 
shaped leaves principally from the rootstock ; those on the scapes, 
if any, alternate. Flowers in small clusters disposed in a prolong- 
13* 
