GENTIANACEJE, (GENTIAN FAMILY.) 357 
of the valves. — Small annual herbs, with erect filiform stems, scale-like subulate 
leaves, and white flowers. 
1. B. verna, Muhl. Stem (2'- 6' high) simple or sparingly branched, suc- 
culent, few-flowered ; calyx-lobes lanceolate-subulate, one third as long as the 
oblong or obovate obtuse spreading white lobes of the corolla; anthers oblong ; 
capsule roundish. (Centaurella verna, Michz.) — Damp pine barrens near the 
coast, Florida to North Carolina. Feb.- April. 
2. B. tenella, Muhl. Stem (6/-12' high) branched; the branches, like 
the leaves, opposite or alternate, many-flowered ; calyx-lobes subulate, as long 
as the tube of the greenish-white corolla; lobes of the corolla erect, acute; 
anthers globose ; capsule oblong-lanceolate. (Centaurella paniculata, Michx.) — . 
Swamps, Florida to Mississippi, and northward. Sept. and Oct. — Flowers 
much smaller than in No. 1. 
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5. OBOLARIA, L. 
Cale of 2 spatulate bract-like sepals. Corolla bell-shaped, 4-cleft, imbricattd 
in the bud. Stamens 4: anthers round-cordate. Style short: stigma 2-lipped. 
Capsule ovoid, l-celled. Seeds numerous, covering the valves. — A low spar- 
ingly branched perennial herb, with opposite wedge-obovate ine and den or 
clustered axillary and terminal purplish flowers. 
1. O. Virginica, L. — Rich shady woods, South Canine iid tadili. 
March and April. — Plant smooth, purplish, 3’-8’ high. Branches gentrally 
3-flowered. 
6. FRASÉRA, Walt. AMERICAN COLUMBO. 
Calyx 4-parted. Corolla wheel-shaped, 4-parted, the lobes each with a de- 
pressed fringed gland on the upper face. Stamens 4: anthers nodding. Style 
persistent : stigmas spreading. Capsule compressed. Seeds few, large, winged, 
borne on the margins of the valves. — Tall and smooth perennial herbs, with 
whorled or opposite sessile leaves and branches, and cymes of greenish-yellow 
flowers, disposed in a large terminal panicle. 
1. F. Carolinensis, Walt. Stem (3? - 8? high) erect ; leaves and branches 
mostly four in a whorl, lance-oblong, the lowest spatulate; panicle pyramidal ; 
corolla-lobes oblong, mucronate, dotted with purple. — Rich soil in the upper 
districts of Georgia, and northward. July.— Lowest leaves PT Corolla 
l'wide. Root large and bitter to the taste. 
7. LIMNANTHEMUM, Gmel. 
RS 5-parted. Corolla wheel-shaped, 5-parted, the lobes infolded in the bud, 
ciliate, and glandular-crested at the base. Stamens 5. Style short or none: 
stigma 2-lobed, persistent. Capsule 1-celled, opening irregularly. Seeds few or - 
many. Testa woody. — Perennial aquatic herbs, with floating circular or cor- 
“date spongy leaves. and white rer nanea T 
