275 
1. B. Russellianum Griseb, About 3 to6 dm. high: leaves from ovate- to lance- 
olate-oblong: lobes of lavender-purple corolla obovate (3.5 em. long), 4 times longer 
than the tube: anthers hardly curving in age: style elongated: pod oblong, usually 
pointed.—Extending from the northern plains to southern and western Texas. In 
southern Texas is var, GRACILE Gray, which is smaller, with leaves lanceolate and 
capsule not pointed. 
2. EB. silenifolium Salisb. Lower: leaves oblong: corolla-lobes nearly oblong 
(barely 2.5 em. long), twice the length of the tube: style little longer than stigmas: 
pod elliptical-oblong, very obtuse, (EZ. exaltatum Griseb.)—Southern Texas and ad- 
jacent Mexico, 
4. FRASERA Walt. (AMERICAN COLUMBO.) 
Tall and showy herbs, with mostly simple stems bearing whorled 
leaves and numerous peduncled flowers in open cymes disposed in an 
ample elongated panicle, deeply 4-parted calyx, deeply 4-parted rotate 
corolia with each division bearing a glandular and fringed pit on the 
face, awl-shaped filaments usually somewhat monadelphous at base, 
persistent style with 2-lobed stigma, and oval flattened 4 to 14-seeded 
pod with large flat wing-margined seeds. 
1, F. speciosa Doug]. Stem stout, 6 to 15 din. high, very leafy: leaves in 4s and 
6s; radical and lowest cauline obovate or oblong, 15 to 25 em. long; upper lanceolate 
and at length linear: flowers very numerous in a long leafy thyrsus: lobes of green- 
ish white or barely bluish dark-dotted corolla bearing the pair of contiguous and 
densely long-fringed glands about the middle, and a distant transversely inserted 
and setaceously multifid scale-like crown near the base.—A species of the western 
mountains, and reported from Guadalupe Mountains of western Texas. 
5. OBOLARIA L. 
Low and very smooth purplish-green perennial, with opposite wedge- 
obovate leaves, dull white or purplish flowers solitary or in clusters of 
three (terminal and axillary, nearly sessile), calyx of 2 spatulate spread- 
ing foliaceous sepals, tubular bell-shaped withering -persistent 4-cleft 
corolla, short stamens inserted at sinuses of corolla, short persistent 
style with 2-lipped stigma, and ovoid pod with seeds covering the whole 
wall. 
1. O. Virginica L. Herbaceous and rather fleshy: lower leaves scale-like: flow- 
ers 8 mm. long.—Moist woods, extending into Texas from the Atlantic region. 
6. LIMNANTHEMUM Gmelin. (FLOATING HEART.) 
Perennial aquatics, with rounded floating leaves on very long petioles 
which bear near the summit the umbel of flowers (often along with a 
cluster of rootlets), 5-parted calyx, almost rotate 5-parted corolla with 
divisions fringed or bearded at base or margins only and bearing a 
glandular appendage near the base, no style, 2-lobed persistent stigma, 
and a few to many-seeded pod at length bursting irregularly. 
1. L. trachyspermum Gray. Leaves cordate-orbicular, 5 to 15 cm. broad, with 
margins sometimes repand, of thick texture, the discolored lower surface reticulate- 
veined, spongy and pitted: umbel usually destitute of rootlets: expanded corolla 
18mm. broad: seeds roughened.—-Ponds and streams, extending into Texas from 
the Atlantic region. 
18430—No, 2——9 
