224 XLVII. LEGUMINOS. TEPHROSIA. 
petaliferous, barren flowers; radical ped. with apetalous, fertile flowers.—A 
very slender vine, in woods and thickets,Can. and U.S. Stem twining, rough 
backwards, 4—8f in length. Leaflets very thin, 1—3/ long, 3 as wide, lateral 
ones oblique at base. Racemes axillary, few-flowered. Flowers pale purple. 
Cauline legumes smoothish, with 3—4 dark purple seeds. Radical legumes 
often subterraneous, with one large, compressed, brown seed. Jl.—Sept. 
11, ROBINIA. 
In memory of John Robin, herbalist to Louis XIV. 
Calyx short, campanulate, 5-cleft, the 2 upper segments more or 
less coherent; vexillum large; als obtuse; stamens diadelphous 
(9 &1); style bearded inside; legume compressed, elongated, many- 
seeded.—Trees and shrubs with stipular spines. Lvs. unequally pin- 
nate. Els. showy, in axillary racemes. 
1. R. Pseupacacia. Locust Tree. 
Branches armed with stipular prickles; ifts. ovate and oblong-ovate; 
rac. pendulous, smooth, as well as the legumes.—Native in Penn. and the more 
Southern and Western States, and abundantly naturalized in N. Eng. In the 
durability, hardness and lightness of its timber, and the beauty of its foliage 
and flowers, it is exceeded by few trees of the American forest. West of the 
Alleghanies it sometimes attains the height of 80f with a diameter of 3 or 4. 
In N. England it seldom exceeds half these dimensions, The pinnate leaves 
have a beautiful symmetry of form, each composed of 8—12 pairs of leaflets, 
with one at the end. These are oval, thin, nearly sessile, and very smooth. 
Flowers in numerous, pendulous clusters, diffusing an agreeable fragrance. 
Pod narrow, flat, with 5 or 6 small brown seeds. When young, the tree is 
armed with thorns which disappear in its maturity. May. 
2. R. viscosa. Vent. Clammy Locust.—Stipular spines very short; branch- 
lets, petioles and leg. glandular-viscid; Jfts. ovate; rac. crowded.—This beauti- 
ful tree is from the South, where it attains the height of 40f. The flowers 
numerous, rose-colored, in erect, axillary clusters, with the thick, dark green 
foliage, render this tree one of the most brilliant ornaments of the park or the 
garden. Apr. 
3. R. nispipa. Rose Acacia.—Stipular spines althost wanting; shrub mostly 
hispid; vac. loose, suberect.—A beautiful shrub, native of the Southern States. 
It is cultivated in our gardens for the sake of its numerous, large, red flowers. 
Heigkt 3—5f. May. 
6. rosea has its branches nearly smooth. 
12. COLUTEA. 
Calyx 5-toothed ; vexillum with 2 callosities, expanded, larger than 
the obtuse carina; stigma lateral, under the hooked summit of the 
style, which is longitudinally bearded on the back side; legume in- 
flated, scarious.—Shrubs with unequally pinnate leaves. 
C. aRBoRESCENS. Bladder Senna.—Lfts. elliptical, retuse; vex. shortly gib- 
bous behind—A hardy, free-flowering shrub, native of Italy, &c., growing 
almost alone on the summits of Mt. Vesuvius. Stems 8—12f high. Leaflets 
about 9. Flowers large, yellow, with a broadly expanded banner. In medi- 
cine the leaves are used instead of senna. Jn.—Aug. f 
13. TEPHROSIA. 
Gr. repos, ash-colored; in allusion to the color of the foliage. 
Calyx with 5, nearly equal, subulate teeth ; bracteoles 0; vexillum 
large, orbicular; keel obtuse, cohering with the wings; stamens dia- 
delphous (in the following species) or monadelphous ; legume linear, . 
much compressed, many-seeded.—Herbs and shrubs, with unequally 
pinnate leaves. 
