STYLOSANTHES. XLVI. LEGUMINOS£. 229 
4. M. scuTe.Lata. Snail.—Ped. 2-flowered; leg. unarmed, cochleate, or- 
bicular, convex at the base, flat above, with concentric, spiral folds—@ Native 
of S. Europe. Cultivated among flowers for the curiosity of its pods, which 
much resemble snail shells. July. t 
Obs.—Several other species are equally curious with the above, and are sometimes found in our gardens. 
21. ASTRAGALUS. 
Calyx 5-toothed ; keel of the corolla obtuse ; stamens diadelphous 
(9 & 1); legumes 2-celled by the introflexion of the lower suture.— 
Herbaceous or suffruticose, with unequally pinnate leaves. “ Hairs often 
Sized by the middle.” (T. 5 G.) 
1. A. Canapensis. Canadian Milk Vetch. 
Canescent, erect, diffuse; stip. broad-lanceolate, acuminate; /fts. about 
10 pairs with an odd one, elliptical, obtuse at both ends, the lowest ovate-obtuse ; 
ped. about as long as the leaves, when in fruit shorter ; spikes oblong ; /ls. spread- 
ing, somewhat reflexed; leg. ovate-oblong, terete, suberect, smooth, 2-celled, 
many-seeded, abrupt at the end and tipped with a permanent style.—2 River 
banks, &c., Can to Flor. At the ferry, Niagara Falls! Stem bushy, about 3f 
high, very leafy. Flowers greenish-yellow, in short, dense spikes. Pods 3/ in 
length, leathery. Jl. Aug. 
2. A. opcorDitus. Ell. ? 
Nearly smooth, procumbent, branched; /fts. 8—12 pairs, obcordate or 
oblong-obovate ; ped. about as long as the leaves; rac. 6—12 flowered, round- 
ish; leg. oblong, triangular, a little curved, acute at each end, the lower suture 
suleate.—Prairies and bottoms, Ill. Mewd! N. Car. to Flor. Baldwin. Plant 
but 4—6’ long, branched at base. Leaves about 3 in length. Leaflets 3—6” by 
1—1}"”, lower ones roundish. Flowers blue, 4—5” long, fruit about 1’. 
22. PHACA. 
Gr. paxn, lentil, derived from gaya, to eat. 
Calyx 5-toothed, keel obtuse ; stamens diadelphous (9 & 1); legume 
continuous, turgid, l-celled; placenta swelling, several-seeded.—2 
Luvs. unequally pinnate. Fils. in axillary, pedunculate racemes. 
1. P. necuecta. Torr. & Gray. : 
Erect, branching, nearly smooth; /fts. elliptical, 8—13 pairs (5—9, T. & 
G.); stip. minute ; rac. many-flowered, rather loose; leg. sessile, smooth, round- 
ish-ovate, much inflated, with a deep groove at the ventral suture.—By streams 
and lakes, Western N. Y. to Wiscon. Lapham! Plant resembling Astragalus 
Canadensis, but more slender and delicate. Stem 1—2f high, terete. Leaflets 
9—15” by 3—5”, minutely puberulent beneath. Flowers white, 10—20 in a 
raceme. Pods about ?’ long, with many small seeds. Jn. Jl. ; 
2. P. Ropzinsi. Oakes, ~ 
St. erect, simple, striate ; /fts. 5—11, elliptical, very obtuse, terminal one 
largest; stzp. triangular-ovate; ped. long, erect, each with a short, ovate or ob- 
long raceme; cor. horizontal, twice as long as the calyx; keel obtuse, shorter 
than the other petals; leg. tipped with the recurved, persistent style-—Ledges, 
banks of Onion River, Vt. Robbins! Plant nearly smooth. Stem slender, 
8—14’ high. Leaves remote, 2—4’ long. Leaflets 4—8" by 14—3”, petiolulate. 
Racemes surpassing the stem, on peduncles 5—10’ long, 12—18-flowered. 
Corollas white, about 5’ long. Pods 1’ long, 4—8-seeded. May, Jn. 
23. STYLOSANTHES. Swartz. 
Gr. orvios, astyle, aySos, a flower, i. e. a flower with a conspicuous style. ; 
Flowers of two kinds. of Calyx somewhat bilabiate, bibracteolate 
at base, the tube very long and slender, with the corolla inserted on 
its throat; vexillum very broad ; stamens 10, monadelphous; ovary 
always sterile, with a very long style. 2 Calyx and corolla 0; ovary 
