STYL0SANTIIE3. XLVIJ. LEGUMINOSiE. 2-J9 



4. M. scuTELLATA. Sjiui/. — Pc(l. 2-11owercd; /rir. unarmed, cochleate, or- 

 bicular, convex at the base, flat above, with concentric, sjiiral folds. — (J) Native 

 of S. Europe. Cultivated .'nnon-^ flowers for the curiosity of its pods, which 

 much resenil)le snail .'■hells. July, f 



Obs. — Several other species are eqiiiilly curious witli the ubove, 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 iutroliexion of the lower suture. — 

 Herbaceous or suff'ruticose, unth unequally jnnnate haves. " Hairs often 

 fixed by the middle.'' {T. <^ G.) 



1. A. Canadensis. Canadian Milk Vetch. 



Canescent, erect, difl'u.se ; slip, broad-lanceolate, acuminate ; Ifls. 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 ; .<;y;//e.s- oblong ; Jls. spread- 

 ing, somewhat rcflcxed; leg. ovate-oblong, terete, suberect, smooth, 2-celled, 

 many-seeded, abrupt at the end and tipped with a permanent style. — % River 

 banks, &c., Can to Flor. At the ferry, Niagara Falls! Stem bushy, about 3f 

 high, very leafy. Flowers greenish-)'ellow, in short, den.se spikes. Pods ^' in 

 length, leathery. Jl. Aug. 



2. A. OBCORDATUS. Ell. 1 



Nearly smooth, procumbent, branched; Ifts. 8 — 12 pairs, obcordate or 

 oblong-obovate ; j^cd. 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 

 sulcate. — Prairies and bottoms, 111. Mct<d ! N. Car. to Flor. Baldwm. 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, (paKi], lentil, derived from (jyayo}, to eat. 



Calyx 5-toothed, keel obtuse ; stamens diadelphous (9 & 1) ; legume 

 continuous, turgid, 1 -celled ; placenta swelling, several-seeded. — % 

 Lvs. unequally pinnate. Fls. in axillary^ pedunculate racemes. 



L P. NEGLECTA. Torr. & Gray. 



Erect, branching, nearly smooth ; Ifls. elliptical, 8 — 13 pairs (5—9, T. & 

 G.); .s/?/>. minute ; rac. many-flowered, rather loose ; Zc^'-. 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 — lb" by 3 — 5", minutely puberulent beneath. Flowers white, 10 — 20 in a 

 raceme. Pods about f long, with many small seeds. Jn, Jl. 



2. P. RoBBiNsii, Oakes. 



St. erect, simple, striate; Ifts. 5 — 11, elliptical, ver}^ obtu.se, terminal one 

 largest; stip. triangular-ovate; ped. long, erect, each with a short, ovate or ob- 

 long raceme ; cor. horizontal, twice as long as the cah'x; keel obtuse, shorter 

 than the other petals; Zc^'-. tipped with the recurved, persistent style. — Ledges, 

 banks of Onion River, Vt. Robbins ! Plant nearly smooth. Stem slender, 

 8 — 14' high. Leaves remote, 2 — V long. Leaflets 4—8" by li— 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. 



Gt. crruXo?, a style, arS^of, a (lower, i. c. a flower with a conspicuous style. 



■Flowers of two kinds, d^ 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. 9 Calyx and corolla : ovary 



