Stylosanthes. XLVll. LEGUMINOSiE. 229 



4. M. scuTELLATA. Snail. — Ped. 2-flowered; leg. unarmed, cochleate, or- 

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

 of S. Europe. Cultivated among flowers for the curiosity of its pods, which 

 much resemble snail shells. Jul3\ f 



06ff.— 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 



fixed by the middle.'' (T. 6f G.) 



1. A. Canadensis. Canadian Milk Vetch. 



Canescent, erect, difl^use; slip, broad-lanceolate, acuminate; Ifts. O-houi 

 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 ; As. spread- 

 ing, somewhat reflexed ; 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-yellow, in short, dense spikes. Pods \' in 

 length, leathery. Jl. Aug. 



2. A. OBCORDATUS, Ell. 1 



Nearly smooth, procumbent, branched; Ifts. 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 cuned, acute at each end, the lower suture 

 sulcate.— Prairies and bottoms, 111. Metcd ! N. Car. to Flor. Baldwin. Plant 

 but 4 — 6' long, branched at base. Leaves about 3' in length. Leaflets 3 — 6" by 

 1 — li", lower ones roundish. Flowers blue, 4 — 5" long, fruit about 1'. 



22. PHACA. 

 Ch'. (paKrj, lentil, derived from (paydi^ 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. 



1. P. NEGLECTA. Torr. & Gray. 



Erect, branching, nearly smoo'th; Ifts. elliptical, 8 — 13 pairs (5—9, T, & 

 G.); s^i/>. minute ; rac. many-flowered, rather loose; ^^. sessile, smooth, round- 

 ish-ovate, much inflated, with a deep groove at the ventral suture. — By streams 

 and lakes, Western N. Y. to Wiscon. Lopham! Plant resembling Astragalus 

 Canadensis, but more slender and delicate. Stem 1 — 2f high, terete. Leaflets 

 9 — 15" by 3 — 5", minutely pubcrulent 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, very obtuse, terminal one 

 largest; slip, 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. R(Mins! Plant nearly smooth. Stem slender, 

 8 — 14' high. Leaves remote, 2 — \' long. Leaflets 4—8" by IJ — 3", petiolulate! 

 Racemes .surpa.ssing the stem, on peduncles 5 — 10' loiig, 12 — 18-flowered. 

 Corollas white, about 5" long. Pods 1' long, 4— 8-seeded. May, Jn. 



23. STYLOSANTHES. Swartz. 



Gr. ffTvXoi, a style, ap^og, a flower, i. e. a flower with a conspicuoun stylt-. 



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, monadclphous ; ovary 

 always sterile, with a very lon^' styl«v 9 Calyx and rorolla . ovary 



