lOG leguminos.t:. (pulsk family.) 



* Inner icall of the legume sejHiratiiKjfrmn the outer one (it inaturili/ in the form 



of a membranous stick enclosing the seeds. 



1. S. vesicaria, Kll. Annual, 2*'-10°lii{,^h,filiil)rtiu.s; If.iflctsnniiirrons, 

 1' lonj;, linoar-ulihing, niiuToiiate ; racemes sliorter tlian the leaves, simple or 

 coniitDund ; (lowers small, vclinw ; lej^nine olilong, 1^^' long, 2-seetle(l. ((ilot- 

 tulimn, JJesr.) — Damj) ground near the coast. August. 



* * Inner and outer walls united : suture thick or winged. 



2. S. macrocarpa, Mulil. Annual, .3°- 10° high, glabrous; leaflets very 

 numerous, V- 1' long, oiilong-linear, olduse; racemes short, 1 -4-tlo\vered; 

 Howers yellow, dotted, the vexillum orhicnliU"; legume 6'- 10' long, linear, 

 compressed - 4-angle(l, many-seeded. — Marshes along the coast. August - 

 Sept. 



3. S. punicea, Henth. Trutcsceut, 2°-.')° high ; leallets 10-20, linear- 

 ohlong ; racemes few-flowered ; flowers large, scarlet ; legume oblong, 4-wiuged, 

 few-seeded. — Low ground. Sparingly introduced. 



16. ASTRAGALUS, L. Milk-Vktch. 



Ciilyx 5-toothed ; the 2 upper teeth separated. Vexillum as long as the 

 wings and obtuse keel. Stamens 10, diadeljihous. Legume commonly turgid, 

 few -many -seeded, usually partly or completely 2-celled by the introversion 

 of one or both of the sutures. — Herbs with unequally pinnate leaves, and ax- 

 illary spiked or racemose flowers. 



* Legume partli/ or completely 2-celled bij the introversion of the dorsal suture. 



1. A. Canadensis, L. Tall, pubescent , leaflets 21 -31, oblong, obtuse ; 

 sti]jules (jvate, clasping ; peduncles as long as the leaves, closely many-flowered ; 

 calyx teeth subulate; legume inflated, oval, terete. — Mountains of Georgia 

 and North Carolina. June -August. ^ — Stem 2° -3° high. Leaflets 1'- 

 ly long. Flowers f long, pale yellow. 



2. A. glaber, Michx. Stem tall, iiearly smooth ; leaflets 15 -2.5, oblong- 

 linear, ])ubes(ent l)eneath ; .stipules minute, spreading ; s])ikes longer than the 

 leaves, loo.sely many-flowered ; calyx teeth broad and short ; legume curved, 

 oblong, flattened edgewise. — Dry pine barrens in the mitldle districts. 

 April. 11 — Stem 2° high. Leaflets 6" - 8" long. Flowers white. 



3. A. obcordatus, Ell. Smoothish; stems prostrate; leaflets small, 17- 

 25, obcordate ; peduncles as long as the leaves, loosely^ 8- 15-flowered ; legumes 

 crescent-shaped, compressed, veiny. — Dry sandy barrens in the lower dis- 

 tricts. April -June. ^ — Stems 6'- 12' long. Leaflets 3" -4" long. 

 Flowers i)a]c ])nr])l(>. 



4. A. caryoearpus, Ker. Stems prostrate or ascending, appressed- 

 pubescent ; leaflets 16-24, oblong ; stipules ovate ; peduncles as long as the 

 leaves ; racemes rather loosely flowered ; the flowers violet-purple ; legume 

 ovate, acute, smooth, thick and succulent, corky when dry. — Near Nash- 

 ville, Tennessee (Dr. Gattinger), and westward. 



5. A. Plattensis, Nutt., var. Tennesseensis, Gray. Villous, ca- 

 nescentj stems prostrate or ascending; leaflets about 20, oblong or linear- 



