334 LEGUMINOS^. AstragaLos. 



3-4-flowcred ; pedicels short, bracts linear, half as long as the cylindrical 

 elongated blacki-li hairy calyx. Ilook.Jl. Bor.-Am. 1. p. 152. 



Dry g.avelly banks of rivers ; upper "part of the Oregon lo the mountains, 

 Douglas. A'pri!-May.— Plant about 5 inches high, with dtnstly woolly and 

 •whitish foliage, which the large llowers of its numerous peduncles, of a rich 

 purple-blue color, just exceed in height. The legumes were not obtained. Hook. 



****Sfi'pules cohering neither v-ith each other nor with the petiole : Jloioers in dense 

 spikes or heads : legumes straight : root annual. 



25. A. lep'ocarpus : erect or assurgent, branched from the base, some-what 

 pubescc-nt; leaHets 6-S pairs, cuneate-elliptical, retuse ; stipules lanceolate, 

 acuminate ; peduncles longer than the leaves ; spikes ovate, few-(3-7-) flow- 

 reJ, loose; bracts subulate, rather minute ; calyx campanulate ; the teeth sub- 

 ulate, shorter than the tube ; legumes linear, very narrow, elongated, membra- 

 naceous, glabrous. 2-celled, 11-12-seeded. 



Near the Sabine River, Dr. Leavenworth ! Texas, Drummond! April. 

 — Stem about a foot long, with somewhat spreading branches. Leaflets 4-5 

 lines long, a littl • aairy on the midrib beneath, glabrous above. Flowers deep 

 purplish-blue, half an inch long. Calyx clothed with appressed daik-colored 

 hairs. Vexillum broadly obovate : keel broad, obtuse, with a narroAv furrow 

 along the back.— We have an Astragalus without fruit, collected in California 

 by Douglas, which we can hardly distinguish from this species. 



26. A.refle.vus: assurgent; stem and lower surface of the leaves hairy ; 

 leaflets 6-7 pairs, cuneate-obovate, emarginate; stipules ovate-lanceolate 

 (rather large), acute; peduncles longer than the leaves; spikes ovate, few- 

 6-10-) flovvered, the flowers s[)reading; bracts minute; calyx campanulate, 

 the teeth subulate, longer than the tube; legumes ovate-oblong, rather acute, 

 reflexed, thick and coriaceous, corrugated transversely, glabrous, 2-celled; the 

 upper suture nearly straight and prominently ridgtd, the lower deeply intro- 

 flexed ; cells 3-4-seeded 



Texas, Drummond ! — A foot or more in height, slender, branched. Leaf- 

 lets half an inch long, usually truncate and emarginate. Flowers one-third of 

 an inch long, purplish. Vexillum narrow, elongated: keel obtusely rostrate, 

 much longer than the wings. Legumes one-third of an inch long, somewhat 

 triangular. A remarkable species, resembling Oxytropis in its rostiatekeel; 

 but the legume is that of a genuine Astragalus. 



•*♦♦* Stipules cohering neither xnth each other, nor icith the petiole : f ewers p-urple 

 or white : legumes curved : root annual. 



27. A. Nuttal 11 amis (DC): decumbent or assurgent, minutely pubescent; 

 leaflets 5-7 pairs, linear-oblong or elliptical, the lower ones (maigirate, gla- 

 brous above; stipules lanceolate, acute; peduncles a liiile longer than the 

 leaves; heads 3-8-flowered ; the flowers somewhat umbellate and spnading; 

 bracts minute, ovate, shorter than the pedicfls ; calyx ca^^ panulate. detply 5- 

 cleft; segment; lanceolate, acute; Irgume linf.ar, somewhat aicuate and turn- 

 ed upwards, bicarinate. glabrous, reticulated ; cells B-seeded. — DC. ! pradr. 

 2. p. 289. A. mici-anthus, Nutt.! in jour. acad. Philad. 3. p. 122, not of 

 Desv. 



fi. trirhocarpus : heads 3-5-flowered ; calyx and ovary nearly hispid ; le- 

 gumes hairy. 



Naked pliices in tho prairies of Red River and the Arkansas, KvttaU ! Dr. 

 Leavenworth ! S. 'I'exas, Drummond ! Mav.-June.— Stem 10-18 inches 

 high, branched from the base. Leaflets 4-5 lines long, pubescent with 

 ap'pressed hairs b?neath. Flowers one-third of an inch lorg, blue. Ovary 

 glabrous. Legume 8-10 lines long, and Inline wide, slightly curved towards 



