436 
BOTA^TY. 
villous often yellow puljescence ; peaunclos long, scape-liko ; spikes dense; flowers rather large, 
violet ; calyx tubular. 
11. A. MOLLissnirs, Torr. Pod narrow-oblong, 5-9" long, glabrous, subaidymous ; ovary also 
glabrous. — Nebraska to W. Texas. 
12. A. BiGELOVii, Gray. Pod oval-oblong, 6" long, coriaceous, densely woolly, but sligbtly sulcate.— 
W. Texas ; New Mexico ; Cbibuabua. 
$ 5. ULIGINOSI. Pod coriaceous, turgid, oblong, terete, scarcely sulcate and only on the back, 
nearly straight, sessile, septum perfect. Perennial, tall, with appressed gray pubescence or glab- 
rate ; spikes dense ; flowers whitish, ochroleucous or purplish, spreading or deflexed ; pods erect, 
crowded, 6" long ; stipules distinct or united, free. 
13. A. Canadensis, L. See pages 67, 68. 
$ 6. ONOBRYCHIDES. Pod coriaceous, oblong or ovate, straight, usually more or less conipressed- 
or obcompressed-triangular, dorsally sulcate, (cross-section obcordate,) 2-cell6d, pubescent, many- 
ovuled. Perennial, caulescent, grayish short-pubescent or glabrate, ascending or decumbent; 
stipules more or less sheathing ; flowers in dense spikes or small heads, middle-sized, violet or pur- 
ple, ascending ; pods ascending. 
14. A. ABSURGEXS, Pall. Eather stout ; spike oblong ; pod sessile. See page 68. 
15. A. HYPOGLOTTis, L. Slender ; flowers capitate ; pod short-stipitate. See page 68. 
i 7. REFLEXI, Pod thick-coriaceous, sessile, deflexed, ovate-triangular, very deeply sulcate dorsally, 
(section obcordately 2-lobed,) 2-celled, cells 3-4-ovuled ; keel falcate, attenuate upward, equal- 
ing the narrow banner, exceeding the wings. Annual, slender, pilose-pubescent ; leaflets emar- 
ginate ; flowers nearly sessile, rather few, subcapitate, bluish-white, spreading. 
16. A. REFLEXUS, T. & G. Flowers scarcely 3" long ; pod 4" long, glabrous.— Texas, (Drummond.) 
§ 8. DIDYMOCAEPI. Pod thin-coriaceous, obcompressed-didymous with a narrow perfect septum, 
transversely ridged or reticulated, at length separating into two 1-2-seeded divisions, mostly de- 
flexed ; ovary short-stipitate. Annual, caulescent, rather small, sparingly pubescent ; stipules 
distinct, nearly free ; leaflets emarginate ; spikes short, dense ; flowers small, violet or whitish, 
keel strongly inflesed. 
17. A. DIDYMOCARPUS, H. & A. Flowcrs sessile ; pod small, strongly rugose, hirsutish, scabrous or 
glabrate ; cells 1-ovnled, nearly filled by the seed ; stipe very short.— California. 
18. A. Brazoensis, Buck. Flowers rather loose, pedicels very short ; pod strongly obcompressed and 
nearly disk-like, 3" broad, incurved, glabrous, transversely nerved ; cells 2-ovuled, mostly l-seeded ; 
stipe equaling the calyx. — W. Texas. 
§ d. MICEANTHI. Pod coriaceous, oblong, lanceolate, or linear, straight or curved, sessile, dor- 
sally sulcate, ventral suture rather prominent, 2-celled, many-ovuled. Low or slender, mostly 
annual, caulescent ; stipules distinct, nearly free ; flowers small or approaching middle-size, violet 
or whitish, keel incurved above or very obtuse; calyx-tube short. — Species dissimilar. 
* Flowers and pods deflexed, numerous, densely spiked ; peduncles elongated; 1° high or mere, 
strigose-puberulent. 
19. A. vaccarum, Gray. Perennial, cinereous-puberulent ; calyx-teeth equaling the tube ; corolla 
incurved, white or purplish ; pod lance-oblong, arcuate, hirsutish, section broad-obcordate. — Arizona. 
20. A. Hartwegi, Benth. Greener ; calyx-teeth shorter than the tube ; corolla nearly straight. — 
Arizona ; Mexico. Pod imknown. 
* * Flowers rather few in a loose raceme, and pods pendent ; low, glabrous. 
21. A. COBRENSis, Gray. Diffuse ; leaflets retuse ; pedicels nearly equaling the calyx-tube ; corolla 
purplish ; ovary short-stipitate ; pod obcompressed, oblong, straight, broadly concave on the back, ses- 
sile. — New Mexico. 
* * * The few capitate flowers and oblong pods erect ; calyx-teeth subulate-linear, much exceeding 
the tube, equaling the corolla. Annual, low, villous-hirsute. 
22. A. Wrightii, Gray. Pod straight, siibcompressed, bicarinate, acute, half-longer than the calyx ; 
style very short. — Texas. 
» * « * Flowers few, subcapitate or subsolitary, rather small, apex of the keel slightly produced, 
inflexed, banner much longer ; pod linear, subcompressed, bicarinate. Annual, low, diffuse ; leaf- 
lets mostly retuse. 
23. A. Nl-TTAixiANrs, DC. Pods curved. See page 68. 
