LEGUMIN(JS^. (^I'ULSK KAMILV.j 61 



§ 2. Pud ovate or (jlobose, inembrarwus, iujlated, near! if t/lahrous, $e$tilr, completely 

 2-ceiied and more or less didi/iuous by the intrusion of both sutures, many- 

 set ded. — Stipules distinct, adnatf : flowers spicale. 



4. A. diphysus, (Jniy. Nc'iirly i^hilirous tlin.ui^^lioui : l«-:iHcti* 6 to 1 1 

 pairs, obovute or ol)loiig : llowcrs hlue or purple, octiusioiKillv while : ptxl 

 curved-acuminate, fro(|noiitly mottled — S. W. Colorado, Kouthward, uiid 

 westward in the Great Basin. 



§ 3. Pod cartilaginous or coriaceous, sessile, oblonr/, turt/id, (errtr, smntte at txAh 

 sutures, at length incurved, completely 2-relled. — Snharaulesrrnt, shining icith 

 a soJ\ silky-villous often yellow pubescence : jiedunclcs lung, scapt-ULe : spikes 

 dense : flowers violet. 



5. A. moUissimUS, Torr. Pod narrow-oblong, 5 to 9 lines l(»ng, gla- 

 brous, sul»iii«l\ iiiDUs : uvury also glabrous. — From Colorado to Nebnuska and 

 W. Texas. 



6. A. Bigelovii, Gray. Pod oval-oblong, G lines long, densely woolly, but 

 slightly sukate. — From S. W. Colorado to Texas and Mexico. 



§ 4. Pod coriaceous, turgid, oblong, terete, scarcely sulrate and only on the back-, 

 nearly straight, sessile, completely 2-celled. — T(dl, with appressed grai/ pu- 

 bescence or glabrate: spikes dense: flowers whitish, ochroleurous or purplish: 

 stipules disfi)irt or united, free. 



7. A. Canadensis, L. Leaflets lO to 14 pairs, elliptical or oblong, ol>- 

 tuse : pod and ovary glabrous. — From Colorado to the head-waters of the 

 Columbia and Saskatchewan, and eastward to the Atlantic States. 



8. A. Mortoni, Xutt. Differs from the last in the .somewhat pubescent 

 ovary and pod, and tlie latter more decidedly sulcate dorsally and lc.>is crowde<l 

 in the matured spike, and the leaflets G to S pairs. — .1. Canadensis, var. 

 Mortoni, Watson. Head-waters of the Missouri an<l Platte, we.stw:ir(l into 

 Utah, Nevada, and California. 



§ 5. Pod coriaceous, oblong or ovate, straight or slightly curved, usually more or 

 less compr€ssed-trian(pilar, dor sally sulcate {cros.'i-section obcordate), romj>letely 

 2-celled, pubescent. — Caulescent, grayish short-pubescent or glabrate : stipules 

 more or less .sheathing. 



9. A. adsurgens, Pall. leather stout: spikes at length oblong or cylin- 

 drical : flowers pur jtHsh : pod sessile. — From CcdoratU) to Oregon, Nobra.'*ka, 

 and the Saskatchewan. 



10. A. terminalis, Watson. Slender: leaves long-petinlatr : mccmc an 

 inch long, open, long-jxdunculate: flowers nearly .sessile, r« flexed, purplish: 

 pod sessile, strnlglit, cn'ct. — Proc. Am. Acad. xvii. 370. S. Montana. 



11. A. hypoglottis, L. Slender : flowers capitate, vioUt: pod sdky-vil- 

 lous, very shortly .st'pitate. — From S. Colorado northward Jilong the mttuntain.H 

 and lied Hiver Valley to Alaska and the Arctic Circle. 



12. A. ventorum, Gray. Stems y/cn/oH.-!, 4 to 6 inches hi;;h. ."imple : 

 leaflets broadly obovate : raceme loose, short- ped uncled, ecjualling the leaves; 

 flowers light yelln,r: pod sessile, slightly curved. — Watson in Am. Nalunilisl, 

 viii. 212. Wind I liver, Wyoming, Parry. 



