Astragalus. 



LEGUMINOS^. 



145 



26. A. MALACUS. 



27. A. Andersonii. 



Stipe half shorter : pod acute at base. 

 Stipe a (quarter of an inch long, half the length of the pod. 

 Sessile in the calyx, bladdery, an inch or two long, many-seeded. 

 Corolla pale yellow, short and broad : stipules herbaceous. 

 Corolla white or whitish, narrow, an inch long : stipules scarious. 

 Stipules distinct : pod rather firra-walled. 

 Stipules united opposite the petiole : pod thin-bladdery. 

 Corolla yellowish-wliite or cream-color, 4 lines long, hardly twice 

 the length of the calyx. 

 Herbage villous when young : calyx-teeth a& long as the tube. 

 Herbage puberulent when young : calyx-teeth shorter than tube. 22, 

 Sessile in the calyx, half an inch long : flower a quarter-inch long. 

 Nearly glabrous : pods capitate, ovate, acuminate, 10-15-sceded 

 Villous : pods few, ovate-incurved, 3 - 8-seeded. 



++ ++ Pod coriaceous or cartilaginous, or cliartaceous, not bladdery-inflated, 



= Long-woolly or long-hairy, sessile in the calyx, many-seeded. 



Plant white with soft wool, very low : pod densely woolly. 25. A. PuRSini 



Plant and pods long-hairj% taller. 



Plant and pods downy with short hairs, slender. 



= = Pod glabrous or pubescent with short hairs. 



Pod conspicuously stipitate, the stipe equalling or surpassing the calyx, 

 One-celled, both sutures prominent externally. 



Calyx very olilicpiely attached to the pedicel and recurved on it : 

 pod curved or coiled, rigid. 

 Herbage soft-downy : pod pubescent. 

 Herbage minutely pubescent : pod glabrous. 

 Calyx not oblique : pod straight, thinner-walled, linear-oblong. 

 Almost glabrous : pod obtuse at base ; stipe half an inch long. 

 Hoary-pubescent : pod tapering into a stipe a quarter-inch Ion: 

 Glabrous : stipe 2 lines long. 

 Two-celled by intrusion of the dorsal suture, turgid. 

 Narrowly oblong, straight, erect. 

 Ovate, incurved, reflexed on the stipe. 

 Pod very short-stipitate in the calyx, pendulous, oblong-linear, straight. 40, 

 Pod sessile in the calyx or nearly so, and exceeding it. 

 Stems a span to a foot or more high. 



Flowers an inch long, few : pod oval, 1-celled. 

 Flowers one third to two thirds of an inch long, 

 Few or scattered in the spike. 



Pod flattened fore and aft, wing-margined. 

 Pod more or less flattened or narrower fore and aft, marginless, 

 curved at maturity. 

 I;eaflets 5 to 15, linear, scattered, hoary -pubescent. 

 Leaflets 11 to 21, crowded, 



Obovate or roundish, loosely pubescent or glabrous : 



flowers jiurple. 

 Oblong or obovate, minutely silvery-silky : flowers white. 39. 

 Pod terete with a groove on the back, narrow, straight, 

 Short-stipitate in the calyx, not erect. 

 Not at all stipitate, erect. 

 Many flowers and pods crowded in a dense spike. 

 Pods oblong, obtuse, 2 -celled, many-seeded. 

 Pods ovate, acute, lenticular, 1-celled, 2 - 5-seeded. 

 Flowers and few-seeded 2-celled pods only 2 or 3 lines long. 



Herbage and turgid pods minutely pubescent ; the latter grooved 



on the back. 

 Herbage and laterally flatfish pods very pubescent. 

 Stems or rootstocks not rising from the ground : leaflets few : scape 

 few-flowered : pod small. 

 Pod sessile in and shorter than the calyx, few-seeded. 



* * Leaflets prickly pointed and rigid, persistent. 

 Peduncles very short, 1 - 3-flt)wered : pod very small, 1 -4-seeded. 48. A. Kentropiiyta. 



