PEA FAMILY 565 



Pod rounded and mucronate or merely acute at apex. 

 Pod ellipsoid, broadest near the middle. 



Corolla ochroleucous or white, stems usually over 3 dm. high (except A. trichopodus). 

 Stipe of the pod well exceeding the calyx. 



Corolla twice as long as the calyx or less; leaflets elliptic to broadly linear. 



Leaflets pubescent on both surfaces; corolla 12-15 mm. long; pods usually stri- 

 gose. 

 Leaflets appressed-silky-pubescent on both surfaces; stipe about two-thirds 



the length of the body of the pod. 41. A. asymmetricus. 



Leaflets loosely white-villous; stipe less than half the length of the body of 

 the pod. 42. A. leucopsis. 



Leaflets glabrous above; pods glabrous. 43. A. trichopodus. 



Corolla three times as long as the calyx; leaflets narrowly linear. 



44. A. Cusicku. 



Stipe of the pod not exceeding the calyx-lobes. 45. A. curtipes. 



Corolla purple; plants cespitose, usually less than 3 dm. high. 



Pod 40 mm. long; corolla 14-16 mm. long; leaflets glabrous. 



46. A. oophorus. 



Pod 20-25 mm. long; corolla 8-10 mm. long; leaflets strigose. 



47. A. nutans. 



Pod distinctly obovoid, narrowed from near the rounded apex to the stipe; cespitose plants. 



48. A. Whitneyi. 

 Pods sessile. 



Pod ellipsoid, rarely somewhat ovoid or with the upper suture straight but if so, both sutures rounded. 

 Pods 2 or more cm. long. 



Racemes lax; banner obovate, strongly arched. 



Calyx-lobes deltoid, one-fourth to one-third the length of the tube. 



Pod rather firm, 20-25 mm. long, broadest near the base, glabrous. 



49. A. oocarpus. 



Pod thin, papery, 35-50 mm. long, broadest at or near the middle. 



Leaflets 10-25 mm. long; flowers greenish yellow. 50. A. Parishii. 



Leaflets 2-6 mm. long; flowers purple. 51. A. Peirsonii. 



Calyx-lobes lanceolate-subulate, one-half to fully as long as the tube. 



Plants strigose or glabrate; calyx-teeth 2 mm. long. 52. A. Douglasii. 



Plants more or less white-villous; calyx-teeth about 4 mm. long. 



53. A. macrodon. 



Racemes dense; banner oblong-obovate, moderately arched; plants more or less villous. 



Pods strigose or glabrous. 



Plants green and glabrous or nearly so, often prostrate. 54. A. pomonensis. 



Plants more or less villous, erect or decumbent at base. 55. A. Menziesii. 



Pods densely tomentose with short kinky hairs. 56. A. miguelensis. 



Pods 1 cm. or less in length. 57. A. microcystis. 



Pod obliquely ovoid, the upper suture usually acute, straight or only slightly convex, less than 2 cm. long. 



Annuals or short-lived perennials from a slender taproot and without a woody caudex. 



Racemes few-flowered, barely equaling the leaves. 



Pubescence of the pod appressed or none. 



Pods thinly strigose. 



Leaflets obovate; perennial. 58. A. diurnus. 



Leaflets linear to linear-oblong; annual. 



Calyx white-hairy. 59. A. Geyeri. 



Calyx black-hairy. 60. A. chuckwallae. 



Pods densely white-strigose; annual. 



Flowers white; pods narrowly ovoid, 5-6 mm. wide. 



61. A. aridus. 

 Flowers purple; pods broadly ovoid, 8-11 mm. wide. 



62. A. Harwoodii. 



Pubescence of the pod long-villous and spreading. 63. A. sabulonum. 



Racemes many-flowered, about twice as long as the leaves; corolla dark purple; plants canescent. 



64. A. vaseyi. 



Perennials, cespitose or, if tall, with a more or less woody base and root. 



Plants cespitose; racemes few-flowered; pod villous. 65. A. Pulsiferae. 



Plants not cespitose; racemes densely flowered. 



Pod glabrous; leaves canescent. 66. A. pychnostachyus. 



Pod short-villous; leaves glabrous. 67. A. Hornii. 



Pods firm and leathery, splitting into 2 valves at the apex when ripe. 



Stipe evident, 5-6 mm. long. 68. A. Preussii. 



Stipe scarcely evident, 1-2 mm. long; leaflets broadly obovate. 69. A. Crotalariae. 



VII. Atelophragma. 



Caulescent perennials, with rootstocks; stipules nearly distinct; calyx campanulate, the lobes subulate; pod 

 membranous or papery, more or less compressed laterally, usually stipitate, the lower suture intruding and form- 

 ing a partial partition. 



Pods glabrous. 



Leaves loosely and densely villous on both sides; pods 8-12 mm. wide. 70. A. Cottonii. 



Leaves rather densely strigose below, glabrous above; pods 4-5 mm. wide. 71. A. Forwoodii. 

 Pods black-hairy. 



Pods 10-14 mm. long, sulcate on lower suture. 72. A. alpinus. 



Pods 18-22 mm. long, not sulcate on lower suture. 73. A. Macounii. 



