PEA FAMILY 567 



Plants cespitose, the stems 2-30 cm. long. 



Leaflets densely white-silky; stems seldom over 5 cm. long. 101. A. platytropis. 



Leaflets sparsely strigose or glabrous; stems mostly 10-30 cm. long. 

 Pods glabrous; leaflets glabrous or nearly so, obovate, flat. 



Pods firm coriaceous, 25-30 mm. long, arcuate; corolla 12-15 mm. long. 



102. A. araneosus. 



Pods thin and papery, subglobose, not strongly arcuate; corolla 10 mm. long. 



103. A. salinus. 

 Pods strigose, rather firm (see also A. araneosus). 



Leaflets not conduplicate, glabrous or very sparsely strigose; pods ovoid, strongly arcuate. 



104. A. lentiginosus. 



Leaflets conduplicate, rather crowded, sparsely strigose, at least below. 



Flowers white or ochroleucous; pods ovoid, only slightly arcuate, thin. 



105. A. ineptus. 



Flowers purple; pods oblong-lanceolate, strongly arcuate, firm-coriaceous. 



106. A. idriensis. 



XII. Hamosa. 



Annual or perennial plants with decumbent or tufted stems; calyx short-campanulate, the teeth subulate; 

 corolla usually purplish, the standard with a rather broad, erect blade, the wings usually longer than the keel; 

 pods linear, laterally flattened, membranous, completely 2-celled by the intrusion of the lower suture; seeds 

 numerous. 



Perennials with a cespitose caudex or rootstock. 

 Pods linear or linear-oblong, 15-40 mm. long. 

 Pods villous. 



Calyx black-hairy; pods 25-40 mm. long; corolla purple or purple-tipped. 



Pubescence spreading; pod moderately arcuate, acute or short-acuminate. 



107. A. malacus. 



Pubescence ascending or appressed; pod strongly arcuate. 108. A. Layneae. 



Calyx white-hairy; pod about 15 mm. long; corolla white or ochroleucous. 



109. A. Andersonii. 

 Pods strigose or glabrous. 

 Pods glabrous. 



Calyx-tube cylindric-campanulate, 6-7 mm. long, much longer than the teeth; corolla 15 mm. 

 long. 110. A. succumbens. 



Calyx-tube campanulate, less than 5 mm. long, about equaled by the teeth; corolla 10 mm. long 

 or less. 



Wing petals 2-lobed; plants acaulescent, densely silvery. 111. A. calycosus. 



Wing petals entire; plants leafy-stemmed, canescent or glabrate. 



Stem and leaves glabrous or nearly so. 112. A. umbraticus. 



Stem and leaves pubescent. 



Pods not sulcate dorsally; corolla purple. 113. A. bernardinus. 



Pods broadly sulcate on the back, triangular in cross-section; corolla white. 



114. A. tricarinatus. 

 Pods strigose. 



Leaflets sparsely strigose below, glabrate above. 115. A. drepanolobus. 



Leaflets canescent or silky. 



Calyx more or less black-hairy; corolla white, about 15 mm. long. 



116. A. Congdonii. 



Calyx white-hairy; corolla purple, 8 mm. long. 117. A. albens. 



Pods lanceolate, less than 10 mm. long, tapering from near the base to an acuminate apex. 



118. A. Clevelandii. 

 Annuals. 



Keel obtuse, not beaked. 



Calyx black-hairy; corolla 7-10 mm. long. 



Pods less than 2 cm. long. 



Pods 4 mm. wide, glabrous; inflorescence short-racemose. 119. A. Bruceae. 



Pods 2 mm. wide, strigose or rarely glabrous; inflorescence subcapitate. 



120. A. tener. 

 Pods 2.5-6 cm. long. 



Pods 2.5 cm. long, strongly arcuate and spreading. 121. A. Clarianus. 



Pods 3.5-6 cm. long, straight or only slightly arcuate, ascending. 



122. A. Rattanii. 



Calyx white-hairy; corolla 4-6 mm. long. 123. A. austrinus. 



Keel produced into a porrect beak. 124. A. acutirostris. 



XIII. Hesperonix. 



Cespitose perennials with woody rootstocks, the stems decumbent or ascending; calyx campanulate, the lobes 

 subulate: pods stipitate, coriaceous, completely 2-celled, the lower suture little or not at all sulcate; septum formed 

 by the lower suture extending to the upper. 



Pod and stipe distinctly curved, thin-coriaceous. 125. A. Bolanderi. 



Pod straight and not recurved on the stipe, thick-coriaceous. 

 Body of the pod 8-20 mm. long. 



Pod pubescent, the body 8-15 mm. long. 126. A. accidens. 



Pod glabrous, 15-20 mm. long, somewhat fleshy, becoming strongly wrinkled when dry. 



127. A. Watsonii. 

 Body of the pod 30-40 mm. long; leaflets villous on the margins and midrib. 128. A vallaris. 



