566 FABACEAE 



VIII. Phacomene. 



Cespitose perennials; corolla large; pod short-stipitate, papery or rather leathery, inflated, acute at each end, 

 the upper suture acute, the lower flat or slightly sulcate; septum incomplete, usually narrow and not extending to 

 the apex. 



Corolla ochroleucous; pods tapering at each end; calyx-teeth 5-6 mm. long, equaling the tube. 



74. A. weiserensis. 



Corolla purple; pods ovoid, abruptly narrowed to the strongly curved stipe; calyx-teeth 2 . 5-3 mm. long, shorter 

 than the tube. 75. A. cimae. 



IX. TlUM. 



Perennial herbs; flowers in racemes; calyx campanulate, the teeth nearly equal; corolla purple, white or 

 ochroleucous, banner with a broad erect blade; pod linear or oblong, tapering at each end, more or less stipitate, 

 usually membranous, 1 -celled, obcordate or inverted V-shaped in cross-section, the dorsal suture strongly sulcate, 

 rarely with a narrow partial partition. 



Pods pendulous, linear or linear-lanceolate in outline. 



Pods distinctly stipitate, compressed, deeply but narrowly sulcate on the lower suture. 



Pods nearly straight, including the stipe 40-50 mm. long, long-acuminate; corolla 12-14 mm. long. 



76. A. Arthurii. 

 Pods distinctly arcuate, 20-30 mm. long, including the stipe. 



Plant glabrous or sparingly short-villous. 



Corolla white or ochroleucous; pod 3-4 mm. wide. 



Leaflets short-villous on both surfaces; corolla 10-12 mm. long. 



77. A. Howellii. 



Leaflets glabrous above; corolla 8 mm. long. 78. A. misellus. 



Corolla purple; pod 6 mm. wide. 79. A. inyoensis. 



Plant densely white-tomentose or villous. 



Pods glabrous. 80. A. Nevinii. 



Pods pubescent. 81. A. Traskiae. 



Pods subsessile, the stipe, if present, much shorter than the calyx, somewhat obcompressed, broadly sulcate 

 on the lower suture. 

 Racemes lax, exceeding the leaves; pods not mottled. 



Septum of the pod extending halfway to the upper suture. 82. A. mensarus. 



Septum very narrow. 



Leaflets and pod linear, the latter 2-3 mm. broad. 83. A. owyheensis. 



Leaflets and pod oblong, the latter 5-6 mm. broad. 84. A. salmonis. 



Racemes 1-4-flowered, much shorter than the leaves. 85. A. panamintensis. 



Pods erect or ascending. 



Pods distinctly stipitate. 



Stipe much exceeding the calyx; pod glabrous. 

 Stipe about equaling the calyx; pod strigose. 

 Pods sessile or subsessile. 



Calyx 5-6 mm. long; corolla 12-15 mm. long; plants 3-4 dm. high. 

 Calyx 3-4 mm. long; corolla 8-10 mm. long; plants 1-2 dm. high. 



X. Brachyphragma. 



Perennials; corolla purple or white; pod sessile or short-stipitate, coriaceous, terete or nearly so, oblong- 

 ellipsoid to long-ovoid, splitting at the apex, incompletely 2-celled, the partial septum not meeting the apex nor 

 the upper suture. 



Pods densely tomentose, long-ovoid; flowers reflexed. 90. A. Brauntonii. 



Pods strigose or glabrous, oblong; flowers spreading. 



Pod sessile or subsessile. 



Leaflets linear, glabrate above; pod spreading, about 3 cm. long, glabrous. 



91. A. Serenoi. 



Leaflets elliptic or oval, white-strigose on both surfaces; pod strigose. 92. A. mohavensis. 



Pod distinctly stipitate, the stipe about 7 mm. long; leaflets narrowly linear, strigose on both surfaces. 



93. A. pachypus. 



XI. Cystium. 



Perennials, with glabrous, sparingly pubescent, or cinereous leaves; flowers ochroleucous or purple; calyx 

 short-cylindric or campanulate, the teeth subulate; pod membranous, much inflated, perfectly 2-celled by the 

 intrusion of both sutures, several-seeded. 



Racemes elongated, loosely flowered except in A. tehachapiensis; biennials or short-lived perennials, usually 

 flowering as winter annuals. 

 Pods and usually the whole plant densely white-silky; corolla blue-purple or rarely white. 

 Corolla 15 mm. long; pods well-inflated and broadly ovoid. 

 Corolla 10-12 mm. long; pod little inflated, lanceolate, strongly arcuate. 

 Pods rather thinly strigose with curved hairs. 



Calyx white-hairy, rarely with a few black hairs. 



Pods firm, usually mottled, strigose with curved hairs. 

 Pods thin, papery, shining, glabrous or thinly strigose. 

 Calyx black-hairy. 



Stems and leaves white-tomentose; calyx with spreading hairs. 

 Stems and leaves very thinly strigose or glabrous; calyx appressed-pubescent. 



99. A. 



Racemes subcapitate, densely flowered; plants perennial, the stems prostrate or decumbent. 



Plants not cespitose, the stems prostrate, slender, often 40-50 dm. long; leaflets densely white-silky, at least 

 when young. 100. A. albifolius. 



