Reventi-Arrecti. 159 



raised externally also, with tip not conspicuously declined. 

 Flowers rather spicate, 1.5-2 cm. long, white or nearly so. Calyx 

 cylindrical, 5-8 mm. long, nigrescent. Banner oblong ovate 

 7-15 mm. long, arched rather abruptly beyond calyx tins 

 to 45 to 90 degrees, much longer than keel, sides reflexed 2 mm. 

 wide below. Wings about straight, 2 mm. wide, longer than keel. 

 Fruiting peduncles nearly as thick as stems, coarsely sulcate. 

 Leaves narrow, with petiole shorter than rachis. Leaflets el- 

 liptical to linear, not over 2.5 cm. long, separated about half their 

 length. Stems coarsely sulcate, bent at the nodes which are few 

 and mostly congested near the root except in A. adanus. densely 

 tufted and sparsely pubescent except when young, the whole 1-2 

 ft. high. Stipules hyaline, inclined to be connate below, broad 

 and rather short. Reventi. 



Proper stems almost none. 1 15 reventus. 



Stems 1-2 ft. high. >l6 adanus. 



^. Pods stipitate. coriaceous to papery, evidently inflated, finely 

 cress-ribbed. Plants with conspicuous stems except in forms of 

 A. arrectus. Flowers racemose, rather ascending. Leaflets 5-10 

 pairs. • 



2AB. Pods coriaceous to papery, nearly linear to oblong, 2-3 cm. 

 long, including stipe, with triangular-cordate cross section, ab- 

 ruptly (Contracted at tip into the flat beak which is nearly in 

 line with the dorsal suture, nearly straight and erect, the calyx 

 often recurved. Flowers 1-1.5 cm. long. Arrecti. 



Stems slender, with several nodes. 117 arrectus. 



2A2B. Pods smooth, cartilaginous to coriaceous, 2-7 cm. long, al- 

 most 2-celled, conspicuously sulcate at both sutures, much ob- 

 compressed and arcuate, long-stipitate on a recurved pedicel 

 and with tips erect, and long-acuminate-triangular, on axillary 

 peduncles about 1 dm. long, shorter thatn^ the leaves, few, rather 

 capitate in flower. Leaves about 1 dm. long, almost sessile, 

 with about 10 pairs of broadly to narrowly elliptical leaflets 

 1-2 cm. long and rounded to retuse and nearly contiguous. Stems 

 weakly ascending, 1-2 ft. long, with rather many nodes and 

 slender internodes, tufted from rather woody roots. Flowers 

 probably white, about 2 cm. long. Calyx cylindrical. 5-7 mm. 

 long, the teeth shorter than the tube, on short and stout pedicels. 

 Stems decumbent, slender, 1-2 ft. high, from the woody crown. 

 Vallares. 



Flowers 2 cm. long. Pods 2 cm, long or more. 



Stems coarse and low, with few nodes. Pods 2 cm. long. llS Cimne. 

 Stems slender, with many nodes. Pods 4-5 cm. long, iig vallaris. 

 Flowers and pods I cm. long. I20 Bolanderi. 



2A3B. Pods wholly 2-celled by sutures being united and forming a 

 double partition which splits through when old forming two se- 

 parate cells, but a plum like fleshy fruit when ripe, which is 

 generally sulcate at one or both sutures, on slender stipes at 

 least as long as the calyx, oblique but little if at all arcuate, ab- 

 ruptly rounded at tip, with very short and stout not flat up- 

 curved beak inserted above the middle of the end, laterally com- 

 pressed when dry, reflexed or indifferently spreading, ventral 

 suture rather prominent, stipes about 7 mm. long. Flowers 

 white, about 1.5 cm. long, rather narrow, widely spreading or re- 

 flexed when old. Banner ascending in gentle arc to 45 degrees 

 beyond calyx tips, oblong-oval. Wings straight, about 3 mm. 

 longer than keel, 2 mm. wide. Keei straight, with tip abruptly 

 bent to erect, about 3 mm. long and high, often dark-tipped or 

 not. Calyx nearly equaled by the teeth which are subulate. 

 Tube campanulate to cylindric. Bracts about 2 mm. long, subu- 



