160 



NORTH AMERICAN FLORA 



[Volu me 24 



Petioles usually much longer than the lower leaflets. 

 Leaflets oblanceolate, oblong, or somewhat cuneate. 

 Leaflets narrowly linear. 

 Racemes long, many-flowered, the flowers often 2-4 at each node. 

 Pubescence of the stem spreading. 



Leaflets 5—11, broadly elliptic; upper part of the stem and the 



peduncles triangular. 

 Leaflets 1 1-23, oblong or oblanceolate; stem and peduncles terete. 

 Stem, leaf-rachis, and peduncle ferruginous-pubescent; plant 



stout. 

 Stem, leaf-rachis, and peduncle white- or gray-pubescent; 

 plant slender. 

 Calyx and peduncle densely pilose. 

 Calyx sparingly hirsute; peduncle strigose. 

 Pubescence of the stem appressed. 

 Stem simple, strict. 



Calyx densely pilose-canescent ; corolla yellowish. 

 Calyx sparingly hirsute-strigose; corolla rose -colored. 



Leaflets oblong, elliptic, oblanceolate, or oblong-obovate, 



decidedly strigose beneath. 

 Leaflets linear or linear -oblanceolate, glabrous or nearly so. 

 Stem much branched, flexuose. 

 Leaves silvery, at least beneath. 

 Leaves green above. 

 Leaves silvery-canescent on both sides. 



Leaflets linear, acute, with a short straight mucro. 

 Leaflets linear-oblanceolate, with a recurved mucro. 



XVI. Purpureas 

 Pubescence of the stem spreading. 



Calyx-lobes not longer than the tube; leaflets linear or linear-oblong. 

 Leaves villous or pillose on both sides. 

 Racemes very long, many-flowered. 

 Racemes short, few-flowered. 

 Leaves glabrous above. 

 Calyx-lobes longer than the tube. 



Leaflets linear-oblanceolate to oblong, usually more than 2 cm. long; 



corolla about 10 mm. long or more. 

 Leaflets oblanceolate, oblong, or cuneate, 1-2 cm. long; corolla 8-10 

 mm. long. 

 Pubescence of the stem appressed. 



Calyx-lobes about equaling the tube. 



Leaflets oblong or oblanceolate, rounded or refuse at the apex. 

 Pods more or less arcuate upwards; leaves strigose beneath. 

 Pods straight; leaves minutely strigulose or glabrous beneath. 

 Leaflets linear, acute or merely obtusish at the apex. 



Leaves somewhat strigose but not silvery beneath; pods minutely 

 strigose. 

 Stem herbaceous, from a tap-root or a subterranean rootstock ; 



plant light-green; leaflets mostly 7-11. 

 Stem somewhat suffrutescent at the base; plant dark -green; 

 leaflets mostly 11-15. 

 Leaflets mostly linear-oblanceolate, distinctly strigose 



beneath. 

 Leaflets narrowly linear, glabrous or nearly so beneath. 

 Leaves silvery-strigose beneath; pods short-hirsute. 

 Calyx -lobes decidedly longer than the tube. 



Leaflets obovate or cuneate to broadly oblanceolate, rounded or refuse 

 at the apex. 

 Leaflets glabrous above. 

 Leaflets strigose above. 

 Leaflets linear-oblanceolate to narrowly linear, obtuse or acute. 

 Leaflets linear-oblanceolate. 



Calyx sparingly hairy, hirsute; leaflets sparingly strigose 



beneath, glabrous above. 

 Calyx cinereous-strigose; leaflets cinereous, at least beneath. 

 Leaflets narrowly linear, very acute or attenuate. 



XVII. Noctiflorae 



Plant shrubby; pods long-hairy, 6 mm. wide; sutures not prominent. 71. C. nocti flora. 



Plant annual, herbaceous; pods short hairy. 4 mm. wide; sutures prominent. 72. C. bracieolata. 



I. Grandiflorae. Stem monopodial; racemes terminating the stem or leafy branches, 

 corymbiform, few-flowered. Leaves 1 1-15 foliolate; stipules ovate, several-ribbed, persistent, 

 often brownish. Corolla 15-20 mm. long, rose-red. Pod short-pubescent on the sutures. 



47. C. ambigua. 



48. C. gracillimc 



49. C. tepicana. 



50. C. onobrychoides. 



51. C. californica. 

 6. C. rhodanlka. 



53. C. lexana. 



54. C. angustifolia. 

 69. C. cinerea. 



72. C. bracteolala. 



55. C. Palmeri. 



56. C. hamata. 



27. C. Brandegei. 

 57. C. corallieola. 

 26. C. vicioides. 



58. C. littoralis. 



59. C. decumbtns. 



60. C. purpurea. 



61. C. Curlissii. 



62. C. tenella. 



63. C. piscatoria. 



64. C. angustissima. 



65. C. hypoleuca. 



66. C. Wallichii. 



67. C. cathartica. 



68. C. domingensis. 



69. C. cinerea. 



70. C. Rusbyi. 



