4G0 FABACEAE 



Pubescence of the leaves appressed. 



Corolla blue; baiuier with a light spot. 



Bracts linear-lanceolate to subulate. 5-8 ram. long. 



Corolla 12-14 mm. long; leaflets 3-7 cm. long. 49. L. sericeus. 

 Corolla 10 mm. long or less; leaflets 2-3 cm. long. 50. L. apronosus. 

 Bracts lanceolate. 3-5 nim. long. 



Leaflets densely pubescent above; corolla about 12 mm. long. 



51. Lr. Bakeri, 



Leaves sparingly pubescent or glabrate above; corolla about 10 mm. long. 



52. L. cyaneus. 



Corolla at first white; banner turning purplish; no light spot. 



53. L. dichrous. 



Pubescence of the leaves long and loose; cor*?lla light purple or pink; banner with a 

 dark spot. 54, L, ftavicauhs. 



4 



XIII. Leucophtlli. 



Racemes elongate, 1-3 dm. long, terminal. 



Flowers numerous in a very long and dense raceme. 

 Bracts lanceolate, not much longer than the buds. 

 Pubescence not very dense. 



Pubescence on the leaves appressed. 55. L. macrostachys. 



Pubescence on the leaves short, spreadinfi;, 56. L. retrorsus. 



Pubescence very dense, in age more or less rusty, and rather loose. 



57. L. leucophuUas. 



Bracts subulate, much exceeding the buds; flowers about 16 mm. long. 

 Pubescence of the leaves long and loose. 58. L plumosus. 



Pubescence of the leaves short, appressed. 59. L. JonesU. 



Flowers in a long, but lax raceme. 60. L. barbiger. 



Racemes short, 3-5 cm. long, terminating short divaricate branches. 



61. L. ramosus. 



XIV. Lepidi. 

 Stem trailing or decumbent. 62. L. depressus. 



Stem erect or ascending, if at all decumbent, only so at the base. 



Pubescence of the stem and leaves loose. 63. L. aridus. 



Pubescence of the stem and leaves appressed. 



Flowers 7-10 mm. long; stem mostly 1-leaved or leafless; pubescence short. 

 Racemes short, dense, 2-5 cm. long; flowers about 10 long. 



• 64. L. minimus. 



Racemes elongate, S-9 cm. long; flowers 7-8 mm. long. 



65. L. erectus. 

 Flowers 12 mm. long or more; stem with several stem-leaves; pubescence long. 



66. L. lepidus. 



XV. Candtcantes. 

 Flowers 9-10 mm. long or more. 



Peduncles short; raceme elongate. 67. L. psoralioides. 



Peduncles elongate; racemes short. 68. L. candicans. 



Flowers 6--7 mm. long. 69. L. Evermannii, 



XVI. MONTICOLAE. 



Flowers 9-10 mm. long; petais dark blue; banner with a Ught spot, 



„- ^ ^ 70. L, monticola. 



1^ lowers 7-8 mm. long; petals light rose, turning yellowish, 71. L. roseolus. 



XVII. Caespitosi. 



Plant loosely pubescent with long hairs. 



Racemes very short and dense, sessile; bracts lanceolate, about equalling the flowers; 



pubescence rather appressed. 72. L. caespitosus. 



Racemes elongate; bracts subulate, exceeding the flowers; pubescence spreading. 



■Di X ^ , . 73. L. Watsonii. 



Plant densely canescent. 74. l. Cusickii. 



Ck^^ ^^ . XVIII. CONCIXNT. 



One species. . 75^ j^ micensis. 



XIX. PUSILU. 



'^^*^^??^ dense, subcapitate; lower Up of the calyx 2-3-toothed. 



Plant almost steml€ss; lower Up of the calyx oval or ovate. 76. L. brevicaulis. 

 l^lant \\ath distmct leafy stem; lower Up of the calyx oblong -lanceolate. 



^^'vZ^r.^Z^r^}?!^^^^ ^""^^ less dense; lower Up of the calyx enSe.^' ■^*'^^"' 

 Peduncles much exceedmg the leaves. 78 L. scaposus. 



Peduncles very short, shorter than the petioles. 



Kacernes lax usually much exceeding the leaves; lower part of the calyx and 



pedicels glabrous. 7y i^ rubewi 



Racemes dense. sUghtly if at aU exceeding the leaves; calyx and pedicels densely 

 *^"sute. s'q^ 2:_ pusillus, 



1. L. plattensis S. Wats. Stem short, densely leafy, 2-5 dm. high; leaf- 

 lets 7-9, oblanceolate, obtuse or acutish, thick, somewhat glaucous, grayish 

 silky-strieose beneath. 2-4 cm. loner: racpmAa i-i c; a^ ^^^rr^ Ui-ani^a Unnpolate. 



