132 FAB ACE AE 



Leaflets permanently pubescent above. 



Pubescence of the stem of one kind, usually short, except in L. comatus. 



XII. Cyaxei. 

 Pubescence of the stem of two kinds, \az., a short and dense under-pube.s- 

 cence and scattered long silky hairs. XIII. Leucophylli. 



Plant low, less than 3 dm. liigh, densely cespitose. 

 Inflorescence much exceeding the leaves. 



Leaves mostly basal; petioles many times longer than the leaflets. 



XIV. Lepidi. 

 Leaves mostly cauline; petioles of the cauUne leaves only sUghtly, if at all, 

 exceeding the leaflets in length. 

 Leaves densely canescent. XV. C.\NDic.\JvrTE3. 



Leaves green. XVI. MoxTicOLAE. 



Inflorescence not exceeding the leaves. XVII. Caespitosi. 



Annuals. 



Cotyledons after germination petioled; pods 3-4-seeded. XVIII. CoxciNNl. 



Cotyledons after germination sessile, persistent, clasping the stem; pod 2-seeded. 



XIX. PUSILU. 



I. PL-^TTEXSES. 



One species. 1. L. plattensis. 



II. Parviflori. 



Calyx spurred or saccate at the base, appressed-silky ; banner pubescent on the back; 

 keel ciliate. 

 Leaflets oblanceolate, flat; racemes comparatively dense; flowers numerous, sub- 

 verticiUate. 2. L. pseudoparviflorus. 



Leaflets linear, condupUcate; flowers scattered in a lax raceme. 



3. L. stenophyllus. 

 Calyx somewhat gibbous at the base, but not produced backwards into a spur or sack. 

 Inflorescence, pedicels, and calyces finely white-silky with strictly appressed hairs. 

 Flowers 1.5 mm. long; corolla white. 4. L. leucanthus. 



Flowers 12 mm. long or less; corolla purple or blue. 



Banner somewhat silky on the back ; lower Up of the catyx twice as long as 



the upper; keel ciliate on the margins. 5. L. Scheuberae. 



Banner glabrous; keel not ciliate. 



Lower lip of the calyx only slightly longer than the upper; flowers about 



10 mm. long; plant green. 6. L. laiispicus. 



Lower Up of the calyx much longer than the upper; corolla about 8 mm. 

 long; plant silvery. 7. L. tenellus. 



Inflorescence, pedicels, and calyces more loosely pubescent ; hairs at least in age spread- 

 ing. 

 Flowers middle-sized, 8-12 mm. long. 



Banner pubescent on the back; plant silvery. 8. L. argenteus. 



Banner glabrous; plant green. 



Calyx strongly gibbous at the base; keel glabrous; stem purplish. 



9. L. rubricaulis. 

 Calyx not strongly gibbous; stem green. 



iBanner blue or purplish, not dark-spotted. 



Lower lip of the calyx about twice as long as the upper; leaves 



broadly oblanceolate. 10. L. spathulatus. 



Lower Up of the calyx only slightly longer than the upper ; leaflets 

 narrowly oblanceolate. 11. L. alpestris. 



Banner light blue with a dark spot. 12. L. maculalus. 



Flowers about 6 mm. long. 



Leaflets narrowly oblanceolate. 



Lips of the calj-x acutely 2- and 3-toothed. 13. L. floribundus. 



Lips of the calyx obtuse, merely retuse. 14. L. leptostachyus. 



Leaflets broadly oblanceolate. 15. L. parviflorus. 



III. Calc.vr.-vti. 



One species 16. L. calcaratus. 



IV. Argophylli. 



Lower lip of the calyx about half longer than the upper ; leaflets linear-oblanceolate. 

 Petals and caly.x-lobes narrow; wings fully twice as long as broad; lower Up of calyx 



narrowly lanceolate: plant greener: inflorescence lax. 17. L. lariflorus. 



Petals and "calyx-lobes broad; lower lip of the calyx broadly lanceolate; plant silvery 

 white; Inflorescence dense. 18. L. aduncus. 



Lower lip of the calyx about twice as long as the upper ; leaflets broadly lanceolate. 



Leaflets equally "silvery white on both sides, usuaUy condupUcate; their backs usually 



curved. 19. L. argenlinus. 



Leaflets grajish canescent, greener aboA-e, flat. 20. L. lupinus. 



V. SUIJ'HUREI. 



Flowers 12-14 mm. long; uoper lip of calyx about 8 mm. long. 21. L. flavescens. 

 Flowers 1 cm. long or less; upper lip of calyx very short, only 4 mm. long. 



Inflorescence loosely pubescent; flowers about 10 mm. long. 22. L. sulphureus. 



Inflorescence fliielyappressed-silky ; flowers about 8 mm. long. 



23. L. lucidulus. 



VI. Albicaules. 

 One species. 24. L. albicaulis. 



