520 



PROCEEDINGS OF THE AMERICAN ACADEMY 



upper narrow ; banner acute, margins adherent 

 at the apex ; keel very falcate, naked 



Lfts. smooth above ; upper lip shorter, broader ; 

 banner acutish ; keel ciliate, less falcate 



Lfts. subappressed-silky both sides ; pubescence 

 of stem and pedicels dense and spreading ; bracts 

 long ; banner silky ; keel strongly bearded 



Lfts. 5 - 7 ; pubescence appressed, silky, usually 

 short ; banner silky ; keel ciliate 



d. Leaves distant, not smooth above ; lower petioles elon- 



gated ; racemes mostly dense and fls". smaller, except 

 in L. sulphnreus ; ovules 4-6. 



Flowers yellow 



Pubescence villous, spreading ; bracts deciduous, 

 often exceeding the densely villous calyx ; calyx- 

 lips subequal ; banner hairy ; keel ciliate . 



Stout, densely silky-tomentose ; pedicels very 

 short ; bracts subpersistent ; banner very villous 



Densely rough-pubescent with spreading hairs ; 

 pedicels short ; bracts short, deciduous ; banner 

 subhairy 



Densely appressed-silky, leafy at base, often low ; 

 petioles elongated ; bracts deciduous ; banner 

 naked 



Silky-villous ; raceme dense ; bracts persistent, 

 equalling the calyx ; fls. verticillate ; banner 

 oblong, naked 



e. Leafy ; petioles short ; racemes short-peduncled ; bracts 



deciduous, mostly short; fls. mostly small, not yel- 

 low ; ovules 3-5. 



Subdecumbent ; pubescence mostly short ; lfts. 

 silky both sides ; bracts at least equalling the 

 calyx ; banner very hairy ; keel very ciliate 



Erect, slender, much branched, puberulent; lfts. 

 pubescent both sides ; banner and keel naked 



Erect, slender, strict, scantily puberulent ; lfts. 

 glabrous above ; bracts equalling the silky ca- 

 lyx ; banner naked 



Appressed-subsilky ; lfts. oblanceolate, pubescent 

 both sides ; calyx strongly spurred ; banner long- 

 est, hairy ; keel ciliate 



Appressed puberulent ; lfts. narrowly oblanceolate, 

 pubescent both sides ; calyx narrow, saccate ; 

 petals equal ; banner subpubescent ; keel ciliate 



Appressed puberulent or silky ; lfts. linear-lanceo- 

 late, smooth above ; calyx campanulate, gib- 

 bous ; petals equal ; banner subhairy 



16. L. albicaulis. 

 17. L. Sitgreavn. 



18. L. barbiger. 

 19. L. ornatus. 



20. L. sulphnreus. 



21. L. sericeus. 

 22. L. leucophyllus. 



23. L. Palmeri. 



24. L. lepidus. 



25. L.confertus. 



26. L.Jlexuosus. 

 27. L. Andersoni. 



28. L. parviflorus. 



29. L. calcaratus. 

 30. L. laxijlorus. 

 31. L. argenteus. 



