NORTH AMERICAN FLORA 



[Volume 24 



Leaflets usually 1-3 cm. long. 



Calyx glabrous; leaflets strigillose on both sides; stipules 



foliaeeous. 

 Calyx strigillose; leaflets glabrous above; stipules small. 

 Leaflets orbicular, rounded-oval, or obovate. 

 Leaflets 17-21, silky-strigose. 



VI. Minutifoliae 

 Leaves glabrous; stipules oblong or lanceolate. 

 Leaves strigose-canescent ; stipules linear-subulate. 



17. B. 



18. B. 



19. B. 



20. B. 



21. B. 



22. B. 



peninsularis. 

 strigillosa. 

 molliuscula. 

 lit 



minutifolia. 



canescens. 



One species. 



Leaflets narrowly lanceolate. 

 Leaflets ovate to lance-elliptic. 



One species. 

 One species. 



VII. Parvifoliae 



VIII. Hirsutae 



IX. Sl'BEREAE 



X. Tripoli atae 



23. B. parvifolia. 



24. B. 



25. B. 



XL Sericeae 

 Bractlets broadly ovate, subcordate at the base, almost as long as the calyx. 

 Bractlets lanceolate or elliptic, much shorter than the calyx. 

 Calyx densely silky. 



Leaves and young branches silvery-whi'e when young; young 

 branches mostly white-hairy; leaflets broadly oblong. 

 Stipules ovate. 

 Stipules lanceolate. 

 Leaves silky, but not silvery-white; young branches mostly black- 

 hairy. 

 Leaflets 7—13, rather thin, ovate or oval. . 



Leaflets 13-25, firm, oblong. 

 Leaflets 1-2 cm. long. 

 Leaflets 2-3 cm. long. 

 Calyx glabrous or nearly so. 

 Leaflets ovate or oval. 

 Leaflets oblong. 



26. B. 



27. B. 



28. B. 



suberea. 

 Irifoliatn 

 litpinoides 



One species. 

 One species. 



XII. Parryanae 



XIII. Oligospermae 



29. B. argentea. 



30. B. sericea. 



32. B. vicioides. 



33. B. Benlhamiana. 



34. B. mollis. 



35. B.magnibracteala, 



36. B. Parryi. 



37. B. oligosperma. 



1. Brongniartia bilabiata M. Micheli, Mem. Soc 

 Geneve 34: 248. 1903. 



A shrub, 1.5 m. high; branches glabrous; leaves about 1 dm. long; stipules very small, 

 deciduous; leaflets 7-9, broadly ovate or obovate, rounded at both ends or retuse at the apex, 

 short-petioled, glabrous on both sides, 2-4 cm. long, 1-3 cm. wide, faintly reticulate; flowers 

 5-7, in terminal or axillary fascicles; pedicels 1.5-2 cm. long; bractlets very small, subulate; 

 calyx glabrous, 1.5 cm. long, distinctly 2-lipped, the upper two lobes united four-fifths, the lower 

 thiee three-fourths their length; corolla 2 cm. long; banner broad, short-stipitate, tinged with 

 purplish-violet; wings obliquely ovate, falcate, purple; keel-petals obtuse, pale greenish- 

 violet; pod glabrous, narrowed at the base and short-stipitate, 5 cm. long, 5-6-seeded; seed 

 8 mm. long, 5 mm. wide. 



Type locality: Banks of Rio San Luis. Guerrero or Michoacan. 



Distribution: Known only from the type locality. 



Illustration: Mem. Soc. Geneve 34: pi. 5S°. 



2 Brongniartia inconstans S. Wats. Proc. Am. Acad. 22: 404. 



1887. 



A shrub, about 1 m. high; branches glabrous, or more or less pilose with brownish hairs; 



leaves 3-10 cm. long; stipules large, foliaeeous, broadly obliquely cordate, 1.5-3.5 cm. long, 



strongly reticulate, often connate on one side; leaflets 1-5, broadly oval or ovate, abruptly 



