STANDLEY TEEES AND SHRUBS OF MEXICO. 489 



Nissolia montana Rose, Contr. U. S. Nat. Herb. 8: 48. 1903. 



Jalisco and Guanajuato to Morelos and Puebla ; type from Beltrani, Jalisco. 



Leaflets elliptic or oval, thin, bright green ; fl[owers 1 cm. long. 

 10. Nissolia pringlei Rose, Contr. U. S. Nat. Herb. 5: 159. /. 20. 1899. 



Nissolia (liversifoUa Rose, Contr. U. S. Nat. Herb. 5: 160. /. 21. 1899. 



Nissolia muUiflora Rose, Contr. U. S. Nat. Herb. 5: 161. f. 2^. 1899. 



Chihuahua to Morelos and Oaxaca ; type from Santa Eulalia Mountains, 

 Chihuahua. 



Flowers about 7 mm. long ; fruit 3 cm. long, the wing about 7 mm. wide. 



DOUBTFUL SPECIES. 

 Nissolia platycaepa Benth. in Mart, Fl. Bras. 15 *: 77. 1859. Type from 

 Zimapdn, Hidalgo. This species has never been properly described, and it is 

 impossible to place it definitely. 



31. AMICIA H. B. K. Nov. Gen. & Sp. 6: 511. 1823. 

 1. Amicia zyg-omeris DC. Prodr. 2: 315. 1825. 



Chihuahua to Tepic, Oaxaca, and Veracruz. 



Slender unarmed shrub, or sometimes herbaceous, glabrous or pilose, leaflets 

 4 or 6, 2 to 6 cm. long and nearly as wide, truncate or emarginate at apex, con- 

 spicuously gland-dotted ; flowers 3 to 3.5 cm. long, yellow, racemose, subtended 

 by large, orbicular or reniform bracts. 



32, PICTETIA DC. Ann. Sci. Nat. 9: 93. 1825. 

 1. Pictetia microphylla Benth. ; Hemsl. Diag. PI, Mex. 8. 1878, 



Type collected in Sonora ; plant known to the writer only from the description. 



Glandular-pubescent shrub ; leaves pinnate, the leaflets 4 or 5 pairs, lanceo- 

 late, 3 mm. long, pungent ; flowers 1.8 cm. long, racemose ; fruit stipitate, 3 or 

 4-seeded, constricted between the seeds. 



33. AESCHYNOMENE L. Sp. PI. 713. 1753. 



Small shrubs or herbaceous plants ; leaves odd-pinnate ; flowers small, in 

 axillary racemes or clusters ; fruit flat, of 2 to several joints. 



Several other species besides those enumerated here occur in Mexico, but they 

 are all herbaceous forms. 



Stipules conspicuously produced below the point of insertion. 



Leaflets acute or acutish, the costa near the margin 1. A. americana. 



Leaflets very obtuse, the costa central. 



Stems glabrous or nearly so 2, A, sensitiva. 



Stems hispid. 



Fruit 5 to 6 mm. wide 3. A. hispida. 



Fruit 3 to 4 mm, wide 4. A, hispidula. 



Stipules not produced below the point of insertion, 

 Costa of the leaflets excentric, usually near the margin ; leaflets 3,5 mm. wide 

 or narrower, often acute. 



Leaflets densely white-sericeous 5, A. nlvea. 



Leaflets green, thinly sericeous or strigose or glabrate. 

 Leaflets obtuse, the costa not vei'y close to the margin. 

 Corolla 10 to 12 mm. long ; leaflets 2.5 to 3.5 mm. wide. 



6. A, fascicularis. 

 Corolla 6 to 7 mm. long; leaflets 1 to 1,5 mm. wide-_7. A. oligantha. 

 Leaflets acute, the costa very close to the margin. 



Leaflets 6 to 10 pairs 8. A. purpusii. 



Leaflets mostly more than 10 pairs 9, A, compacta. 



