442 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Tree, sometimes 10 meters high ; leaves odd-pinnate, the leaflets oral or ob- 

 long, 1 to 7 cm. long, rounded or emarginate at apex, black-dotted, puberulent 

 when young but soon glabratc" ; flowers small, in slender racemes, the calyx 

 accre.scent in fruit. "Palo de arco " (Guerrero, Oaxaca) ; "ebano," " caca- 

 naquasle " (Colima) ; "arco negro," " matagullina," " palo matagallina," " palo 

 de arco negro," "palo de arco" (Oxaea) ; " guie-biche " (Oaxaca, Zapotec, 

 Reko) ; " eacanaguaste " (Colima). 



The bark is said to yield a dye. 



11. AMORPHA L. kSp. I'l. 713. 1753. 

 Erect unarmed shrubs ; leaves pinnate, the leaflets numej-ous, gland-dotted ; 

 flowers small, violet, racemose, the corolla of a single petal ; fruit short, 1 or 

 2-seeded, indehiscent. 



Calyx lobes very short, obtuse ; rachis of the leaf not aculeolate. 



1. A. fragrans. 

 Calyx lobes elongate, acute ; rachis of the leaf finely glandular-aculeolate. 



2. A. califomica. 



1. Amorpha fragrans Sweet, Rril. Fl. Gard. pi. 2/fl. 1828. 

 Aviorpha ooc-idcntalis Abrams. Bull. N. Y. Bot. Gard. 6: 894. 1910. 

 Northern Chihuahua and Sonora. California to Texas, Illinois, and Montana. 

 Shrub, 1 to 3 meters high ; leaflets 9 to 27, oblong to oval, 1.5 to 4 cm. long. 



minutely strigose; racemes 8 to 20 cm. long; calyx gland-dotted, 3 to 3.5 mm. 

 long ; banner 4.5 to 5 mm. long ; fruit 5 mm. long. 



From some of the related species, known in the United Sta^tes as " false in- 

 digo," a kind of»indigo was formerly extracted. 



2. Amorpha calif ornica Nutt. ; Torr. & Gray, Fl. N. Anier. 1: 306. 1838. 

 Mountains of Baja California. Southern Arizona and California (type from 



Santa Barbara). 



Shrub 1 to 3 meters high ; leaflets 11 to 25. oval or elliptic, 1 to 3 cm. long, 

 .soft-pilose, rounded at apex; racemes 5 to 20 cm. long; calyx 5 to 6 mm. long; 

 banner 5 mm. long; fruit curved, 5 mm. long. 



DOUBTFUL SPECIES. 

 Amorpha rabiae Lex.; Llave & Lex. Nov. Veg. Descr. 1: 22. 1S24. Described 

 from Pico de Quinceo, near IMoi-elia, Michoaciln. Probably not of this genus. 



12. EYSENHARDTIA H. B. K. Nov. Gen. & Sp. 6: 489. 1824. 

 Referknce: Pennell, N. Amer. Fl. 24: 34-40. 1919. 



Shrubs or small trees; leaves pinnate, the leaflets glandular-punctate; flowers 

 in lax spikelike racemes; corolla nearly regular, white; .stamens 10; fruit inde- 

 hiscent, 1-seeded. 



Calyx irregular, in fruit flaring from the base, the slit between the pos- 

 terior lobes extending nearly to the base, the anterior lobes decidedly 

 longer than the posterior ones. 

 Leaflets 35 to 45. 8 to 12 mm. long; bracts deciduous before anthesis; fruit 



14 to 16 mm. long, glabrous 1. E. punctata. 



Leaflets 9 to 25. 3 to G mm. long; bracts persistent until after anthesis; fruit 

 5 to 7 mm. long, pubescent. 

 Leaflets 21 to 25, densely pubescent on the upper surface ; racemes 6 to 9 



cm. long 2. K schizocalyx. 



Leaflets 9 to 17, nearly glai)rous on the upper surface; racemes 1 to 5 cm. 

 long. 



