LEGUMINOSAE ROBINIA 



559 



Fig. 308. Black Locust (Robinia Pseud-acacia). 1. Flowering 

 branch. 2. Flower. 3. Tube of stamens. 4. Longitudinal section 

 of pistil. 5. Diagram of flower. 6. Legumes. 7. Pod open, showing 

 seed. 8. Seed. 1, 2, 6, 7, 8, one-half natural size. (M. M. Cheney 

 in Green's Forestry of Minnesota.) 



mes; calyx short, 5-toothed, and slightly 2-lobed; standard large, about as 

 long as the wings and equal ; stamens diadelphous ; pod flat, several seeded and 

 margined. A small genus of 6 species, native of North America and Mexico. 

 Several species are cultivated for ornamental purposes, like the Robinia 

 viscosa, which is native from Virginia to North Carolina and Georgia, and the 

 Robinia hispidia, native to the mountains of Virginia and Georgia. The R. 

 neo-mexicana, with purple flowers, native to S. Colorado and New Mexico, 

 is frequently cultivated. 



Robinia Pseudo-acacia L. Locust Tree, False Acacia or Black Locust 



A large tree with rough bark, spiny stipules; 9-19 stalked leaflets, obtuse, 

 emarginate, or mucronate; flowers in loose drooping racemes, white, fragrant; 

 pods smooth ; standard yellowish at the base. 





