PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



65 



The following measurements are of rather unusually large speci- 

 mens: 



19. (58.) Eobinia pseudacacia. Black Locust. 



Not observed in a native state by Dr. Schneck or myself in Wabash 

 or adjoining counties in Illinois, or in Knox, Gibson, and Posey Coun- 

 ties, Indiana. Given by Maximilian, however, in his list of the trees 

 found in the latter county, where, probably, found only in hilly locali- 

 ties. 



20. (70.) Cercis canadensis. Red-bud. 



A very abundant underwood in all rich woods, but attaining its great- 

 est development in the bottom lands, where specimens 40 to 50 feet hijih 

 and 1 foot in diameter are not uncommon. The following measurements 

 have been taken : 



Flowers April 10 to 15, leafing from the 15th to the 20th of the same 

 month. 



21. (76.) Primus amencana. Wild Phuu. 



22. (78.) Primus cMcasa. Chickasaw Plum. 



Wild Plums are very abundant, but whether the F. chicasa is common 



in the wild state I do not know. I have seen cultivated trees, however, 



which were about 20 feet high and nearly a foot in diameter. P. amer- 



ieana is usually 15 to 20, sometimes 30 feet high, and flowers April 10. 



Proc. Nat. Mus. 82 5 June 12, 1882. 



