PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 63 



each, however, predominating, or even wholly replacing the other, in 

 particular localities. 



Flowers as early as March 10 (Schneck), leafing April 15 to 20. 



11. (53.) Negundo aceroides. Box Elder. 



A very coffmou, and in some localities abundant, underwood in rich 

 bottoms. The larger trees of this species are 2i to 3 — rarely 1 — feet in 

 diameter, and 50 to 60, possibly 70, feet high. No measurements for 

 height have been made, but the tallest specimens do not approach the 

 elevation of the oaks and other trees with which they are associated. 



Flowers March 20, leafing the last week in April. 



12. (56.) Rhus typMna. Stag-horn Sumac. 



In most localities less common than B. glabra. The largest speci- 

 mens observed were about 30 to 35 feet high, and 4 inches in diameter. 



13. ( .) Rhus glabra. Smooth Sumac. 



Much the commonest species, and when growing in woods or thickets 

 attaining a height of 30 to 35 feet. ]S"ear Monteur's Pond, in Knox 

 County, Indiana, I found this species and R. copalUna growing together, 

 and to about an equal size. 



14. ( .) Rhus copallina. "Dwarf Sumac." (!) 



A very common species in some localities. Near the northwestern 

 border of Monteur's Pond, in Knox County, Indiana, it is an abundant 

 underwood, growing frequently to a height of 25 to 30 feet, and 4 inches 

 or over hi diameter. Three specimens (the only ones measured) were, 

 respectively, 25^, 31i and 32^ feet in height (all being cut down for 

 measurement), 6, 7, and IJ feet trunk, and 14, 8, and 29 inches in cir- 

 cumference. The last consisted properly three stems united at the base, 

 though near the ground the coalescence of the wood was almost com- 

 plete, while externally there was no evidence of the triple nature of the 

 trunk. A section of this trunk, also leaves and fruit of the same tree, 

 has been deposited in the museum of the Agiicultural Department. 



15. ( .) Amorpha fruticosa. False Indigo. 



In the cypress swamps of Knox County, Indiana, I found this shrub 

 growing to a very unusual size, many specimens being 20 feet and up- 

 wards in height. The largest one seen was cut down for measurement, 

 and found to be 35 feet high; it was 17 inches in circumference at the 

 base, and contained eighteen annual rings. 



16. (65.) Gymnodadus canadensis. Coflfee-bean; Coffee-nut. 

 Scarcely one of our native trees is more local in its distribution than 



the present species, and there are few localities indeed where it can be 

 said to be abundant. It is usually found scattered through the richer 

 bottoms. 



