BOX-ELDERS, REAL AND SO-CALLED ES 7. 
This tree is a native of the Eastern United States along the 
coast from Maine or farther south as far south as Florida. It extends 
inland as far as Kentucky and Tennessee. Quite typical specimens 
I have seen and collected around Washington, Philadelphia, in 
the Shenandoah valley, Virginia, and in West Virginia and Mary- 
land. It grows wild along the Potomac River. It is scarcely 
found in typical appearance in Indiana, though some plants growing 
here have been observed in cultivation. 
The variety of Pax, Acer or Rulac Negundo latifolia is based 
on several plants segregated from the variety fexana or Acer 
Negundo var texanum Pax. It has broadly eleptical leaflets, 
the terminal leaflet wider than long, as its principal character. 
I have specimens of typical Rulac Negundo that exhibit such 
broad leaflets on younger shoots of the same plant. I have found 
such broad leaflets also in seedlings, or the early spring trifoliolate 
leaves of young plants of Rulac Nuttallit. 
This character seems then hardly a distinctive one, and is 
found in young or first leaves of the season and often on young 
two year old trees especially, these leaves developed early from the 
bud. 
The variety latifolium is based principally on Tennessee and 
Kentucky specimens, Dandridge’s, Hooker’s and Rugel’s, both 
in the U. S. National Herbarium, where I have examined them. 
2. Rulac Nuttallii Nwd., nomen novum. 
Negundo or Acer fraxinifolium Nuttall, 1818,* not 
Negundium fraxinifolium Raf., 1808.74 
Small or middle sized tree, with white or bluish glaucous twigs 
whose bark is usually somewhat thicker than in the preceding; 
leaves pinnately or incompletely bipinnately compound; leaflets 
usually smaller than those of the preceding, 3-11, usually 3-7 on 
fruiting branches and 5-11 on sterile shoots, leaflets rather thick and 
veny, dark-green above and paler beneath, glabrous on both 
sides except on the veins of the lower surface, with rather densely 
pubescent tufts in the angles of the principal veins; leaflets 
variously and irregularly toothed and cleft especially the terminal 
and basal lateral which are often again trifoliolate; secondary 
veins prominent and mesophyl pale beneath; flowering and fruiting 
racemes usually 40n a twig, opposite in pairs, with numerous samaras, 
ee ele (ce 
