[18] Galcrucella luteola Mull.
[19] Gossyparia spuria Mod. (Data regarding both insects furnished by the Bureau of Entomology.)
The best specimens are to be found in the northern part of region 10, although the elm is being grown all over the United States and is proving a valuable street tree even in towns and villages of regions where the rainfall is as low as 15 inches. It is not recommended for planting in regions 3 and 5.
The English elm[20] is a tall, oval-headed, compact, handsome tree with leaves smaller than the American elm and which stay on much later in the fall. In regions 1 and 2 it is at its best, in the former equaling the American elm and in the latter excelling it. It also thrives in regions 3 and 10 and in the eastern part of region 11.
[20] Ulmus campestris L.
The Huntingdon elm[21] is a comparatively round-headed European variety.
[21] Ulmus hollandica vegeta (Lindl.) Rend.
It is a large, handsome tree with good foliage and is more compact in growth than the American elm. It succeeds well in regions 1, 2, 3, and 4.
The wahoo, or winged elm,[22] is native to the South Atlantic and Gulf States near the ocean. It has larger leaves than the American elm and is not as spreading in its growth, but it succeeds well on city streets in regions 11, 12, and 13.