Eriophyes negundi

Hosts: Boxelder

Small warty swellings irregularly scattered over the upper surface of the leaves.
Color: green

Eriophyes Sp.
Chadwick's No. 2

Host Acer negundo L.

A shallow dimple on the under side of the leaf, filled with a white pubescence. In this gall as in the preceding species, the leaf blade has been very much thickened by proliferation in the mesophyll. The cells produced are circular in outline and of about the same size as those of the normal spongy parenchyma. The hairs produced in this case not infrequently consist of from 2 to 3 cells which are very much convoluted. They are well shown in Fig. 4. The hairs on the normal leaf of the host are straight or only very slightly curved, but the glandular, convoluted type of hair is found on the inflorescence. Both the normal and abnormal hairs are composed of the same number of cells.

Aceria negundi

Eriophyes ryderi

Host: Acer negundo

Relationship: Wart-like swellings or pouch galls on leaves, lower surface erineum

Range: Canada, FL, GA, IL, NY, OH, WV

Eriophyes negundi

Hosts: Acer negundo

The galls are large, rounded, and peculiarly pouchtype. They develop on the underside of the leaf blade as thickened cavities filled with a dense mass of felty, whitish, unicellular hairs. They protrude on the upper side and have slightly wrinkled domes. Their dimensions are variable. The galls are solitary and widespread on the leaf blade but are not on the veins.

Range: NY, IL, Canada, OH.

Eriophyes negundi
Phyllocoptes splendidus

Acer negundo

A white erineum or shallow dimple on the under side of the leaf, sometimes involving entire leaves of young or basal shoots

Eriophyes sp.

Acer negundo

Warty swellings on the leaves.

Eriophyes negundi

Described from individuals found in wart-like swellings of leaves of the black maple, Acer negundo L.