Mr. Munson has long been a close student of grapes, both in their economic and botanical features. He has traveled over a great part of the Union to see them growing in their natural conditions, and for many years he has grown numbers of the wild species and varieties. He has also had access to the best herbaria and literature. It is therefore gratifying that he has given us his conclusions upon specific limitations.

New York Botany.

Potato Rot Experiments.

It is impossible for anyone except a critical student of this difficult genus to estimate the particular values of the species as defined in this bulletin. But all can understand that a logical and comprehensive view of all our species marks an epoch in the knowledge of native grapes.

Mr. Munson describes 25 native species and two European (Vitis vinifera and V. Bourquiniana). These fall into eight series or divisions. Six species are first described by Mr. Munson : Vitis Doaniana, V. Girdiana, V. Bourquiniana, V. Simpsoni, V. Virginiana, V. Blancoii.

V. Munsoniana is a rotundifolia-like species from Florida, proposed by Mr. Simpson.