"P. N. Mcl.," Bookton, Ontario, writes: "I send you, by mail to-day, the top of a potato plant in which part of the stem has become tubers or potatoes. As this is not a usual thing, a notice and description of it might interest the readers of the Monthly."

[This sometimes occurs, and is taken advantage of by the teachers of Morphological botany to show that a potato tuber is in reality only a thickened branch. At the base of almost all leaves along a branch there is a bud, known as an "axillary bud," which, when it grows, becomes a branch like its parent. In the case before us, the tubers are in all stages, from a simple bud in the axil, in some cases, to tubers as large as hazel-nuts in others, with the axillary buds, and in some cases leaves on them. The under-ground tuber devel-opes in the same way from an axillary bud, the only difference being that it pushes clear out from its parent axil, retaining an attachment only by a thread, or, technically a stolon. - Ed. G. M.]