M., Newcastle, Del. says: " I have heard that the willow in this country has but one sex. Is this correct, and how is it?"

[This probably refers to the common weeping willow, which, up to quite recently, was represented only by the female form. The original willow probably came from China, and as it is increased by cuttings, the plants are all, both in this country and in Europe, of the sex of that original tree, which chanced to be female. Of late years, however, the male form, under the name of Salix japonica, has been introduced. We have now the two sexes, but the male is not so pendulous or so graceful as the old one. The female will therefore continue to be the weeping willow. - Ed. G. M.]