WITH respect to the question started in the number for June 12 of this journal as to the Ground Ivy, it may be said that in Glechoma, as also in Origanum vulgare, Thymus serpyllum and vulgaris, and Mentha vulgaris, specimens having flowers with small corolla and undeveloped anthers are very common, I think as common as specimens having flowers with large corolla and the two sexes developed. Also of Mentha aquatica and Prunella vulgaris specimens with smaller corolla and only pistils developed are found, but much more rarely than those of the other form.