I now come to the flower which I have supposed to have attracted your attention, and you will find, upon a minute examination, that it has a corolla divided into two distinct parts, the upper one standing up like a hood or helmet, and the lower one hanging down like a pouting under lip. It is this last which gives you a clue to find out what the plant is, as you perceive immediately that it belongs to the Labiàtæ, or lipped plants. You may then turn to any work you may possess on the British wild flowers, when, if the text is arranged according to the natural system, you will find your plant under the head of Labiàtæ, and, if the work has coloured plates, you will recognise it without any further trouble; but, if the work has no plates, you must endeavour to identify it by the description, and finding your plant has a square solid stem, soft, hairy, heart-shaped leaves, which taper gradually to a point, and that the lower lip of the flower, which is much larger than the helmet, is spotted, you discover that the plant agrees in description with the common woundwort (_Stàchys sylvática_.) If you want to find it in Sowerby's _English Botany_, you had better take the second edition of that work, where you will find the plant in question in the Linnæan class and order Didynàmia Gymnospérmia, from two of the stamens being longer than the others, and the seeds being what is called naked, that is, not enclosed in any visible pod or other seed-vessel. This will appear difficult to you at first; but, as I think you have told me that your husband understands botany, it will be an amusement to him to explain to you at his convenience the principles both of the Linnæan and the natural systems, and to leave you to make a practical application of them in your morning walks.