The three species which must now be described would hardly be recognized as Ferns at all by most people. It has been indicated in an earlier chapter that there is really some doubt as to their true position, but for the sake of convenience they are here included amongst the Ferns. All the British species of the family Ophioglosseæ are somewhat inconspicuous plants, owing to their habit of growing mixed up with a lot of herbage. _Ophioglossum vulgatum._ The generic name is formed of two Greek words—_ophios_, “a snake,” and _glossa_, “a tongue”; a reference to the fact that the barren leaf was thought to bear a resemblance to a snake’s tongue, though it must be confessed that the likeness is not very apparent. The word “vulgatum” is, of course, Latin for “Common.” The Common Adder’s Tongue. In this species the frond is very definitely divided into two parts, a leafy portion and a spike. These are borne on a stalk about six inches in length which arises from a fleshy root-stock. The roots of the Common Adder’s Tongue are quite coarse and entirely unlike the wiry roots of the majority of ferns. The leafy or barren portion of this curious frond is not divided in any way and is roughly egg-shaped. The fertile portion is in the form of a stalked spike, the spore cases being arranged on either side in double rows. The capsules are rounded in form and have no elastic ring, but open transversely when the contents are ripe. Attention should be called to the beautiful veining of the barren leaf of the Common Adder’s Tongue, which forms a perfect network through the green tissue. [Illustration: Ophioglossum vulgatum. The Adder’s Tongue.] The Common Adder’s Tongue is really very abundant in many parts of England. It should be looked for in damp meadows, and will probably be difficult to find without a close search. It is not so abundant in Scotland and Ireland. The only way to secure the plant safely for cultivation is to cut up a piece of turf, and remove the whole thing into a position where the soil is moist and rich. The Common Adder’s Tongue is not very often cultivated, as from the gardener’s point of view its decorative value is small. The new frond of the Common Adder’s Tongue is fully developed by June, and it disappears early in the autumn. _Ophioglossum lusitanicum._ Here the specific name is taken from Lusitania, the old designation of Portugal—a reference to the fact that the species is abundant in that country, as indeed it is in other parts of Southern Europe. The Little Adder’s Tongue. This plant is really a miniature addition of the former species. There is no doubt, however, that it is to be regarded as a distinct type, although at one time it was thought to be merely a variety of _O. vulgatum_. As far as the United Kingdom is concerned the Little Adder’s Tongue has only been discovered in one or two localities. Some years ago it was stated to have been found in Cornwall, and it certainly used to occur in Guernsey.