_Var._ GIGANTEUM.—Habit more vigorous and more erect than in the ordinary form; stems stouter and less nodose, four to five feet long; flowers larger, and of stouter substance, otherwise as in the type. Dendrobium Wardianum giganteum, _Williams & Moore_, supra. Dendrobium Wardianum Lowii, _Smith_, _Moral Magazine_, N.S., t. 212. The flowers of the plant we now bring under the notice of our readers are of the most perfect form, of the richest colours, and also of very large size. It is altogether a stronger grower than the type of the species named in compliment to Dr. Ward, of Southampton, and of which a fine figure is published in Plate 19 of the first series of Warner’s _Select Orchidaceous Plants_. By a comparison of the two illustrations, it will be seen that the typical plant has much thinner and more tapering stems, and that the flowers are of a smaller size than in the variety now treated upon, though the colour and marking are equally brilliant in both. The larger form, _giganteum_, also comes from a different country, the smaller kind having been introduced from Assam, while the larger one comes from Burmah, which difference may account for the difference in their growth. Our sketch was taken from a plant in the collection of D’Alroy Salamon, Esq., of Clapham Park, where it has bloomed two years in succession. There is in cultivation a variety of _D. Wardianum_ with white flowers, which has been bloomed during the last two or three years from imported plants. It is quite interesting to find that in most of the principal genera white varieties are turning up to meet the growing taste for white forms of the different Orchids. _Dendrobium Wardianum giganteum_ is a deciduous plant, sometimes producing growths four or five feet long, with somewhat knotty joints all up the stems. The foliage is of a bright green colour, and begins to fall off after it has completed its growth. The sepals and petals are white heavily tipped with deep magenta-rose, while the lip is of a deep orange-yellow at the base, with two blackish crimson blotches, the tip of the lip being bright magenta-rose. It blooms during the winter and spring months according to the time of the completion of its growth. We have seen it in bloom in the month of October, so by having a number of plants started at different periods, it might be had in bloom for many months, some of the plants being retarded by keeping them dry in a warm house—for it is not safe to put them into a cold house, as this often injures the growth for the following year.