In the next house were many fine examples of _Odontoglossum Alexandræ_, _O. Pescatorei_, and others making good pseudobulbs; also Masdevallias and many other good plants. We noticed a splendid _Zygopetalum Mackayi_, so called, but we think it was distinct from any we have seen, the colour being intense, and the lip of a very rich purple.—B. S. W. [Illustration: PL. 116. AËRIDES VANDARUM.] AËRIDES VANDARUM. [Plate 116.] Native of India. Epiphytal. _Stems_ terete, flexuose, rooting, clothed with the sheathing bases of the leaves, growing two feet or more in height, of it purplish brown colour. _Leaves_ distant, harsh in texture, four to six inches long, as thick as the stem, subulate, terete narrowed to an acute point, with a narrow furrow on the upper side, evergreen. _Peduncle_ lateral, opposite the leaves, one or two flowered. _Flowers_ rather large, delicate but durable, white; _sepals_ spreading, the dorsal one ligulate with a stalk-like base, the lateral ones subcrenulate united to the foot of the column, the margins always undulated; _petals_ obovate cuneate, undulated; _lip_ tripartite, the lateral (basal) divisions linear-falcate, toothletted, the middle one deeply two-lobed, the lobes reniform, concave, crenate narrowed at the base into a claw, with a small toothed segment on each side and a sharp keel between; _spur_ extinguisher-formed. _Column_ short, wingless. _Pollen-masses_ two. Aërides Vandarum, _Reichenbach fil._, in _Gardeners’ Chronicle_, 1867, 997. Aërides cylindricum, _Hooker_, _Botanical Magazine_, t. 4982, non Lindley; _Gardeners’ Chronicle_, N.S., iii, 537, fig. 115. There is no doubt that the species of _Aërides_ rank among the most beautiful of the East Indian Orchids. The one we now introduce to the notice of our readers is very distinct in its manner of flowering, and also in its foliage, the general aspect of the plant being much like that of _Vanda teres_, whence the name given it by Professor Reichenbach of _Aërides Vandarum_. The flowers are large and the manner of its growth makes it a very interesting subject. Few cultivators, however, have seen it in blossom. Our artist took a sketch last March from a plant blooming at the Victoria and Paradise Nurseries, where it flowered for several weeks. _Aërides Vandarum_ is an evergreen species and grows about two feet in height. The foliage is terete and acutely pointed, like that of a small growing _Vanda teres_ and the stem is of a purplish brown colour. It produces two flowers on a spike, and these are of a pure white colour; it blooms in March and April, and lasts three weeks in perfection.