slender and fragile structures, apparently not more substantial than the gossamer and flexible as a feather, still possess a tenacity and wiriness which allow the delicate leaf to be raised by the hand to the surface of the water without injury." No natural order of plants has created or continues to create a greater degree of interest amongst travellers and botanists than the _Orchidaceae_, of which more than three thousand species have been described; the anomalous structure of their reproductory parts, the singularity in form of the floral envelopes, the grotesque resemblance which many kinds bear to some object or other of the animal world, the rarity, beauty, and delicious fragrance of some forms--all combine to render these plants of great value and interest. As inhabitants of hot and damp localities, orchids are in general epiphytes, as in the Brazilian forests, in the lower portions of the Himalayan mountains, and in the islands of the Indian archipelago; when they occur in temperate regions they are terrestrial in their mode of growth; in extremely dry or cold climates, orchidaceous plants are unknown. Two rare and beautiful epiphytal orchids, the _Angraecum sesquipedale_ and _A. superbum_, were obtained by Mr. Ellis in Madagascar and Mauritius, and introduced into this country. Of the former, the largest flowered of all the orchids, Dr. Lindley has given the following description: "The plant forms a stem about eighteen inches high, covered with long leathery leaves in two ranks, like _Venda tricolor_ and its allies; but they have a much more beautiful appearance, owing to a drooping habit, and a delicate bloom which clothes their surface. From the axils of the uppermost of these leaves appear short stiff flower-stalks, each bearing three and sometimes five flowers, extending seven inches in breadth and the same in height. They are furnished with a firm, curved, tapering, tail-like spur, about fourteen inches long. When first open, the flower is slightly tinged with green except the tip, which is almost pure white; after a short time the green disappears, and the whole surface acquires the softest waxy texture and perfect whiteness. In this condition they remain, preserving all their delicate beauty, for more than five weeks. Even before they expand, the greenish buds, which are three inches long, have a very noble appearance."