_An Epiphyte._ PSEUDOBULBS _smooth, slightly compressed, sometimes broadly ovate, but occasionally tapering, 2 to 3 inches long, and bearing 1 or 2 linear lanceolate-pointed_ LEAVES, _which are from a few inches to a foot long, and frequently of rather lax character; a reddish tint is also sometimes met with both in the leaves and pseudobulbs_. RACEMES _always simple, about the length of--sometimes longer than--the leaves, and carrying from two or three to a dozen or more large membranous and beautiful_ FLOWERS, _which vary exceedingly both in size, form, and colouring. Usually they are from 2 to 3 inches in diameter, and about equal to the pedicels_. BRACTS _about half an inch long, pointed, fitting close to the stem_. SEPALS _lanceolate acuminate, white or rosy-white, with sometimes one or more brown or purple spots on each_. PETALS _usually--though not invariably--wider than the sepals, and resembling them in form and colour, but destitute of spots; both in the sepals and petals the edges are usually more or less curled or waved_. LIP _recurved at the apex, exceedingly variable in its outline; in some examples almost exactly resembling the sepals, in others taking more or less a panduriform shape (in which case the apex, instead of pointed, is round, emarginate, with a point or mucro); the edges too, which are sometimes entire, are much more frequently jagged or toothed; the short unguis, or claw, is longitudinally callose; and where it expands into the disk, ends in two straight pointed and diverging teeth, which, like the claw, are yellow, the rest of the lip being white, with or without spots of the same character as those found in the sepals; there are a few red or brown lines which radiate or spread out like a fan on either side of the teeth composing the crest, but they do not, as in_ O. PESCATOREI, _form a detached flap_. COLUMN _short, arched, club-shaped, with broad truncate wings that are more or less jagged or fringed_. This most charming _Odontoglossum_ was discovered in 1863 by Mr. Weir, at an elevation of from 7000 to 8000 feet, in the gloomy forests that clothe the slopes of the lofty mountain-ranges at the rear of the City of Santa Fé de Bogotá. As the wild specimens of the flowers that he sent home to the Horticultural Society indicated not only a new species, but one of surpassing beauty, I did not hesitate at once to dedicate it to the illustrious Princess whose name it will henceforth bear. Since the first description of the plant appeared in the 'Gardeners' Chronicle' many living plants have been received both by the Royal Horticultural Society and by Messrs. Hugh Low and Co., of Clapton, several of which have bloomed and, even in their first feeble attempts to flower, have more than justified the very high expectations formed of the plant which, as it gathers strength, cannot fail to become an established favourite with all Orchid-lovers.