Epiphytal. _Pseudobulbs_ elongate-oblong, compressed, narrowed to the top, three to four inches or more in length, clustered, monophyllous. _Leaves_ broadly oblong, acute, narrowed to a cuneate base, keeled. _Scape_ radical, from four to six inches high, about four-flowered, with two or three oblong acute scarious bracts below the raceme. _Flowers_ half expanded, white, with two orange-coloured spots in the centre, the club-shaped furrowed ovary decurved; _sepals_ linear-lanceolate acuminate, undulated, narrowed to the base, pure white; _petals_ similar to the sepals both in size, form, and colouring; _lip_ indistinctly three-lobed, subquadrate, the rounded side lobes meeting over the throat, the front lobe larger, retuse, one and three-quarter inch broad, having on each side of the throat an orange-coloured blotch, the blotches meeting to form a central eye, and a slightly elevated line at the narrow base; the claw adnate to the base of the column, and then involute, so as to enclose the upper part of this organ. _Column_ clavate, terete. Pilumna nobilis, _Reichenbach fil._, in _Linnæa_, xxii., 843; _Id._ in _Walpers’ Annales Botanices Systematicæ_, iii., 541. Pilumna fragrans grandiflora, _Linden_, _Catalogue_. Trichopilia fragrans nobilis, _Linden et André_, _L’Illustration Horticole_, 3 ser., t. 94. This small genus was established for the Orchid known as _Pilumna fragrans_, a species bearing considerable resemblance to our present subject but having smaller flowers. The great authorities—Reichenbach, Bentham, &c.—now refer these plants to the genus _Trichopilia_, but we have hesitated to follow them, as they appear sufficiently different from the Orchid growers’ point of view to be allowed to enjoy the distinct appellation which was originally given to them by Dr. Lindley, the greatest of English authorities on Orchidaceous plants. This pretty epiphyte, then, may be taken to represent a small genus of interesting and useful—because free-blooming—plants. The particular species now illustrated and described, is a very lovely plant, and can be recommended as one of the best to be grown for decorative purposes, the flowers being extremely useful for bouquets and button-holes. They are pure white in colour, and have a delicious fragrance, and these are qualities which will always cause them to be held in favour. This _Pilumna_ is a species of free-growing habit, and very free in producing its flowers. It requires cool treatment, and takes but little room; moreover, it can be purchased at a moderate price, so that any one that has a small house will be able to obtain it, and when obtained to manage it. Thus it will be apparent that it is a most useful plant. Our drawing was taken from a plant which was cultivated in the Victoria and Paradise Nurseries, Upper Holloway.