Oncidium tigrinum, _Llave et Lexarza_, _Novorum Vegetabilium Descriptiones_, fasc. 2, 36; _Lindley_, _Genera and Species of Orchidaceous Plants_, 203; _Id._ _Folia Orchidacea_, Oncidium, No. 157; _Reichenbach fil._, in _Walpers’ Annales Botanices Systematicæ_, vi., 794. Oncidium Barkeri, _Lindley_, _Botanical Register_, 1841, Misc. 174; _Id._ _Sertum Orchidaceum_, t. 48; _L’Illustration Horticole_, t. 2; _Paxton’s Magazine of Botany_, xiv., 97. _Oncidium tigrinum_ is one of the most beautiful and distinct of the many yellow-flowered species of Oncids. It is a free-growing and free-blooming species, of compact growth, with a moderate-sized branching spike, and flowers of long duration. It blooms at a time, in autumn, when Orchid flowers are most welcome. Another good quality of this plant is, that it will thrive well in the cool house, with Odontoglots, the bright colour of its blossoms proving to be extremely effective among the white flowers of _O. Alexandræ_. It grows about the same size as that plant, and has good evergreen foliage, which is a great attraction in any plant, and helps to show the flowers off to advantage. Our drawing, which was taken from a specimen grown in the Victoria Nursery, represents one of the best forms we have seen. There are smaller varieties of this species, but they are all worth cultivating on account of their showy colours. This was, at one time, a rare plant, but latterly our collectors have been able to import it more freely. _Oncidium tigrinum_ is, as we have remarked, an evergreen species, with dark brownish green pseudobulbs, about three inches in height; and usually produces two leaves, about a foot in length, of a lively green colour, and a branching spike growing two feet long, and furnished with many handsome blossoms—the sepals and petals of which are greenish yellow, spotted and barred with brown, and the lip is bright yellow. It blooms during the autumn and winter seasons, and continues in bloom for six weeks. We grew this plant many years ago under the name of _O. Barkeri_; it was very rare at that time, and we grew it with the Cattleyas, but we have found since, that it succeeds well in the Odontoglossum house. Since the plants may be bought at a cheap rate, many duplicates of this species should be grown, for its brilliant golden flowers produce a grand effect among the white and delicate tints of _O. Alexandræ_. The yellow colour is required for contrast, and their spikes being similar in habit of growth, they associate well together.