_Thunia Marshalliana_, like its congeners is a free-growing plant, furnished with tall red stems. These stems are of annual duration only, and grow from two to three feet in height, perishing as soon as the flowering and growth is completed; they are thickly clothed with distichous leaves, which are of a pale glaucous green colour, and three inches or more in length. The flowers are produced in large terminal spikes, and have the sepals and petals white, and the lip white, beautifully veined and fringed with deep orange colour, margined with white. The plant generally blooms in June and July, and continues flowering on for several weeks; it makes a fine decorative subject, as well as a fine plant for the exhibition table. We have more than once seen some noble specimens shown at the Whitsuntide National Show of the Royal Botanic and Horticultural Society of Manchester. We figured the charming _Thunia Bensoniæ_ in our second volume at Plate 67, where will be found a full account of the treatment given to that beautiful species. _T. Marshalliana_ requires a similar mode of cultivation, and is propagated in the same manner. Oncidium Lanceanum, a very handsome variety of which is figured on the preceding Plate, was first discovered in Surinam by John H. Lance, Esq., by whom it was brought to England in the year 1834. In a letter quoted by Dr. Lindley in the _Transactions of the Horticultural Society of London_ (2 ser. ii, 100, t. 5.), Mr. Lance states that he first found it growing on the trunk of a large Tamarind tree, near the Government House, and that he subsequently met with a number of the plants in different parts of the colony, generally attached to the stems or branches of Tamarind, Sapodilla or Calabash trees. With him it failed to grow in rotten wood and light earth, but grew well when fastened to the branches of the Orange, the Soursop, the Mammee, and even the _Brugmansia arborea_, producing vigorous stems with upwards of twenty blossoms on each. The scent of the blossom Mr. Lance goes on to state “is extremely fragrant, and is retained after the flower is dried, only becoming fainter and more of a spicy flavour than when fresh. The plant remains in full beauty from ten or twelve days—a long period in that climate; and I found that it always required a shady situation, and a living stem to grow upon, without which it would not produce its flowers in the highest perfection.” Dr. Lindley, in one place, compares the fragrance to that of the Garden Pink, and in another to that of Vanilla. [Illustration: PL. 131. ODONTOGLOSSUM NEVADENSE.] ODONTOGLOSSUM NEVADENSE. [Plate 131.] Native of New Grenada.