I do not think it necessary to adhere any longer to Dr. Lindley's distinction (as noted in the 'Folia Orchidacea') of a "major" variety, for this is now found to pass insensibly into the ordinary type. The former has sometimes been confounded with the _O. gloriosum_ of Reichenbach, but this is a perfectly independent form, and as such will shortly be figured in this work. DISSECTIONS.--1. Front view of lip and column; 2. Side view of ditto: _magnified_. [Illustration] Plate X [Illustration: Odontoglossum carinatum.] PLATE X. ODONTOGLOSSUM CARINIFERUM, _Reichb. fil._ KEEL-PETALED ODONTOGLOSSUM. O. (XANTHOGLOSSUM) pseudobulbis oblongis 1-2-phyllis, foliis loratis scapo paniculato brevioribus, sepalis petalisque oblongis acutiusculis basi subcuneatis dorso carinâ crassâ auctis pergameneis, labello membranaceo sessili ligulato dimidio anteriori subito in laminam reniformem denticulatam medio antice apiculatam extenso, lamellis rhombeis extrorsum biquadridentatis supinis utrinque in ligulâ labelli basilari, raphi utriusque lamellæ carinatâ antrorsum in tres digitos excurrente, columnâ elongatâ, alis elongatis crenulatis hyalinis inferioribus 2 utrinque obtusatis, crassioribus columnâ vix marginatâ. (_Reichb. fil. in Bot. Zeitung_, 1852, _p._ 638.) ODONTOGLOSSUM CARINIFERUM, _Lindl. Fol. Orch._ Habitat in AMERICA CENTRALI, _Reichenbach_. DESCRIPTION. PSEUDOBULBS _3 or 4 inches long, oblong, smooth, bearing 2 broadish, leathery, sharp-pointed_ LEAVES. SCAPE _longer than the leaf, panicled with zigzag branches_. BRACTS _triangular, short_. SEPALS _and_ PETALS _1 inch long, greenish outside, but of a purplish-brown inside, distinctly keeled at the back_. LIP _yellowish-white, sessile, ligulate at its base, but suddenly changing into a broad reniform plate, which is apiculate in front, and at its base adjoins the crest, which consists of 2 nearly prostrate, irregularly toothed, rhomboid lobes on either side, with 3 finger-like processes in front_. COLUMN _elongated, with transparent crenulate wings, its anther-bed scarcely margined_. For the opportunity of figuring this pretty _Odontoglossum_ I am indebted to the kindness of the Bishop of Winchester, in whose collection at Farnham Castle it flowered profusely in November last. A fortnight afterwards I also received specimens from Mr. Rucker, but the flowers of his variety were scarcely so bright in their colouring as those of the Bishop's plant. _O. cariniferum_, although now figured for the first time, appears to have been introduced several years ago to German collections, and from some of these it has, no doubt, found its way to England. It is a native of Central America, where it probably affects a high elevation, as it succeeds perfectly under cool treatment, both at Farnham Castle and at West Hill. Its flowers continue in perfection for many weeks. DISSECTIONS.--1. Front view of lip and column; 2. Side view of ditto: _magnified_.