ODONTOGLOSSUM KRAMERI, _Reichenbach fil. in Gard. Chron._ 1868, p. 98. _Floral Mag._ _t._ 406 (_sub O. Krameri_). _Hooker in Bot. Mag._ _t._ 5778. Habitat in COSTA-RICA. DESCRIPTION. PSEUDOBULBS _nearly round, flattened, 2-edged, 1-leaved_; LEAVES _oblong-lanceolate, leas than a foot long, by about an inch wide, longer than the_ SCAPES _which bear from 2 to 5 flowers_. PEDUNCLES _with the ovary one to one and a half inches long_. FLOWERS _one to one and a half inches in diameter_. SEPALS _and_ PETALS _subequal oblong-acute, pale violet-red in the centre with broad white margins_. LIP _one-third of an inch wide, neck short, broad, deeply hollowed in front with two erect calli; limb subquadrate, two-lobed at the apex, angles rounded, the basal lateral lobes small, reflexed, pale violet-red with two confluent semilunar white patches at the base, on each of which is a concentric red-brown band, and a few spots of the same colour on a golden yellow ground_. COLUMN _short, thick, without wings or appendages_. (Hooker, l. c.) This though not a striking is a very distinct plant. It is a native of Costa-Rica, where it seems to be plentiful enough though it long eluded detection. It was first exhibited in 1868 by Mr. Veitch at one of the shows at S. Kensington, but appeared almost simultaneously in the collection of Mr. Day, by whose direction a careful drawing was prepared. Like other Costa-Rica plants, though not requiring a high temperature, it is scarcely content with the small amount of heat that is now allotted to the great majority of cool Orchids. Its proper place would be in the Mexican House. It is a free bloomer. Plate 25 [Illustration: Odontoglossum cordatum.] PLATE XXV. ODONTOGLOSSUM CORDATUM. HEART-LIPPED ODONTOGLOSSUM. O. (EUODONTOGLOSSUM) pseudobulbis oblongis compressis monophyllis, foliis lato-oblongis planis acutis scapo squamis carinatis vaginato brevioribus, racemo simplici vel paniculato, bracteis navicularibus acuminatis membranaceis, ovario multo brevioribus, sepalis petalisque lineari-lanceolatis acuminatissimis, labello cordato acuminatissimo integerrimo, appendice unguis carnosâ apice bilobâ basi utrinque dente unico auctâ, columnâ pubescente clavatâ subapterâ. ODONTOGLOSSUM CORDATUM, _Lindl. in Bot. Reg._, 1838, _misc._ 90; _Knowles and Westcott_, _Floral Cabinet_, _t._ 100; _Paxton's Mag._, xiii. 147; _Regel. Garten-flora_, 1862, 356; _Pescatorea_, i. 26. Habitat in MEXICO, _Barker_. GUATEMALA, _Hartweg_, _Skinner_. DESCRIPTION.