ODONTOGLOSSUM ROEZLII. 
[PLATE 64. | 
Native of Colombia. 
Epiphytal. Pseudobulbs narrowly-ovate, two inches long, compressed, with acute 
margins. Leaves eclongately linear-lanceolate, acuminate, nearly or quite a foot in 
length, keeled behind, and, there marked with nine nervose strix, the colour a clear 
pale green. Scapes short, slender, terete, three to six-flowered (according to Rchb.), 
erect, with subulate pale green bracts shorter than the pedicels, which pass gradually 
into the slender grooved ovary. lowers three to four inches across, flat, exceedingly 
chaste and effective ; sepals obovate-oblong acute, sub-equal, snow-white ; petals similar 
to the lateral sepals in form, but rather broader, pure white, marked with a distinct 
transverse purplish-red band at their base; lip large, two and a half inches across, 
broadly obcordate, or cuneately flabellate, obtusely bilobed, with a mucro in the sinus, 
sagittate or bearing a spur-like horn directed upwards and backwards on each side 
at the base of the short claw, and having three short slender keels on the disk in 
front of the horns, and a pair of short calli interposed; the disk has a largish 
yellow blotch streaked with red, while the rest of the surface is snow-white. Colwmn 
short, wingless. 
OportocLossum Rorziu, Reichenbach fil., in Gardeners’ Chronicle, 1873, 1802, 
fig. 269; Id. Xenia Orchidacea, t. 182, fig. 1; Hooker fil., Botanical Magazine, 
t. 6085; Bateman, Monograph of Odontoglosswm, t. 80; Floral Magazine, ser. 2, t. 90. 
This grand Odontoglot, which has been designated “a first-class beauty,” and 
which comes near to Odontoglossum veaillarium, was introduced in 1873 by Mr. B. 
Roezl, the very successful traveller and Orchid hunter, who has so well worked up 
the greater part of the Western hemisphere in the search after these plants, and to 
whose zeal and energy Orchid growers are so deeply indebted for the many rich gems 
he has introduced to cultivation. The species was most properly named by Professor 
Reichenbach after Mr. Roezl, and we are glad to be able to figure it, in order to 
remind Orchid growers how much they owe to the unflinching perseverance of one 
who has now retired from active life among his favourites. The best compost in 
which to cultivate this plant, is a mixture of peat and moss, with good drainage. 
| Odontoglossum Roezlii is one of the few Odontoglots that require to be grown in 
a warm temperature. The Cattleya house will be found to be the best position for 
it, and if the plants are suspended either in pots or in baskets from the roof of the 
house, where a copious supply of water can be given to them, they will be found 
to thrive well. This species is particularly liable to the attacks of _ thrips, and 
great care should be exercised in searching for and destroying them. We have found 
flowers of sulphur mixed with water, and applied to the young growths with a 
