Tas, 6820. 
ODONTOGLOSSUM CERSTEDII. 
Native of Costa Rica. 
Nat. Ord. OrncHIDEZ.—Tribe VANDER. 
Genus OpontoaLossum, Humb. Bonpl. et Kth.; (Benth. et Hook.f, Gen. Pl. 
vol. ii, p. 561.) 
OponToecLossum (Isanthium) Cirstedii ; humile, pseudobulbis ovoideis teretius- 
culis lzvibus, folio lineari-obiongo v. elliptico-lanceolato in petiolum angustato, 
racemo suberecto paucifloro, floribus albis labello basi aureo, sepalis late 
oblongis apiculatis, petalis consimilibus sed paullo minoribus et in unguem 
brevem angustatis, labello sessili 3-lobo, lobis lateralibus parvis brevissimis 
auriculeformibus recurvis, terminali explanato orbiculari bifido, callo basi 
quadrato elevato disco depresso margine postico ciliato, columna aptera, 
O. Erstevit, Reich. fil. in Bonplandia, vol. iii. p. 214, and in Walp. Ann. vol. vi. 
p- 845; Xenia Orchidacea, vol. i. p. 189, t. 68; Beitrag. Orchideen 
Central-Ameriks. pp. 15, 47, and 71, and in Gard. Chron, vol. vii. (1877), 
pp. 302 and 811, fig. 128. 
According to Dr. Reichenbach this very distinct little 
Odontoglot was discovered by Warscewicz in 1848, who 
made a rough sketch of it; but it was not well known till 
the learned orchidologist alluded to described it in Bon- 
plandia from dried specimens procured by Drs. Mirsted, 
Wendland and Endres, in Costa Rica, on Mount Irasu, 
near the town of San Juan, at an elevation of 9000 feet 
above the sea. It having been described first from dried 
specimens, the pseudobulbs were supposed to be two-edged, 
and the peduncle one-flowered, neither of which is the case, 
as shown in the excellent woodcut in the “ Gardener’s 
Chronicle,” and in our plate. The purple spots noted as 
occurring in the original specimens are replaced in ours by 
orange ones on the yellow base of the lip, and the three 
yellow lines by a square yellow disk with faint orange lines 
upon it. These are all matters as to which great variability 
is to be looked for. 
Odontoglossum Cirstedii was, I believe, first flowered in 
Europe by Messrs. Veitch in 1877. It blossoms in the 
Royal Garden from February to May, the flowers lasting a 
JUNE lst, 1885. 
