‘Tas. S7&0. 
ODONTOGLOSSUM prRAEVISUm. 
Colombia. 
ORCHIDACEAE, Tribe VANDEAE, 
Oponroctossum, H. B. et K.; Benth, et Hook. f. Gen. Plant. vol. iii. p. 561. 
Odontoglossum praevisum, Rolfe in Orch. Rev. 1904, p. 176; 1915, pp. 101, 
155; hybrida inter O. glorioso, Lindl. et Reichb. f., et O. Lindleyano, 
Reichb. f., artefacta. 
Herba epiphytica. Pseudobulbi aggregati, ellipsoideo-oblongi, 5-7 cm. longi, 
2°5-8 em. lati, apice diphylli. Folia ligulata, subobtusa, recurva, 
25-830 em. longa, 2°5-8 em. lata. Inflorescentia lateralis, paniculata, 
80-40 cm. longa, multiflora; bracteae ovatae, cucullato-concavae, 0°5- 
0-7 cm. longae; pedicelli graciles, cirea 2 cm. longi. Flores mediocres, 
flavi, brunneo-maculati. Sepala et petala patentia, lanceolata, acuminata, 
subundulata, 2°5-3 cm. longa. Labellum late unguiculatum; unguis 
erectus, conduplicato-concavus, 1 cm. longus; limbus patens, deltoideo- 
ovatus, acuminatissimus, undulatus, subconvexus, circiter 2 cm. longus, 
apice recurvus; discus crista erecta biloba puberula instructus. Colwmna 
clavata, 1:5 em. longa; alae falcato-lineares, acuminatae, circiter 3 mm. 
longae.—R. A. Roure. 
Since the introduction, more than half a century ago, 
of O. crispum, Lindl., orchid growers have found that, 
among their plants of repeated importations, occasional 
examples, on coming into blossom, prove to belong to one 
or another of three species other than O. crispum. This 
is not surprising. Mr. Rolfe has shown (Orchid Review, 
vol. i. p. 277) that, in the district of Bogota in Colombia, 
0. gloriosum, Lindl. & Reichb. £., O. Lindleyanum, Reichb. 
f., and O. luteopurpureum, occur naturally in association 
with QO. crispum, and the casual inclusion of one or other 
of the three in what was believed to be an unmixed 
parcel of O. crispum is intelligible. What has been more 
puzzling to growers has been the occurrence among their 
plants of forms that on flowering proved to be unlike any 
of the four species named. Their intermediate characters 
suggested that such forms must be of hybrid origin, though 
their precise parentage has often been in doubt. When 
dealing with these hybrids Mr. Rolfe pointed out that 
OcropeR-DEcEMBER, 1918. 
