262 THE ORCHID REVIEW. 
imported by Messrs. Shuttleworth & Co., together with O. Rossii and O. x 
aspersum. The author, though regarding it as a very distinct species, 
added :—‘ Some who have seen the plant in flower ascribe a hybrid origin 
to it, supposing it to have been derived from O. Rossii crossed with some 
other species.” The figure shows a very remarkable flower, with short, 
broad, much spotted segments, but curiously enough, when the plant 
flowered again two years later, it had developed into the ordinary form of 
O. X aspersum, showing that the first flowers were quite abnormal. 
The foregoing seem to be forms of one variable hybrid, of which many 
plants are now known, and the following are the references to figures and 
descriptions :— 
Odontoglossum X Humeanum, Rchb. f. in Gard. Chron. 1876, v., p- 170; 
Reichenbachia, ser. 1ii., p.75, t. 82; Cogn. et Goossens Dict. des Orch., Od., t. 7. 
O. Rossii var. Humeanum, Veitch Man. Orch., i, p. 65. 
O. X aspersum, Rchb. f. in Gard. Chron., 1879, xi., 266; Orch. Album, 
Vi, £245. 
O. Rossii var. aspersum, Veitch Man. Orch. i, p. 65. 
O. Youngii, Gower in Garden, xxxvil, p. 84; Orch. Album, ix., t. 406; 
Rolfe in Gard. Chron., 1891, x., p. 670. 
ODONTOGLOSSUM XX VEXATIVUM appeared in the same. year as the 
preceding, and was described by Reichenbach, as follows :— ‘‘ This is most 
probably a natural hybrid. When one sees the very large inflorescence, 
with the spathaceous bracts and the wide flowers, broad horse-chestnut- 
brown sepals and much broader blunt acute white petals, spotted with 
certain nearly olive-green spots at the base, one thinks of Odontoglossum 
nebulosum. The blade of the lip is also like it, being broad, semi-ovate, 
blunt, acute, white, with a few olivaceous spots. The callus, however, 1s 
that of Odontoglossum maculatum, its anterior process being long, narrow, 
bidentate, with a blunt keel on its middle line, yellow, with small red 
blotches. The side view of this callus is quite unlike that of Odontoglossum 
nebulosum. The white column is clavate, wingless, as in both the species 
mentioned, covered with a light tomentum. The plant itself is just inter- 
mediate between the two species. The bulbs are pallid, as those of O. nebu- 
losum usually are, yet not so much convex and narrower. The leaves 
are more like those of O. nebulosum, wanting the interesting nervation 
of those of Odontoglossum maculatum. It is one of the special curiosities 
of Lord Londesborough’s garden. I had last spring a fresh spike through 
Messrs. Veitch, and obtained in October last another fresh spike, and an old 
dead bulb and leaf, through Mr. Denning’s kindness, at my second visit to 
the wonderful collection at Coombe Lane, near Surbiton.” 
In 1888 Reichenbach described Odontoglossaum maculatum Duvivieri- 
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