Odontoglossum obscurum C. Schweinfurth nom. 
nov. 
Mesospinidium Wallis Reichenbach filius in Linnaea 
41 (1876) 106, non Odontoglossum Wallisii Linden & 
Reichb. f. (1870). 
As illustrated by a series of floral analyses from the 
Reichenbach Herbarium, Mesospinidium Wallisii has the 
basal part of the lip parallel to the column with the an- 
terior half abruptly reflexed. It seems, therefore, to be 
clearly referable to the genus Odontoglossum. 
Since the specific epithet, Wadllisii, has already been 
used under Odontoglossum, the new name obscurum is 
proposed, in allusion to the fact that the pseudobulb and 
leaves were unknown when the species was described. 
Except for the lip, which is described and illustrated 
as retuse at the apex and emarginate in the middle [of 
each side], this concept might reasonably be referred to 
Odontoglossum longifolium Lindl. 
Odontoglossum Wyattianum G. Wilson in Orch. 
Rev. 36 (1928) 47. 
In the diagnosis of this species there is no description 
of the vegetative parts of the plant nor of the inflores- 
cence. With regard to the flowers, only the size and color 
are noted; there is no mention of the exact shape of the 
parts. Finally, the precise origin of the species is doubt- 
ful, for the description merely states that ‘‘the plant had 
been obtained from the Rev. Paul Wyatt, Bedford, to 
whom it had been forwarded by a friend in Peru, doubt- 
less its native country. ”’ 
It seems advisable, at the present time, to relegate 
this concept to the class of obscure species. 
Oncidium falcipetalum Lindley Orch. Linden. 
(1846) 14, no. 76; Fol. Orch. Oncidium (1855) 5, no. 7: 
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