it. There are however some essential differences between 
them, especially in the form of the labellum, and in the far 
greater degree of obliquity in the insertion of the back sepal 
in A. epidendroides ; it is moreover probable from the dried 
specimens of the latter that its flowers are whole coloured ; 
I have subjoined a character by which it may be distin- 
guished. 
In the same collection of unpublished drawings, belong- 
ing to Baron Delessert, to which I have already referred (fol. 
1904), there is a figure of a third species of this genus. It 
has oblong smooth not two-edged pseudo-bulbs, solitary much 
larger scentless flowers, of which the sepals and petals are 
yellowish green blotched with crimson, and the lip and 
colimn pure white, with a faint purplish crescent-shaped 
stain in the middle of the lip. M. Descourtilz found it on 
the Cedrela in Brazil, in the district of Bananal. A variety 
of it is mentioned by him with a pale lilac lip, the stain on 
which is deep violet. He also represents the pollen masses 
as each furnished with a separate caudicula ; if this is correct 
it will be an additional reason for doubting how far that 
character is of importance in distinguishing Cons. 
Of the dissections in the accompanying plate that in the 
centre represents a magnified view of the column and the 
base of the labellum ; the other the pollen masses with their 
caudicle and gland seen from behind. 
A. epidendroides (Gen. & Sp. Orch. p. 139); pseudobulbis oblongis ancipi- 
tibus, sepalis lineari-oblongis acutis, petalis obtusis concavis, labelli lobis 
lateralibus rotundatis integerrimis, intermedio crenulato emarginato. Pa- 
nama and Columbia occidentalis. 
A. lunata ; pseudobulbis oblongis compressis levibus, sepalis petalisque linea- 
ribus obtusis patentissimis, labelli lobis lateralibus nanis intermedio plano sub- 
quadrato undulato, floribus solitariis. Brazilia. Sepala et petala luteo- 
viridia, sanguineo-maculata.  Labellum album maculà lunatà in medio. 
Flores inodori. 
