callosities upon the disk of the latter distinguish it positively. 
In E. odoratissimum the disk is simply thickened and flat- 
tened and gradually thins away towards the base; in 
E. gracile it is distinctly two-ribbed, and has two obsolete 
teeth a little below the middle. 
The want of beauty in this plant is amply compensated 
for by its delicious fragrance, early in the morning and at 
night. It seems as if it were more terrestrial than epiphy- 
tal, and grows freely in any light well drained soil. The 
patch sent home by Mr. Lees consisted ofa mass of pseudo- 
bulbs nearly two feet in diameter. 
