28 Mr, Ha worth's new Arrangement of the Genus Aloe. 
are white. Colour, I have observed above, although 
unstable and not to be depended on in most 
plants, is often in Aloes the best and most perma- 
nent mark of specific distinction. 
dorsalis. Aloe foliis ensiformibus acuminatis : mar«inibus dor- 
soque valde spinosis. Munting. Aloidar. cumicone. 
Obs. This species may follow A. barbadensis in 
my arrangement. 
II. On 
