Other varieties are hirtum, distinguished by the hairiness of the leaves and branches, and purpureum, which has the leaves suffused with a dull purple tinge.
There are, however, certain botanical differences connected with the arrangement and hairiness of the leaves which separate the two species.
Although described in 1889 as a local variety of the Siberian species, the Manchurian roe really appears, both as regards stature, hairiness and the black and white markings on the muzzle, much more nearly related to the European animal.
The external unlikeness of the apes to man depends much on their hairiness, but this and some other characteristics have no great zoological value.
Here the younger brother impersonated the elder, and succeeded in deceiving his blind father by imitating the hairiness of his brother.