Hoya imperialis Pink and Hoya imperialis Red, how do leaves differ ?

It is not easy to identify the leaves of Hoya imperialis red and pink, but when the plants are several years old the differences are more contrasted : the leaves on imperialis red are narrower, longer and slightly less undulate than on pink imperialis.
With Hoya imperials length and width are better indicators than the undulation : some individuals can be almost equally undulated.

 

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