To J. D. Hooker   28 [September 1874]

My dear H.

I sh^d. much like to know whence U. Amethystia comes: it has a most extraordinary bladder. U. nelumbifolia, I think you said, was from Brazil.— Will you ask Oliver to look at these 2 sp., & tell me, if he can, whether they are floating or fixed plants; I ask because I find crustaceans in bladders of both, so that if rooted they must be in very wet mud.¹

Ever yours | C. Darwin