"The genus Cryptocoryne (Araceae) was established by Fischer for
the reception of two Indian species, Cryptocoryne spiralis and Cryptocoryne
ciliata, which had been described under Ambrosinia by Roxburgh.
Additional species were described by Roxburgh, Schott, and other
botanists, while in Beccari, Malesia, Engler described eleven new species
from Borneo and gave a conspectus of twenty-four known species. In
Flora British India, Hooker enumerated sixteen species, and in Flora of
Ceylon, five species. The total number of species is now over thirty,
confined to the Eastern Tropics." - T. Petch, Notes on Cryptocoryne, 1928.