borrowed from New Latin Cryptomeria, genus name, from crypto-crypto- + -meria, borrowed from Greek -mereia "condition of having parts (of such a kind)," derivative of -merēs "having parts (of such a kind)," adjective derivative of méros "part" — more at merit entry 1
Note:
Genus name introduced by the Scottish botanist David Don (1799-1841) in Annals of Natural History, vol. 1 (1838), p. 233-34. In a later publication ("Descriptions of two new Genera of the Natural Family of Plants called Coniferae," Transactions of the Linnean Society of London, v. 18 [1841], pp. 163-79), Don states that the generic name was suggested by "the concealed position of the reproductive organs" (p. 171).