I think it is the most isolated group in the world, and the islands themselves well isolated from each other.
LETTER 349.

TO ASA GRAY.

Down, January 7th [1860].
I have just finished your Japan memoir (349/1.

"Diagnostic Characters of New Species of Phaenogamous Plants collected in Japan by Charles Wright.
With observations upon the Relations of the Japanese Flora to that of North America, etc.: 1857-59."-- "Memoirs of Amer.

Acad." VI.), and I must thank you for the extreme interest with which I have read it.