xT. 45.) TO W. J. HOOKER. 421 
Agassiz speaks most highly of it; but I think he 
has only looked rapidly through its pages as yet. . 
I am at this moment preparing to begin the pr a 
ing of the 2d edition of my “ Mearns of the Botany of 
the Northern States.” . 
In consequence of seis ile I shall take pains to 
classify the introduced plants, according to the degree 
of naturalization, ete. 
Many thanks for sending me your portrait. I am 
already quite rich in the likenesses of botanists, many 
of which adorn the walls of my apartments. . . . 
Believe me to remain, my dear friend, yours very 
faithfully and truly, Asa Gray. 
TO W. J. HOOKER. 
CAMBRIDGE, February 25, 1856. 
My pear Sir Writtam,— Holton is bringing 
out a book upon New Granada which will be interest- 
ae 
The cypress knee sent was the best and handsomest 
IT had, though not the largest. I am glad it pleases 
you. But you mistook what I said, or meant to say, 
which was, that tucked away in the hollow you would 
find placed a specimen of a forming knee, not much 
bigger than your knuckle, on a piece of root a foot or 
so long. Was this overlooked or lost? Please tell 
me; for I can replace it with another, and phy siolo- 
gically it would be well to show the formation in its 
various stages. . . 
I want to send i a book by a young friend of 
ours, Olmsted, on the seaboard slave States,’ an admi- 
rable eal full of information, and lively withal. 
1 A Journey in the Seaboard Slave States, with Remarks on their 
Economy. By Frederie Law Olmsted. New York, 1856. 
