Entered according to an act of Congress, in the year 1840, by
WILEY & PUTNAM,
In the Clerk’s Office of the District Court of the Southern District of New-York.
PRINTED BY 3. V. WRIGHT,
18 New street, N. Y.
SIB WILLIAM JACKSON HOOKER, K. H, LL. D,
REGIUS PROFESSOR OF BOTANY IN TH E UNIVERSITY OF GLASGOW, ETC ., ETC.,
W H O SE NAME IS ID E N T IF IE D W IT H
NORTH AMERICAN BOTANY,
T H I S W O R K ,
WH IC H IS GREATLY IN D E B T ED TO HIS GENEROUS ENCOURAG EMENT,
IS MOS T R E S P E C T F U L L Y D E D I C A T E D
BY H I S O B L IG E D F R I E N D S ,
THE AUTHORS.