insani 
PREFACE, - xi 
when [ eonsider that the small collection communicated 
.. to me, consisting of about one hundred and fifty speci- 
mens, contained not above a dozen plants well known to 
me to be natives of North America, the rest being either 
entirely new or but little known, and among them at 
least six distinct and new genera. This may give an - 
idea of the discerning eye of their collector, who had 
but little practical knowledge of the Flora of North 
America, as also of the richness of those extensive re- 
ciate mew. ER GIT — — 
mens were nes perféef; " have nemi i in ihe: ee work 
in their respective places, distinguishing them by the 
words *€ v. s. in Herb. Lewis." Several of them I have 
had an. opportunity of examining in their living state, 
some being cultivated from seeds procured by Mr. Lewis, 
and:others since my arrival in Deum. from seeds and 
plants intr duced by Mr. Nuttall. | 
» Here mot refrain. indomita aidia: 
future botanists travelling those regions, to two highly 
inizienting: plants, of which I have only seen imperfect 
specimens. - The first is what Mr. Lewis in his journals 
calls “ the Osage Apple," or ** Arrowwood of the Mis- 
souris," This is a tree, or wes shrub, with leaves re- 
sembling those of a pear-tree, but broader in propor- 
tion ; they are alternate, and have a recurved thorn near 
their base; the flowers are of separate sexes, and appear 
axillary, peduncled, globular catkins, which produce 
i qubd: fruit, in size and colour resembling 
an orange, in interior structure approaching near to the 
genus Morinda. This shrub, on account. of its fruit 
