respondence with botanists throughout the Union, to obtain from them 
the species peculiar to their respective localities ; and has thus been en- 
abled to include, in his two parts, rather more thana a quarter of the 
known species of this vast ee ; of which ro pacsenia ieee are found 
in almost every part of the globe. 
The time and exertion requisite for such a work as this of Dr. Sart 
well, can only be estimated by the practical collector, who has to 
through bog and brake, ‘ from morn till dewy eve,” loaded with his 
folios and collections. But the search for the various species, 
drying and preparation of specimens, so beautiful as those before us, is 
a matter requiring much time and care ; even in the case of so practised 
& hand as Dr: Sartwell. No reasonable price would be a compensation 
for the production of such volumes, and hence they rarely appear, except 
when offered as labors of love, and gratuitously distributed, as in the 
present’ instance. Dr. a has, for many years past, takonuas 
especial interest in these plants, a 
he eye, has selected ok arranged his specimens: with great 
Each species ies — sheet, to which is ane 
a ephmed label with number, name and synonymes, place of growth, am 
name of collector, when derived from ies hands than his own. 
numerical order of the specimens is that of Dr. Gray’s Manual of: Bot- 
aBy, ct ay _ we shall briefly remark on a few of the species. 
‘No. oica, L.”—This is C. gynocrates, Wormsk., and 
though ery soa resembling C. dioica, differs fro fri species In 
several particulars ; especially by the shorter, loosely lowe red sp 
and the lanceolate, diverging perigynia, which are tid disttnodld nerved, 
and smooth, or very slightly serrulate on the beak. C. dioica pean 
ably confined, on this continent, to Arctic America and: nig 
Mountains. 
* No. 12. C. Sartwellii, Dew.”—This plant, first colleaied in New 
York, by Dr. Sartwell, was dedicated to him by Professor Dewey 30n 
years since ; but it does not appear to possess any sufficient characte 
by which it can be distinguished from No. 71, C. disticha, Huds: its ry 
variable species, in different localities and stages of  iage se ties 
“No. 14. C. prairea, Dew.”—If this is specificall inet from 
C. paniculata, L, (which is very doubtful,) it will probably pte 
the prior name o of C. Ehrhartiana, Hoppe, to which it _ aaa 
red by Dr.’ Boott. 
* No, 21. 6, cephaloidea, Dew.,” pai to be ile a stouter form 
of No. 22, C.c = roa pian Mubl. ;° but No. 75 (from Illinois) 1 
doubtless, the plant of Dewey, w which i is sails diaiaguicheey, 
No, 20, C. spar eniontbs: Muhl., except from its inferior size 
«No. 29. C. gracilis, Ehrh.”—Dr. Boott has ascertained, a 
authentic specimen, that this name belongs to C. loliacea, L. 
commonly 
that of Schkuhr, C. tenella, will attach to this species, ¢ own 
to American botanists as C. disperma, Dew , 
“No. ‘33. C. spherostachya, gn if distinct from Cc. canescens, Le 
must bear the prior name of Fries, C. vitilis. 
wa No. 40. C. Liddoni, Bott,” es surely nothing rors 
form of No. 11, C. siccata, Ao Bo ; 
pom 
ge Boi Bb ee a let 
ead gaa ee 
