492 REVIEWS. 
In the second edition, which appeared in 1856, 2,426 species of Flower- 
ing Plants, and the higher Cryptogams, or flowerless plants, were de- 
scribed. Inthe third and fourth editions species new to science, or 
ewly Hien within our limits, were given in addenda, with such 
E erations in the stereotype plates as were possible. The present 
edition bege entirely rewritten) is printed from new stereotype 
plates, and in it are described 2,634 plants of the say en ggg and the 
higher Cryptogamous series; an increase in number of 208. In account- 
ing for so great an increase, we find that 308 out of Taa whole number 
are introduced species, being forty-e eight more than in the former edi- 
tion; thirty or forty have hitherto been considered as varieties (or as 
included in other species), or are new species, and the remainder have 
been newly discovered within the geographical limits of the work, 
and, as might be supposed, occur mostly on the borders of the area 
treated of. i 
most important changes which we notice are the combination 
of Nelumbiacee, Cabombacee, and Nympheacee proper as suborders 0 
m Rubiaceæ to its place een Gentianacew and Apocynacee. Cal- 
lu lyaris is regarded as a native plant. Our species of C 
are described for the “Manual,” by D ngelmann, of S 
ble rule of priority, for the familiar one of Benzoin; the genera Calli- 
triche and Euphorbia have been carefully reélaborated, as to our spe- 
cies, by Dr. Engelmann, for this Spree the Cupulifere and Betulacee 
have been thoroughly overhauled; the genus Lemna has been care- 
fully revised with the aid of notes Prot ieee by Mr.C. F. Austin, and 
the genus be (represented by W. Columbiana)t is now for the fi 
time indicated in a ook of Botany, as found in America, though 
discovered dels years ago by Dr. Robbins, who has now monographe 
anew our species of Potamogeton. Habenaria is now introduced as 
including all our species of Platanthera and Gymnadenia; Spiranthes 
S a Sa RO E 
_*The es which are à deseribed as new are Cab po ignei. Poly: 
- Cartisii, arsonii, j elia Canbyi 
3 Sae an amnis, raspy soma Austin, Lemna P i Torreyi, P hr T eerie fants, È» 
: ban ti is Lincastriensis Scirpus Smithi ainis os Sinithi, Aad Smithii, 
oie rasan as aseovered grey PEENE (European) species, W. 
