184 THE NAIADACER OF NORTH AMERICA. 
clearly no connection. The continental distribution (chiefly southern 
and south-eastern) is, however hat unf. ble to the theory 
of its indigenousness.—Epwarp 8. MarsHatu. 
Evrnors1a Esura 1x Bucxs.—Through the kindness of Mr. 
Stanton and Mr. Tufnail, I was informed last year that a Huphorbia 
’ 
cultivated in gardens. The figure in F. Bot. is fairly good, but 
badly coloured, and the cusps of the glands drawn so as to represent 
them below the gland. In the reproduced plate in Syme’s FL. Bot. 
they have almost disappeared, and the gland is represented as 
obovate, thus giving a wrong impression.—G. C, Drucr. 
NOTICES OF BOOKS. 
The Naiadacea of North America. By Tuomas Morone. (Memoirs 
of the Torrey Botanical Club.)” Issued March 15th, 1898. 
Price 2 dollars, 
confined to North America, a claim which cannot be supported with 
cases the separating characters would not hold good 
€ may note some of these omissions. ‘P. natans Li. occurs in 
Central America (Hemsley). No mention is made of P. plantayineus 
Du Croz var. Jamaicensis Grisebach (#1. W. Indies), which occurs 
also in St. Domingo! and Hog Island! (Bahamas). P. occidentalis 
Sieber (= P, Jfluitans Griseb.) is omitted ; it occurs in Porto Rico! 
St. Domingo | Jamaica | Martinique! and Cuba! PP. Claytonit 
Tuck. occurs also in Jamaica! and Porto Rico (Sintenis!); the 
