BIBLIOGRAPHICAL NOTES. ; 297 
P, O-wathensis and P. marianensis, the former was founded on 
li 
the figure of that of the var. stagnatilis Koch of Reichenbach’s 
Icones, but. with two teeth at the base of the side of the fruit, and 
another at the base of the keel. Kunth, Enum. iii. 128 (1841), 
places all these species of ra under P. natans L.; but the 
form of the “ag refers them to the fluitans group. 
may asked peat the great peek made in the 
study of the Siem seg of plants of late ay “<j there 
not other characters that may be used beyond the old o e 
answer to this is, gti are indications of such; but, as in nak new 
things, oe wide Se, hn con ntinuoUs. use are needed 
befor wtp n be advanced a e than theo 
je rot the fruit of Kosh’s: S var. eignatilar in n Reichenbach’ 
Teones’ ‘Ths to me always been a puzzle; authentic examples 
Koch’s plant show no such Oe aaa beak : fataos they were 
drawn from immature exam 
I propose the following reitnrees as the best that can at 
present be adopted for this section :— 
. P. rxurrans Roth et auct. plur. The barren plant generally 
sonamed. Europe generally. Beyond Europe I have no certain 
Be that sie be least placed here. 
-. 1canus Chamisso, Linnea, ii. 226 (1827). P. 
Richard foune in herb. Buchenan! PP. Lonchites Tuckerman, 
n. Journ. Sc. & Art, 2nd Ser., vol i. 226 (1848).—Var. stagnatilis 
Koch (under fiuitans) Europe ! — Var. Noveboracensis Moron 
(under Lonchites). . Am i prensa y in Europe. Italy! 
Germany, Ober. a ee Heidelberg! Bruckhulm! Aargan! Si- 
lesia ! a a land (Jura), Michalet! Asia. Armenia, Radde! 
India. Punjaub! Africa. Algeria! Egypt! Socotra? America, N. 
Distributed en Canada! Brit. Columbia; southwards to Florida ! 
New Mexico! and Porto Rico! From the Eastern States, west- 
ward to Kentucky! Texas! California! 
Perhaps a better plan would be to give the Necker plant a new 
name, and place Lonchites Tuck. as a variety of it, or to consider 
oe a subspecies; but I am unwilling to give new names 
and sufficient reason can be found for so doing. W. 
shall Sicuibtlenis th in time obtain material to help in elucidating the 
obscure points in the hikeoey of P. fluitans Roth. 
(To be continued.) 
BIBLIOGRAPHICAL NOTES. 
TI.—' Borany or Bexonry’s Voyacr’ anp ‘Fiona or Nort 
AMERICA.’ 
In consequence of the printing of the dates of publication of the 
= of Hooker’s Flora Boreali-Americana* a short time ago, I 
* In Bull. Herb. Boiss. i. (1893), p. 298. 
