4 
353 
ON NAJAS MARINA L. AS A BRITISH PLANT. 
By Artruur Benvert, F.L.S. 
(Puate 241.) 
Txosr who have followed the progress of British Botany during 
the last two or three years cannot fail to have been struck with the 
special attention which has been given to water-plants, and to the 
interesting results which have rewarded the investigations of the | 
Messrs. Groves into the British Characee, as well as those to which 
I have been able to bring into notice in the Naiadacee. That this 
source of interest is not yet Cechanaited's is evident from the note at 
p- 849 of this Journal, rosgeing the discovery of another Chara 
and Naias new to.Britain. Only a short time before, I had the 
pleasure of recording (p. — ~ Bros sy in England of the 
subject of the present paper. It occurred in one place at Hickling 
Broad, East Norfolk; in pid ifinstity, and elsewhere rarely, for 
about the length of a mile. With it were growing riser 
pectinatus, Chara stelligera, C. polyacantha, C. hispida, far 
the greater portion of the bottom of Hickling Broad is sawdeel by a 
dense growth of Chara aspera, and I think it must be this plant— 
which grows literally by the acre !—to which Mr. T. eres refers 
Lubbock’s ‘Fauna of Norfolk,’ ed. 2, Lubbock 
speaks of t r at cklin . lone and 
abounding with a particular weed, Pochard Grass as it is called,”’ 
on which the Pochard Duck is accustomed to ; outh- 
well adds, “I cannot discover to what plant this name was a 
probably it was given to some genes of Potamogeton.” The Najas 
since has been collected by . Groves, and Messrs. B. King 
and Druce. The Slowing iiaraeaty of the species may be 
useful :-— 
Nagas eae L. Sp., ed. i., p. 1015; ed. ii., p. 1441 (excluding 
varieties); Nyman, Consp. Flor. Europ., p. 685; Hartman, Handb. 
Skand. FI. (1879), 408 ; TTI Fl. Brandenb. (1864), p. 669. 
j Fl. Pedem ; 
. 510. 
N. intermedia Wolfg., in Hich. Nat. Skizz., . “ah 
N. muricata Thuill.! ee Delile), Fl. Par., p. 509. 
Figures iio Danica, t. 2121; Vet erent Hand., 1837 (38), 
t. 8, p. 241; Linnea, ix. (1834), t. 1(2), x. [ogee 1 (fd). 
Structure, &e.:—Jahrb. fir Wissensch. or t. 7, 
fig. 11-18; Magnus, Beitr. Kenntn. atin, Berlin. “(187 0). 
Journal or Borany.—Vou. 21. [Decemper, 18838.] 2a. 
