308 NAIADACEA. [Potamogeton. 
While this latter variety is abundant in places, the most 
common Pondweed in the upper portion of the river is a 
nitens form bearing a superficial resemblance to the gramini- 
folius plant already mentioned. As Mr. Fryer has pointed 
out, however, they may be distinguished by the nitens form 
having amplexicaul leaves, while in the graminifolius plant 
they are only narrowed into the stem. 
P. Zizii Koch. P. angustifolius Presi. 
District — — — — — VW —- — — 
Native. Still water. Very rare and local. Peren. July— 
August. 
VI. In Doo Lough, a small lake in Muckross demesne : 
R.W.S. 1889. In West Meadow Bay on the Muckross shore, 
Lower Lake, Killarney, 1894: R.W.S. 
First record in 1889: R.W.S., Journ. of Bot. 
Probably not so rare as the above scanty records would 
indicate ; it appears, however, to be very local in the county. 
The P. Zizit form recorded from the River Laune in R.W.S. 
1889, &c., proves to be P. graminifolius Fries (quod vide). 
P. lucens Linn. 
District. ~) e  e  OS  SS 
Native. Still water. Very rare and local. Peren. June— 
July. 
VI. In Ross Bay and in a small pond or offshoot of the 
lake on the east side of Ross Island ; in a bay near the 
Muckross Hotel boat-house in some plenty, and in Glena 
Bay ; all these stations are in the Lower Lake, Killarney, 
1894-1907 : R.W.S. 
First record in 1901: R.W.S., Topog. Bot. 
This is another very local Pondweed in Kerry although 
it probably occurs in more stations than those given above. 
In the Muckross Bay locality specimens were gathered with 
the leaves ending in a mucro, sometimes several inches in 
length—the state known as P. acuminatus Schum. 
P. przelongus Wulf. 
Districts — Il — IV. ~— VE ~—~ ~~ _ 
Native. In lakes and in a river. Very rare and local. 
Peren. June—July. 
II. In the Blackwater River, Kerry (Dr. Taylor) fide C. C. 
Babington. Supp. Eng. Bot. 1841—but not seen there 
recently._IV. Rather sparingly at the south end of Lough 
Acoose, Glencar : R.W.S. 1891.—VI. In several stations in 
the Lower Lake, Killarney, as between Victoria and Ross 
