310 NAIADACEA. [Potamogeton. 
P. densus Linn. 
Districts — — — — — VI. VI — — 
Native. In still and slow-running water. Very rare and 
local. Peren. June—July. 
VI. Killarney (Babington) Cyb. 1866—not seen about 
Killarney recently —VII. Abundant in a small stream and 
adjoining ditch near Blennerville, Tralee, 1892 (R.W.S.) 
Cyb. 1898, and in 1905. 
First record in Cyb. 1866 : Babington. 
This is probably the rarest Pondweed in Kerry. As at 
present known, it occurs over an area only a few square 
yards in extent, but is not unlikely to be found in the north 
of the county. Although often sought for, this plant has 
not yet been refound in Prof. Babington’s somewhat vague 
locality. 
P. obtusifolius Mert. & Koch. P. gramineus Smith. 
Districts — — — — — VI. VIL — — 
Native. In ponds. Very rare and local. Peren. June— 
July. 
VI. In a small pond, joined to the lake in high water, a 
little to the east of Ross Island, Lower Lake, Killarmey, 
1892 (R.W.S.) Cyb. 1898—VII. In Parkmore pond about 
three miles east of Farranfore: R.W.S. 1902. 
First record in Cyb. 1898: R.W.S. 
P. pusillus Linn. 
Districts I. II. III. IV. V. VI. VII. VIII. 1X. 
Native. Lakes and pools, streams and ditches. Rather 
common. Peren. June—July. 
From sea-level, to 1,590 feet in Lough Googh on the south 
side of the Reeks (Hart), an unusual height. 
First record in 1882 : Hart, Proc. R.I.A. 
P. pectinatus Linn. 
Districts — — ITI. — V. — VII. VII. IX. 
Native. Ditches, lakes and streams, usually near the sea. 
Rare in the south, rather common in the north. Peren. 
June—July. 
Rare in the following Districts—III. In two or three 
localities along the north side of Ballinskelligs Bay, 1892 : 
R.W.S.—V. Along the north shore of the Castlegregory Lake 
and in the stream from it : Hart 1884. In several localities 
about Castlegregory, 1902, and near Inch on Castlemaine 
Harbour, 1894.—VII. About Blennerville west of Tralee, 
1899: RWS. 
