Isoetes.] SELAGINELLACEZ. 383 
From sea-level at Waterville, &c., to 2,300 feet on Brandon 
(£.W.S.), and to 2,338 feet on the Reeks (Hart). 
_ First record in 1806: Mackay Rar. 
The Quillwort appears to be the hardiest aquatic plant: 
in the Irish flora. It is found at 2,338 feet in Lough Cum- 
meenoughter on the Reeks and at 2,300 feet in the upper- 
most of the Coomaknock Lakes on Brandon, the two most 
elevated sheets of water in Kerry, or indeed in Ireland. 
The Isoefes was accompanied in the lower of these lakes by 
Myriophyllum alterniflorum, in the higher it was the only 
representative of aquatic vegetation. Although many text- 
books mention 2 to 6 inches as the growth of this plant, it is 
frequently found much exceeding this in Kerry. Some 
washed-up leaves found on the shore of Lough Slat in Glan- 
teenassig south of Castlegregory in 1908, measured 18 to 20 
inches in length, rivalling specimens of J. Moret from Upper 
Lough Bray, Co. Wicklow, in the writer’s Herbarium. 
I. echinospora Dur. 
Districts — TT. OL IV. — VI — — — 
Native. Lakes and sluggish streams on a peaty bottom. 
Rather common, locally, in the south. Peren. June— 
August. Calcifuge A. 
Il. In Lough Fadda between Sneem and Blackwater 
bridge, 1905 ; in the boggy portion of the river from Lough 
Currane, locality extending into—III. Frequent about 
Caragh and Glencar, as in the Caragh Lake and Lough Beg 
beside it, in the river between the Lake and Blackstones, in 
some of the pools in the Glencar River, &c., 1890-1911.— 
IV. Rather frequent in this District, as in the Glencar River, 
in several of the Oolagh Lakes and Lough Licka, in Lough 
Acoose, 1888-1911: &.W.S. In lakes near the Gap of 
Dunloe (Moore) Cyb. 1866. In Coosaun Lough and in boggy 
pools in the River Loe below Kate Kearney’s cottage, Gap 
of Dunloe, and in Glas Lough on the Purple Mountain, 
1904 : Rk. W.S.—VI. “ In the upper [Lower] lake of Killarney, 
near Glenagh Cottage (Moore) Cyb. 1866. In Ross Bay, 
Lower Lake, Killarney : Linton 1886. Still in both Moore’s 
and Linton’s stations, and in many other spots about the 
Killarney Lakes, as in Bog Bay, &c., on the Muckross shore, 
in the Back Channel at O’Sullivan’s Punch Bowl, in several 
localities on the north side of the Middle Lake, in the Long 
Range and Upper Lake, &c. ; in Ardagh pond to the south- 
east and in Kilbrean Lake to the north-east of Killarney, 
1887-1904: R.W.S. 
