384 SELAGINELLACEM. [Isoetes. 
From sea-level at Waterville, to 1,550 feet in Glas Lough 
on the Purple Mountain (#.W.S.). 
First record in Cyb. 1866: Moore. 
This plant has most probably a wider range in the south 
of the county than the above records would show. When 
growing, it may be distinguished from I. lacustris by its 
paler green and spreading leaves which taper much more 
gradually to their long subulate points than do those of the 
preceding species ; the plant is also more partial, if not quite 
confined, to soft peaty bottoms. Elsewhere in Ireland it has 
so far been recorded only from near Kilrush in Co. Clare, 
Inish Bofin off the Galway coast, and Newport in west Mayo. 
In Great Britain it has been found in north Wales and in 
two or three localities in Scotland. Like the preceding 
plant it has a northern distribution in Europe and America. 
[SELAGINELLA SELAGINOIDES Gray—‘“ Sandy ravines near 
the sea; counties Donegal, Londonderry, Dublin, Kerry, 
Wicklow, &c.” (Messrs. Mackay & Moore) Phytol. 1841, p. 65. 
This inconspicuous plant has not been noticed recently in 
Kerry and it seems better to await some more definite 
record than the above before admitting it to the county flora. 
It is known in one locality in west Cork and will most 
probably be re-found in Kerry, but it is a very rare plant 
generally in the south-west of Ireland.] 
MARSILEACES. 
PILULARIA Linn. 
P. globulifera Linn. Pillwort. 
Districts — TI — IV. — VI. ~ — — 
Native. Muddy margins of still and sluggish water, usually 
submerged. Very rare, but locally abundant. Peren. 
June—August. Calcifuge A. 
II. Sparingly at the south-west end of the Upper Killarney 
Lake: R.W.S. 1890.—IV. About the mouth of the River 
Gearhameen, Upper Lake, and—VI. Abundant at intervals 
along nearly the whole length of the Long Range, Killarney : 
R.W.S. 1902, and in some abundance on ground usually 
submerged about the mouth of the River Flesk, Lower Lake, 
Killarney, 1909-12: R.W.S. 
First record in 1890: R.W.S8. Journ. of Bot. 
Although this diminutive plant usually grows quite sub- 
