Lycopodium .] ferns. 69 
Syn. — Isoetes lacustris of all modern botanists. 
Fig. — E. /?.— 1084.— F7o. Lon. N. S. 131 .—Bolt. 41 .—Flo. Dan. 191.— 
Schk. fil. 173. 
Des. — Root tufted, composed of long, branched, smooth fibres. 
Leaves radical, tufted, filiform or subulate, 2 to 4 inches high, 
light green, and very brittle. Receptacles formed of the base of 
the leaves : the outer, which are also the larger and older leaves, 
bearing perfect seeds ; the inner and younger leaves produce finer 
granules, as explained in the Introduction. 
Mr. W. Wilson finds two varieties in Wales ; the one densely tufted, with 
slender, erect leaves, the other with broader and widely-spreading leaves. 
The former of these, Dr. Hooker thinks may he the Isoetes setacea of Bose. 
Sprengel says, “that the plant grows at the bottom of carp ponds, where it would 
not be of very easy access, did not the fish assist the botanist by disengaging 
it from the mud, when it is found floating at the edges of the pond.” 
Sit. — Found only in the extreme north of Wales, north of England, and in 
Scotland, which is a curious circumstance, because submersed water plants are 
not in general so strictly confined to particular latitudes or altitudes. 
Hab. — Sco. : Loch Callader, Aberdeenshire, and Loch Brandy, Forfarshire, 
Mr. W. Brand. Loch Whirral, Forfarshire, Dr. Graham. Loch Tay, Perth- 
shire, Dr. Greville. Most of the Scottish Lakes, Mr. H. C. Watson. — Ire. : 
Lakes in the Rosses, Donegal, Rev. Mr. Murphy. — Eng. and Wal. : Prestwick 
Carr, Northumberland, 11. G. Ulswater, Cumberland, Mr. Williams. Coniston 
lake, Miss Beever. In Llyn-y-cwm, Pfynnon Frich (Snowdon), Eake Ogwan, 
and Llanberris lakes ; also in Floutern Tarn, between Scale Face and Whitehaven, 
Mr. W. Wilson. Lakes of Denbighshire, Mr. J. E. Bowman. 
Geo. — More copious in Sweden and Denmark than elsewhere. New York 
aud northwards in America. 
LYCOPODIUM, Linn. CLUB-MOSS. 
(From \vno;, a wolf, and non;, roh;, a foot; the ends of the stems appearing 
like the hairy feet of some animals.) 
A, spike of fruit of Lycopodium selaginoides, natural size. B, two leaves or 
bracts of ditto ; one showing the larger grains, the other the receptacle for the 
smaller. C, receptacle opening and scattering the granules. D, cuticle of a 
leaf. E, section of the stem. F, spore. G, abortive granule. 
A very extensive genus of no less than 140 species, found in all parts of the 
world, some in the hotter, and others in the colder countries. Six only are 
natives of Britain, and these are far inferior in beauty oj appearance to many 
of foreign growth. The Lycopodiums were always taken for and called Mosses 
