( J. incisa. ) 
BRITISH JUNGERMANNGE. 
JUNGERMANNIA INCISA. 
(TAB. X. ) 
Jungermannia, caule prostrato, depresso, simpliciusculo ; foliis subquadratis, undulatis, sub- 
trifidis, segmentis insequalibus, hie illic denticulatis : fi-uctu terminali ; calycibus obovatis ; 
ore contracto, lacerato. 
Jungermannia incisa. Schrader, Samml. n. p. 5. Roth, Germ. hi. p. 381. 
Jungermannia foliis laceris, multidentatis, sessilibus. Hall. Helv. iii. p. 59. n. 1862. 
Hab. Holt Lows and Edgefield Heath. Rev. R. B. Francis. — Herringfleet, near Yarmouth. 
Mr. D. Turner. — Rocky places upon Ingleborough, Yorkshire. — Near Bantry, Ireland. 
Miss Hutchins. — Lambeg Bog, Ireland. Mr. Templeton. — Found in fructification near 
Croydon, Surrey, in July, 1811, by Mr. Dickson.— Bogs, Westleton, Suffolk.— (It delights 
chiefly in moist places, and is often found among Sphagna and other mosses.) 
Plant forming small, but very dense patches of a pale green color ; the surface appeal ing 
exceedingly beautiful from the numerous crisped and dentated leaves, resembling in miniature 
a tuft of lettuces. It firmly attaches itself to the ground or moss upon which it grows by 
means of its abundant fibrous radicles, which proceed from the whole length of the under 
side of the stem, and are much entangled and matted together. 
The stems, which are prostrate, about a quarter of an inch long, and cylindrical at 
the base, gradually become wider towards the extremity, where they are depressed, 
and equal the sixth of a line in diameter ; in general they are quite simple, 
though sometimes furnished with a small ramulus : their color is a veiy pale and 
pleasant green. 
Leaves (f. f. 3. 5. II) at the base of the stem rather distantly placed, the rest more 
approximated, at the extremity of the barren plants frequently forming thick tufts 
or heads ; they are subquadrate, longitudinally undulated, at the base semi-amplexicaul 
and decurrent, the anterior margin a little involute, the apex tri or quadridentate ; 
but here and there a lower leaf (f. 6) is seen to be only emarginate: the segments are 
of unequal sizes, crisped and distorted ; their margins very frequently dentate with 
one or two small teeth. The color of the leaf is an extremely pale green, approaching 
that of J. tomentella. The reticulation (f. 14) is pellucid, the cellules opaque, roundish. 
