BRITISH JUNGERMANNRE 
( J setiformis. J 
JUNGERMANNIA SETIFORMIS. 
(TAB. XX.) 
Jungermannia, caule erecto, subsimplicc : foliis bifariis, arctb imbricatis, erectis, quadrat is 
quadrifidisque j angulis inferioribus margine hie illic spinuloso-dentatis : fructu terminali 
lateralique ; calycibus oblongis, plicatis ; ore aperto. 
Jungermannia setiformis. Ehrh. Beitr. Band. in. p. 40. Schrad. Syst. Samml. Lief. n. 
p. 4. Hoffmann, Germ. n. p. 82. Roth, Germ. in. p. 364. Linn. Syst. Nat. ed. 
Gmel. n. p. 1352. Lamarck, FI. Fr. n. p. 437. 
Jungermannia concatenata. Linn. Lapp. ed. Smith, p. 343. 
(3. alpina ; foliis minoribus ; segmentis integerrimis. 
Hab. a. has not hitherto been found in Britain. — /3 grows in great abundance upon the 
the summit of Cairn-gorum ; and I have also received it from Mr. Dickson and 
Mr. George Donn of Forfar, both of whom gathered it upon the Scotch Alps. 
Plant growing in densely matted tufts, of some inches in diameter. 
Root scarcely any, except that a few fibres may now and then be seen to proceed from 
the lower part of the plant. 
Stems from two to three inches in length, filiform, slender, undulated, of a red or reddish- 
brown color, and firm texture, erect, simple, or once or twice irregularly dichotomous. 
The Leaves (f. f. 4. 7. 8) are bifarious, erect, appressed, and so closely imbricated as to 
conceal the stem on every side. They are about a quarter of a line in length, of a 
quadrate figure, but rather broader than long, semiamplexicaul, divided from the 
extremity to within one-fifth of the base in a (in /3 to within one-third of that 
distance) into four equal, lanceolate, erect segments, which are keeled on their inner 
surface, and furrowed on the outer ; their margins are recurved, those of a. here and 
there beset with unequal, but strong teeth, generally pointing downwards, while in (3 , 
these margins are quite entire, though, in the lower angles of the leaves, in both the 
varieties, there are, immediately adjoining the base, two deflected teeth, the lowest of 
