58 
CRYPTOGAMIA. ALGA Lichen. 
L. amphib^ius. Leaves covered with numerous minute dots; bright 
green, changing to dusky olive ; coiled up like hollow cylinders. 
FI Dan . 532. 2— (E. Bot. 593. 2. E.)— Mich. 54. ord. 36.1. 
This plant in its first state consists of a number of fine tender membra¬ 
naceous pellucid green leaves, waved with margins which are elevated 
and bluntly indented. These leaves soon acquire a firmer texture, become 
opake, the upper surface changes to a bright green, and the under to a 
buff-colour; lastly they turn to a dusk olive ; the elevated margins are 
bent back, and the leaves are coiled like hollow cylinders, and covered 
with numerous minute dots, which are the only fructification hitherto 
observed. When moist it has a peculiar smell, not very unlike that of 
fresh peeled oak bark. Mr. Griffith. (This seems to connect the pre¬ 
ceding and following species. Smith, and Hook. E.) 
(Amphibious Cylindriform Lichen. L . miniatus. var. (3. Lightf. Huds. 
and With. Ed. ii. Endocarpon complicatum. Achar. Hook. E.) On rocks 
at Ham, Derbyshire, mixed with L. miniatus. Woodw. On stones near 
the lake called Llyn Idwell, Carnarvonshire, and on many of the stones 
under the water in the lake. Mr. Griffith. 
L. AQUATbcus. Tubercles brown, small, globular, immersed in the 
substance of the leaf; foliage brownish green, lobes blunt, tiled, 
puckered and corrugated; underneath reddish brown, deeply 
pitted and strongly veined. 
( E. Bot. 594. E.)— Hoffm. Lich. 45— Dill. 30.128 — Weber. 4. 
Dull dark green above, and smooth. Ash-coloured, clouded, wrinkled ancl 
pitted when dry. Sprinkled with brown wart-like dots, in clusters. 
Saucers rarely found, few, circular, sitting, reddish brown, border thick, 
the colour of the leaf. Hoffm. The saucers mentioned and figured by 
Hoffman, seem to be only the tubercles in their most expanded state of 
growth. 
(Dark Green Aquatic Lichen. L. Jluviatilis. With. Ed. iii. Platisma 
aquaticum. Hoffm. Lich. ii. p. 69. L. aquaticus. Weis. Crypt, p. 77. 
L. Jluviatilis. Huds. and Weber. Spicileg. p. 265. Endocarpon Weberi. 
Achar. Hook. E.) The figure of Dill, has been cited as var. L. 
miniatus. On stones in rivulets. Near Perfeddgoed House, Bangor; 
and at Funnon Comb y Goff, Radnorshire. Dill. Muse. p. 225. Found by 
Mr. Griffith on stones, often under water in Llyn Idwell, Carnarvon¬ 
shire, who favoured me with specimens, observing that though by most 
authors made a var. of L. miniatus, he thinks it perfectly distinct. (On 
stones in a bourn on the north side of the Derwent, opposite Gibside, 
Durham; also on a rock in a rivulet in Holwick, Yorkshire. Mr. 
Winch. On stones under water in the river Isla, Angus-shire. Mr. 
Brown. Aug. E.) 
K. Foliage leather-like. 
L. fucoFdes. Tubercles white, mealy, lateral: plant whitish, hoarv, 
porous, much branched; branches in bundles, cylindrical; sub¬ 
divisions, awl-shaped, bluntish, short, nearly of the same 
height. 
Dill. 22. 60. 
Has much affinity with L. fuciformis in its tough leather-like texture, but 
it is distinguishable by many marks. Dillenius’s figure was taken from 
imperfect specimens. Dicks. Narrow at the base, branching, branches 
