The English flora - SeaweedAfrica

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210
Sm.— Ach. Syn. p.
LICHENES.
314. Lichen fiuviatilis,
[Collema.
Huds.—E. Bot.
t. 2039.—Dill. Muse. t. 19./. 28.
On calcareous rocks, in the stream near its source, at Malham Cove,
Yorkshire. Snowdon, DUlenius.
12. C. muUipartitum, Sm.* (many -branched Collema); thallus
radiating- fleshy, segments repeatedly forked fan-shaped crenate
convex above concave beneath, apothecia prominent at length
blackish and flat. E. Bot. t. 2582.
On walls and rocks, Killarney, Ireland, abundant, Sir T. Gage. Westmoreland,
Sir J. E. Smith.
13. C. margindle, (marginal Collema); thallus imbricated
olive-black, its lobes linear parallel zigzag channelled crisped
crenate branched smooth, apothecia marginal dark reddish-
brown with an entire border.
Lichen marginalis, Huds.—
E. Bot. t. 1924.— Collema melcenum, (3. Ach. Syn. p. 316.
Dill. Muse. t. 19./. 25.
On calcareous stones, in moist places, often among mosses.
14. C. fasciculdre, Ach. (clustered Collema); thallus sub-
orbicular the lobes dilated upwards plaited waved inciso-crenate,
apothecia marginal shortly
reddish. Sm.—Ach. Syn. p. 317.
stalked clustered turbinate
Lichen fascicularis, Linn.—
E. Bot. t. 1162.—Dill. Muse. t. 19./ 27.
On the mossy trunks of trees : frequent in Scotland.—The lobes of
the thallus are often obliterated by the exceedingly numerous apothecia.
15. C. ? corrugation, Ach. (corrugated Collema); gelatinous
thick black-green with elevated intestiniform convolutions.
Dicks.—Ach. Syn. p. 318. Lichen corrugatus, Dicks. Cr.
Ease. 4. p. 26.—Dill. Muse. t. 19./ 19.
On rocks near the sea, Sussex, JDillenius. On rocks and stones,
Dickson.— Nothing seems to be known of this by any living Botanist.
It is probably a marine production and far removed from any Lichen.
16. C. cretdceum, Ach. (Chalk Collema); thallus minute
lobed simple stellated dark-olive bearing a central solitary elevated
brownish flesh-coloured apothecium with a paler elevated
entire border. Sm Ach. Syn. p. 328 Lick, cretaceus, E. Bot.
t. 738.
^ Common
on chalk and on the white coating of flint-stones, Smith.—
This appears to be a young state of some other species, probably of C.
tcnuissimum.
*** Thallus somewhat foliaceous, thin, lobed principally in the
circumference.
17. C. palmdtum, (palmated Collema); thallus tufted nearly
erect greenish-brown its segments thin linear many-lobed somewhat
palmate revolute, apothecia scattered reddish. Sm.—
Lichen palmatus, Huds.—E. Bot. t. 1635. Collema palmatum,
(3. (not a.) Ach. Syn. p. 319.— C. comiculatum, Hoffm.—Dill.
Muse. t. 19,/ 30.
Upon the ground, among mosses. Sandy soil by the sea, near Yarmouth,
abundant, Mr. D. Tamer.
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