The English flora - SeaweedAfrica

212 LICHENES. [Collema*
furvwn, Ach. Syn. p. 323 Lichen furvus, Ach. in Nov. Act.
Holm. v. 22. p. 164. t. 10./. 2.—Dill. Muse. t. 19./. 24?
On the ground, Sussex, Kirkby Lonsdale, &c. Gravel walks, Oxford?
Dillenius.—" Distinguished from the following by its larger lobes, more
pulpy when wet and sprinkled on both surfaces with granules which do
not become leafy, and by the smaller almost stalked scutellcB with an
entire elevated border." Borr.
24. C. crispum, Borr. (curled Collema); lobes of the thallus
thinnish much divided their segments imbricated crowded
rounded concave with entire or denticulate raised edges, apothecia
sessile the border crenulate at length leafy. Borr. in
E. Bot. Suppl. t. 2716./. 1 Lichen crispus, Linn.—Dill. Muse.
t. 19./. 23.
Not uncommon on stones and walls, sometimes on the ground-
" This Lichen only is preserved in the Dillenian Herb., as the plant fig.
in the Hist. Muse. ,- it must therefore be regarded as the L. crispus of
Huds. and Linn., and ought to retain the name. It is possible that C.
crispum, a. Ach. Syn. p. 311, may belong to this species : but it is more
probable that it stood better, with all the vars., where he had placed it
in the Lich. Univ., under C. pulposum (L. pulposus, Bernh.), which is
the L. crispus, E. Bot. t. 834. The latter is excellently described by
Wulfen, (in Jacquin's Collect, v. 3. p. 139. t. 12. f. 1.) as the L. crista-
tus, Linn., a species adopted, as L- crisjms was, from Huds. and Dill.
In this instance, the Dillenian Herbarium fails us ; for under the No.
(t. 19./. 26) to which Hudson refers as his L. cristatus, are preserved
one specimen of the larger var. of C. pulposum, Ach. (usually regarded
as L. cristatus), others of the plant now before us, and one or two of
our C. ceranoides. The figs, and descr. in the Hist. Muse, do not decide
the question. We have not examined the specimens in the Herbaria
of Sherard and Buddie. At present, therefore, we would call the
species cristatum instead of pulposum ; since it cannot be doubted that
the larger var. at least, which grows on the ground and has more erect
and more laciniated lobes, was contemplated by Hudson and the places
of growth which he mentions, lead to the presumption that he included
the smaller and more common form also. From all the states of that
very variable Lichen, our C. crispum is readily and satisfactorily distinguished
by its thinner and more leaf-like lobes." Be>orr<
25. C. dermatinum, Ach. (shinny Collema); lobes of the thallus
between gelatinous and coriaceous rounded with ascending
sinuated edges, upper surface sprinkled with granules, apothe-
cia somewhat stalked, the border narrow entire slightly raised.
—Ach. Lich. Univ. p. 648, Syn. p. 322 Dill. Muse. t. 19.
f. 22.
On calcareous rocks ; in fruit, N. Wales, Mr. Griffith : barren, in
Leigh Wood near Bristol, Mr. Forster.—" Thallus about as thick as in
C. crispum, its lobes larger and less divided ; apothecia much like those
of C. granulatum, E. Bot. t. 1757 and C. flaccidum, t. 1653; but the
thallus is much less thin and membranous than in the latter, the lobes
less entire and the granules not so numerous nor so minute ; while the
lobes are less concave than in C. granulatum and the granules are confined
to the upper surface, and the tufted cottony radicles are wanting.
Judging from the specimen sent by Acharius to the Linn. Society, the
C. thysanceum of that author is but a var. of C. dermatinum." Borr.
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