The English flora - SeaweedAfrica

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Endocarpon.] L I C H E N ES. 1 5 7
ileum, Ach. Licit. Univ. p. 290. Lichen lachneus, Ach. Prodr.
p. 140. E. Bot. t. 1698. y. squamulosum ; lobes of the thallus
aggregate sub-imbricated lobato-crenate pale fibrillose and
woolly beneath. Ach. Syn. p. 99. Lichen leptophyllus, E. Bot.
t. 2012, (excluding the synonyms).
a. On barren heaths, near Croydon, Mr. Dickson ; and in Norfolk,
Mr. D. Turner. (3. Common on the Sussex downs, and on rocks at
Cheddar and Bristol Hot-wells, Mr. Borrer. y. Hill of Kinnoul, near
Perth, and other places in Scotland.—This varies much in colour and
a good deal in form, and constitutes, with the following five species, a
little groupe, which might, as it appears to me, be considered as states
of one and the same species, without much violence to nature.
3. E. pallidum, Ach. (pale-leaved Endocarpoii); thallus foliaceous
somewhat imbricated lobed crenate pale greenish-grey
slightly spongy and black beneath the outermost lobes pale and
naked on the underside, apothecia immersed black. Sm.—
Ach. Syn. p. 100.—Lichen pallidas, E. Bot. t. 2541.
On rocks thinly covered with earth, Ireland, Sir Thomas Gage.—
This Mr. Schaerar unites with E. Hedwiuii.
4. E. psoromoides, (bark Endocarpoii); scales between
tartareous and leafy small crowded somewhat imbricated appressed
lobed waved tumid olive-green with slightly elevated
crenate whitish downy edges underside black and spongy, apothecia
immersed nearly globular pale except the slightly prominent
blackish-brown apex.— Verrucaria psoromoides, Borr. in
E. Bot. Suppl. t. 2612./. 1.
Probably rare. On Elm bark at Hurst-pierpoint, and on Ash at Beeding,
Sussex.— With the exception of E. pulchelliim, no other Endocarpon
has been observed to grow on trees. It differs, Mr. Borrer tells us,
from its nearest affinity, E. pallidum, in its less truly imbricated and more appressed
mode of growth, the edges only of the scales being slightly raised ;
in the really fibrous texture of the underside; and, in some degree, in the
figure of the scales and incisions of the edges; and not less in the
tubercles. " These, in the present species, have in the immersed part a
thin peritheeiuin, of no darker colour than the nucleus; such, we presume,
as Acharius held essentially characteristic of a genuine Endocorpon
; whilst those of E. pallidum have, in every part, a thick black shell.
In this respect E. sorediahim agrees with E. pallidum; and it fur-
ther differs from E. psoromoidet by the peculiar apex of its tubercles, by
the larger scales of its tlutlhts and their much more downy or rather
spongy edges."
5. K. leptophyllum, Ach. (tmail4eaved Endocarpon); thalluscar-
tilaginous foliaceOOfl orbicular peltate blacki-h-brow n or inclining
to grey, the circumference spreading flexuose, beneath smooth
and naked wTinkled Bubplicate and black, points ofthe apothecia
black somewhat prominent. Ach, Syiup, 102, Lichen lepio*
phyllut* B, Bot* t. •_'. 20 I 2.
f, only* (according to Mr* Borrer)*
Rocks by the shore of Loch Lomond, Mr, Borrer* Rocks by
enthwaite water, Cumberland, .1/'. Robertson*