The English flora - SeaweedAfrica

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Parmelia.] L1CHENES. 203
Summits of the Highland mountains, growing on rocks. On Ben-
Nevis, plentiful.
24. P. encdusta, Ach. (encaustic Parmelia); thallus stellated
brownish-grey dotted with black the segments deeply and much
divided linear tumid here and there constricted convex on both
sides, black uneven and naked beneath, apothecia red-brown
with a somewhat crenulated border. Ach. Syn. p. 206.
Lichen encaustns, Sm. in Linn. Trans, v. 1. p. 83. t. 4. f. 6.
E. Bot. t. 2049.
Plentiful on rocks, on the summit of Ben-Nevis, where it was first
detected by Dr. Stuart.
25. P. dquila, Ach. (sun-burnt Parmelia); thallus orbicular
tawny-brown very much divided into numerous imbricated
crowded branched narrow linear segments with their margins
inflexed, black and shaggy beneath, apothecia dark-brown with
an incurved and cremated border Ach. Syn. p. 205. Lichen
aquilus, Ach. Prodr.—E. Bot. t. 982. L. fuscus, Huds—
])ichs.—L. puttus, Light/.—L. obscurus, With.—Bill. Muse.
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t. 24. /. 69.
On rocks, in various parts of Britain; yet not very general: most
abundant on the borders of Devon and Cornwall.—Closely applied to
the rock on which it grows, and remarkable for its tawny-brown hue and
the very numerous and much divided narrow segments of the thallus.
26. P. aleuritcs, Ach. (mealy spreading Parmelia); thallus
orbicular continuous rugged greyish-white mealy lobed in the
circumference sinuated crisped and notched, beneath of the
same colour with blackish fibres, apothecia elevated plane red-
(li>h-brown with an inflexed crenulated and pulverulent border.
—Ach. Syn. p. 208. Lichen aleurites, Ach. Prodr.—E. Bot.
t. 858.—L. diffusus, Bichs. Cr. Ease. 3. ;;. 17. t. 9./ 6.
Trunks of trees, posts, rail.-,, &C. On the bark of firs in the north,
frequent.
27. P. (inihtgiia, Aeh. (yellowish pouxb ry Parmelia); thallus
stellated pale yellow-green smooth bearing powdery warts the
segments Linear appressed plane dichotomous somewhat trunca-
ted, beneath brownish-black and fibrillose, apothecia near the
centre email nearly plane brown their border entire Ach. Syn.
/>. 208. Hook. 11. Sot. /'. 11. j>. 55. Psora ambiaita, ffoffin.
PL Lich.f. -2—1, andt 42./ 2,
Trunk/ of Fir-trees in tin- Highlands, especially in the northern
I Kinnordy, Forfarshire:—always barren.
2 .
I*. rinudaOi Ach. (sinuous imbricated Parmelia); thallni
ii> segments
orbicular imbricated smooth of a sulphureous-grey
pinnatifhl with dilated cloren lobes and ciircular sinuses, beneath
black with dense fibres, apothecia brown with a thin smooth
entire border. Sw.—.lr.',. Syn, />. i't»7.— /. 1
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