The English flora - SeaweedAfrica

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Parmdia.] LICHENES. 201
lar olive-brown rugged in the centre and often granulated the
margin lobed and crenated appressed brownish and fibrous beneath,
apothecia brown concave with an inflexed crenated border.—^.
Syn. p. 200. Lichen olivaceus, Linn—E. Bot.
t. 2180 Dill. Muse. t. 24./. 77, 78.
On the bark of trees, park-pales, &c. frequent.
14. P. corrugdta, Ach. (wrinkle-shielded Parmelia); thallus
orbicular membranaceous somewhat rugged of a dark glaucousgreen
lobed cut and rounded Rubricated waved blackish and
fibrous beneath, apothecia large concave red-brown externally
wrinkled with a crenate inflexed border.—Ach. Syn. p. 199.
—Lichen corrugatus, Sm. in Linn. Trans, v. I. p. 83. h. Bot.
t. 1652.—Dill. Muse. t. 24./. 79.
Saham wood, Norfolk, Sir J. E. Smith. Trunks of old Thorns, Ickworth
Park, near Bury, Suffolk; Rev. G. R. Leathes.-Thetege, rugged,
concave apothecia and larger wavy thallus distinguish this species
from P. olivacea, with which it has sometimes, but most incorrectly, been
confounded.
15. P. pulveruUnta, Ach. (green powder// Parmelia); thallus
orbicular stellated deep glaucous-green hoary ash-coloured.when
dry cut into numerous oblong multifid flat and obtuse wrinkled
segments black and downy beneath, apothecia glaucous-black
with a thick inflexed at length leafy border.—Ash. Syn.p.2\4.
—Lichen pulveruUmtus, Sehnb.—E. Bot. t. 2063.—Dill. Muse
/. 24./. 71.
Very common on the trunks of trees.
16. P. pittfrea, Ach. (scurfy imbricated Parmelia); thallus
orbicular imbricated glaucous-green hoary ash-coloured when
dry its segments dilated concave rounded crenate very powdery
at "their lateral margins pale and hl.mus beneath, apothecia
glaucous-black with a broad inflexed very powdery border.
Sm.—Ach. Syn. p. 201.—Lichen pitgnus. Ach. Prmlr.—L. Bot.
,. 2064.—L. pulverulentus, Ehrh.— L. kmuginomts, Boffin.
Enum. , ,,.
Trees and walls, in Norfolk and Suffolk, common About Glasgow,
Dr. Scouier.
17 |» s!, linns. Ach. ( hlurh-shifhlrd stillatcd Panmlia); thal-
us orbicular stellated pale unchangeable grey the segments
linear rather convex multifid beneath whitish with dark fibres,
apothecia greyish-black with an entire elevated at length indexed
border.—-Ach. Syn. p. 216.—Lichen stettaris, l.nm.— l.. Bot
t. 1697. -/>///. Muse. t. 24./ 70.
I'm quent on the bark of ti
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Is. i
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'. Ach. (elegant garland Parmelia); thaJlui Bt< U
laled imbricated somewhat cartilaginous greenish-white col into
numerous linear multifid segments powderj si the extremities
and obtuse beneath snow-white with grej fibres, spotnecia