mouth, Dolgelly, aiul near ITarlech, Merionethshire; Ishuulof Anolesea ;
Oswestry, Shropshire; near Kendal, M’estmorelnnd. New Gallowav, Kirh-
eiidbnghtsliire ; liareahline, Argvleshire; Loch Linnhe, Inverness-shire.
Uistlebernard Parlr, Dandon, co. Cork ; Killarney, co. Kerrv ; Letterfrack,
C onnemara, co. Galwav.
A’ar. p . rugosa Cromb. Grevillea, xv. (1887) p. 75.—Thallua
somewhat expanded, the lobes broadly lin e a r a t the circumference,
more or less rugose. A])otheoia witli the thalline margin a t length
rugose; sporos 0 ,0 1 3 -1 5 mm. loug, about 0,008 mm. th io k .—li« --
m d ia tiliacea var. rugosa Leight. Lich. PL p. 133. P In 'iq a ta var
r y o s a Leight. Lioh. Fl. ed. 3, p. 128. Parmelia rnqosa 'ïa v L in
Alack. Fl. Hib. ii. (]83(!) p. 145.
A well-marked variety, agreeing with the tvpe in the reaction of the
mediilla, but diflenng in the rugose thallus and margin of tlie apothecia,
and 111 the broader (less revolute) lobes, which are rarely aud sparingly
sorediiferoiis at the apices. The .apothecia are very rare.
/ / * (hi rocks in maritime distiiets.— Local in S.AA’. England,
JN. \V ales, the AA . Highlands, Scotland, and S.AA’. Ireland.—D. M. ; Corn-
worthv, Devonshire ; The Lizard, Cornwall; liarmoiith (fruit), Dohrollv,
and Aberdovev,Merionethshire; Llanberis, Carnarvonshire. 13arc-ardine,
Aro'jleshii'e. Dunherron (fruit), co. Kerry.
Form panniformis Cromb. Grevillea, sv . (1887) p. 75.—Thallus
more or less rugose ; laciniæ short, narrowly dissected and congested
Apothecia not seen.
Forms a somewhat densely imbricate crust, from the short laciniæ
being much divided and aggregate. I t occurs only sterile.
Hah. (Ll the trunks of old trees, uear the base, in maritime and upland
tracts.--DMir. Loca and scarce, in S.AV. England and the AV. Highlands,
sH r l“ ■ Cornwall. By Loch Linnhe, Inverness-
A’ar. y. concentrica Cromb. GreviUea, xv. (1887) p. 75.—Thallus
qianniform, free, spherical, growing in involved concentric layers.
Apothecia not seen.— Harm«?!« tiliacea var. concentrica Leight. Lich.
R . p. 133, ed .3 , p. 122. Parmelia lævigata var. concentrica Cromb.
Lioh. B n t. p. 33. Parmelia sinuosa y. concentrica Aludd, Alan,
p. 96. Parmelia sa.vatilis var. concentrica Leight. in Garden. Chron!
18o6, pp. 84, 172. Parmelia .sinuosa var. erraPica Linds Mem
Sperm, p. 2 l S .~ B r i t . Exs. ; Leight. n. 2-32.
This curious rariety occurs on the ground in a free condition as small
globular balls. There is no reason to suppose th at it is free ah initio, but
that, alter being detached, it assumes this form from accidental circumstances
(c/i;. Cromh. Journ. Bot 1872, p. .107). Thougli it has been re-
teiied to different species, the thalline reactions, in conjunction with the
general aspect of the plant, show th at it belongs to P. 'reeoluta, produced
no doubt by a panniform condition of this species.
Hah. On the ground in maritime and upland tracts.—Histr Extremelv
W ,X L 9 s h l - e : Alelbury Ilill, near Shaftes-
8. P. tiliacea Aoh. Aleth. (1803) p. 215.—Thallus orbicular,
membranaceous, aiipressed, smoothish or partly rngulose, laciniato-
lobed, pale greyish-glaucous, subpruinose; beneath brownish black
and black-fibrillose ; lobes short, subimhricate, rounded and sinuato-
crenate a t tho margins (X+teilowish^ CaCl_|_j,j.,,i). Apothecia moderato,
crowded, concave or nearly plane, badio-reddish, tho margin
subeiitirc ; spores 0 ,0 0 7 -] 1 mm. long, 0 ,0 0 5 -7 mm. tliick.—Gray,
Nat. Arr. i. p. 438 ; Sm. Eng. Fl. v, p. 204 pro pa rte ; Aludd, Alan,
p. 93, t. ii. f. 28 ; Cromb. Lich. Brit. p. 33 pro parte ; Leight. Lioh.
Fl. p. 131 pro parte, ed. 3, p. 121 jiro p a rte.— Lichen tiliaeeus Eofím.
rte , t. xvi. f. 2 ; Dicks. Crypt, faso. iii.
Enum. (1784) p. 26 pro parte
p. 1 6 ; AA’ith . iArr. cd. 3, iv. p,
31.—B r it. Exs.-. Larb. Lioh. Hb.
n. 292.
AA’ell distinguished from both the preceding species by liaving the
thallus more closely appressed and someAvhat pruinose, with tlie laciniæ
more contiguous, narrOAvIy sinuate aud crenate at the margins. As mentioned
by Acharius I. c., the lobes tOAvards the centre of the thallus are
more rugose (A-ar. i-ugosnla Leiglit. Lich. Fl. p. 131, ed, S, p. 121), especially
seen in old plants, 'fhe apothecia are chiefly central, and the spermogones
are not unoonmioii. Thej’ are rather prominent, brownish-black, with
spermatia 0,007 mm. long, 0,001 mm. thick.
Hab. Ou the trunks of trees, rarely on rocks, in maritime and upland
districts.—Histr. Local and scarce in the Channel Islands, S. and N.
England, N. AA’ales ; uot yet seen in Scotland, nor Avith certainty in Ireland.—
B. AI. ; Petit Port', Island of Jersey. Esher, Surrey; Glynde,
Sussex ; near Hyde, Isle of AVight ; Lymington, Hampshire ; near Exeter
and llsham, Torquay, Devonshire ; near Barmouth and Harlech, Alerionethshire
; Clapdale,'Yorkshire; near Kendal, AA’estmoreland.
Subsp. P. carporMzans Cromb. Grevillea, xv. (1887) p. 75.—
Thallus similar to th a t of P. tiliacea Ap«"
thecia moderate, often excentrioally perforate, badio-reddish, the
receptacle beneath blaok-setuloso, th e margin suhentire or slightly
crenulate ; spores ellipsoid, 0 ,009-11 mra. loug, 0 ,0 0 4 -6 mm. thick.
— Parmelia earporhizans Tayl. in Hook. Journ. Bot. vi. (1847)
p. 163 ; Cromb. Jo u rn . Bot. 1882, p. 272. Parmelia tiliacea (Jromb.
Lioh. Brit. p. 33 pro pa rte ; Leight. Lioh. Fl. p. 131 pro p arte, ed. 3,
p. 121 pro parte. Lichen tiliaceus Eug. Bot. t. 700.
AA’hen sterile, scarcely to be distinguished from P. tiliacea, hut at least
a good subspecies, characterized by the short, blaclrish, setulose fibrils with
Avhicli the tlialline receptacle of the fruit is densely clothed beneath. In
this respect, as pointed out by Taylor I. e., it is analogous to Physcia ulo-
thrix. The apothecia are plentiful when they occur, and frequently become
perforate, though tlie perforations are not exactly in the centre, as
in P.perforata.
Hab. On the trunks of trees in wooded maritime and upland districts.
—Histr. Local but not uncommon in S. England and the Channel Islands.
—B. AI. ; Near Jerhourg, Island of Guernsey. Lymington, Hampshire;
Chagford, Ashburton, and Cornworthy, S. Devon; Dunster Tower,
Somersetshire.