:j
' ri: \
11.1513. Parmelia tereii’ffto (Hoffm.), Mudd, JIau . p. 07. Parmelia
(liatrijjia Hook. HI. Soot. ii. p. 56 ; Sm. Hiig. HI. v. p. 2 0 4 ; ï a y l .
ill Mack. HI. Hib. ii. ji. 150. Physcia diatrypa Ora}', Nat. Arr.
i. p. 436. Lichen dia tryp u s Sm. Eug. Hot. t. 1248.—B r it. E xs. :
Leight. II. 264 ; Larb. Cæsar. n. 60 ; Cromb. n. 145.
Iu general appearance like small states of P. physodes, from which,
apart from the eliemical reaction of the meduUa and the nuiuber of tlio
spores, the peculiar perforations in the laciniæ at ouce distinguish it.
The tliallus is usually sprinkled with round whitish soredia (form
sorcdiohola Nyl.). In this country it has uot occurred fertile. The spermogones,
which are very seldom present iu our specimens, are as iu
P. physodes.
Hah. On rocks among mosses and on the trunks of trees in maritime
aud upland districts.—Drirfr. Local in the Channel Islands, S.W. England,
N. Wales, S. Scotland and tho W. Highlands, in S.W. and N.
Ireland.—1!. 51.; Bonne Nuit, Island of Jersey. New Forest, Hauls;
Bolt Head and Valley of Hocks, Lynton, Devonshire; near Feuzance and
aud Jlimkerroii, co. Kerry; Connemara, co. Oalway; Cusheudun, co.
Antrim.
43. PA RMELIOPSIS Nyl.
Lich. Scand. (1861) p. 105 (u t
scctio I ’armelim); Not. Siillsk.
pro F. ot Fl. Fen n . Forh.
11. ser. V. (1866) p. 121.—
Thallus small, th in , appressed,
s te lla te ; beneath sparingly
fibrilloso-rhizinose. Apothecia
small, parmelioid ; p a ra physes
not d isc re te ; spores
Sum, simplo, more or less
ellipsoid, colourless; hymenial
gelatine bluish with
iodine. Spermogones scattered,
a t length slightly prominent
; sterigmata short,
simple ; spermatia loug, aei-
cular, arcuate.
A small genus separated from
Parmelia on account of its
spermatia, which are like those
of Squamaria iu the Lecanorei,
but the thalius shows that it
belongs to this tribe. Two of
its three European species oeeur
sparingly iu Great Britaiu.
A'i
Fig. 4,0.
Pannelwpsis amliigua Nyl.—a. Vertical
section of a young portion of thallus,
with a rhizina beueath, X 200. b. Vertical
section of an apotheciuin, xSO. c.
A theca, XboO. d. Spores, x500. e.
Vertical section ol' thallus with a spernio-
gone (on the left beneath, a rhizina),
X yO. /. Sterigmata and spermatia, x 500.
1. P. am b ig u a Nyl. Not. Sallsk. piro F . ot .Fl. F . Forh. n. ser. v.
(1866) p. 12 1 .—Thallus stellato-orhicular, appircssed, closely adnate,
imbricato-laciniate, opaque, straw-coloured, sulphureo-sorodiate ;
beneath brownish-black ; laoiniæ somewhat narrow, plane, multifid
(K Z ) CaCl“ ). Apotheoia small, piano or slightly convex, the
margin entire or ohsoletely orenulate ; sporos oblong or ovoid-
oblong, often somowhat curved, 0 ,007-11 mm. long, 0 ,0 0 2 5 -3 5 mm.
tliick.—Cromb. Lich. Brit. p. 37.—Parmelia amhigua Borr. Eng.
Bot. Suppl. t. 2796 (two lower figs.) ; Hook. F l. Soot. ii. p. 55 ;
Sm. Eng. Fl. v. p. 37 ; Leight. Lioh. El. p. 127, ed. 3, p. 118.
Lichen amhiguus AA’ulf. in Jacq. Coll. iv. (1790) p. 239. Parmelia
d iffu sa Mudd, Alan. p. 103.—B r it. Exs. : Leight. n. 373 ; Aludd,
n. 75 ; Cromh. n. 146.
The thallus is not unlike th at of Parmelia Mougeotii, and is more or
less sprinkled with soredia, which are normally convex and often con-
lluent. In this country the apothecia are rare. The spermogones, which
are more frequent, are very minute, blackish, sparingly scattered, with
spiermatia 0,018-25 mm. long, 0,005 mm. thick.
Jlab. About the roots of fir trees, and occasionally on old fir pales, in
wooded, upland, and inountainous districts.—Distr. Local, though common
where it occurs, iu S., Central, W., and N. England, N. AVales, the Central
Highlands, Scotland ; not seen from Ireland.—B. AI. ; Ightham, Kent ;
Twycross and Gopsall Park, Leicestershire ; near Oswestry, Shropshire ;
Cwm Bychan, Merionethshire ; Ingleby Greenhow, Yorkshire. Killin,
Perthshire ; Kinnordy, Forfarshire ; Alar Forest, Braemar, Aberdeenshire
; Larig Grue, Banffshire ; Rothiemurchus, Inverness-shire.
2. P. a le u r ite s Nyl. Flora, 1872, ji. .248.—Thallus stellato-orbi-
cular, closely appressed and adherent, laciniato-lobed, greyish-white,
whitish pulverulento-sorediate ; beneath brownish-black, sparingly
fibrillose ; laciniæ somewhat convex and rugoso-plioate in the
centre, piano and lin e a r a t th e oiroumferenoe CaClZ)-
Apothecia small or n e arly moderate, concave or somewhat plane,
brownish- or reddish-spadioeous, shining, the margin slightly crenn-
late ; spores oblong or fusiformi-oblong, usually somewhat curved,
0 ,0 1 1 -1 2 mm. long, 0 ,0 0 3 -4 mm. thick.—Cromb. Journ. Bot. 1872,
p. 234.—Lichen aleurites Aob. Prodr. (1798) p. 117. Parmelia
amhigua Borr. Eng. Bot. Suppl. t. 2706 (two upper figs.). P a rmelia
hyperopia Aludd, Alan. p. 91 ; Leight, Lioh. Fl. od. 2, p. 478,
cd. 3, p. 119.
Externally little different, except in colour, from the preceding. The
thallus, which is sometimes dark-greyish, is sprinkled towards the centre
with white, scattered, roundish soredia. In ,the very few British specimens
there are only one or two small apothecia with subentire margin.
The spermogones, also rarely present, have the spermatia 0,0023-30 mm.
long, 0,0005 mm. thick.
Hab. On the trunks of old firs near the. roots and on old fir pales in
mountainous districts.—Distr. Very local and scarce in the N. Grampians,
Scotland.—B. AI. ; Glen Derry and Glen Dee, Braemar, Aberdeenshire
; Larig Grue, Bauffsliire.