BRITISH LICHENS

LECI:DEA LECtDEACElE 17
what rare in England, but plentiful where it occurs.-lJ. .Jf. Henham,
Suffolk; Hampstead and near Hendon, MIddlesex; Keston, Kent;
near Reigate. Surrey; Ardingly (saxicolous), Sussex; New Forest,
Hants; TotterIdge and near Elstree, Herts; Hoe Street, Walthamstow,
Gosfield Hall and Brentwood, Essex; near Ampthill, Bedfordshire;
Twycross, Leicestershue; Hay Park, Herefordsp.ue; near Worcester
and LIttle Malvern, Worcestcrshire; Harboro' Magna, ViTarwickshire;
Haughmond Hill, the W rekin and Church Stretton, Shropshire;
Westerdale and Stagdale, Cleveland, Yorkshire.
Var. myrmecina Ny!. Lich. Scand. 243 (1861).-Thallus with
the squamules tawny- or chestnut-brown. Apothecia naked.
-Lectdea scalans var. myrmecina Ach. Meth. 78 (1803).
Differs merely in the colour of the thallus and in the constantly
naked apothecm. In the single BrItIsh speCImen, which is only very
sparingly fertile, the squamules are nearly erect.
Hab. On a decorticated stump of an old oak in a wooded upland
sItuation.-B. M. Bramble HIll, New Forest, Hants.
10. L. acutula Ny!. in Flora lxix. 100 (1886).-Thallus effuse,
thm, granular-squamulose, greyish-green or greyish-brown (K -),
the squamules minute, subimbncate, somewhat convex and
difform. Apothecia small, thin, black, margmed, often angulose
and subplicate, the margin thin, somewhat acute; paraphyses
subdiscrete; epithecium and hypothecium olive-brownish-black;
penthecium dark (K + obsoletely purplish); spores fusiform,
12-15 !l. long, 2·5-3·5 !l. thick; hymenial gelatine not tinged but
the aSCI wine-reddish with iodme.
DIstinguished from L. ostreata by the closely packed gibbous
squamules.
Hab. On bark of pine in upland situations.-B . .Jf. Penrith Beacon,
Cumberland. (SpeCImen also receIved from Bouly de Lesdains, N.
France.)
11. L. decipiens Ach. Meth. 80 (1803).-Thallus indeterminate,
squamulose, appressed, reddish or pale-flesh-coloured, white
beneath; the squamules more or less scattered, subflexllose or
subcrenate, and often whItish at the margins (K -, CaCl -).
Apothecia marginal, adnate, plane or convex, blackish, the
margin thin, entire, at length evanescent; hypothecium palebrown;
paraphyses concrete, brown towards the apices; spores
ovoid or ellipsoid, 12-16 !l. long, 5-6 !l. thick; hymenial gelatine
bluish with iodine.-Cromb. Lich. Brit. 76; Leight. Lich. F!.
249; ed. 3, 240; Hook. F!. Scot. ii. 41. Lichen decipiens Ehrh.
in Hedw. Stirp. Crypt. ii. 7 (1789); Dicks. Crypt. fase. ii. 21;
With. Arr. ed. 3, iv. 26; Eng!. Bot. t. 870. Lepidoma decipiens
S. F. Gray Nat. Arr. i. 462 (1821). Psora decipiens Hook. in
Sm. Eng!. Fl. v. 193 (1833); Mudd Man. 171.
Exsicc. Leight. n. 334.
An earlier designation, Lichen pezizoides, had been given to this
lichen by Swartz (N. Act. Ups. iv. 247 (1784)), but that name had
IT C