BRITISH LICHENS

116 CYCLOCARPINE}E BIATORELLA
(b) Spores globose.
3. B. ochrophora Th. Fr. Lich. Scand. 399 (1874).-ThaUus
effuse, very thin, occurring in patches (K -, CaCI -), or usually
obsolete. Apothecia small, convex, at length subglobose, immarginate,
yellowish-pruinose, sordidly pale within; paraphyses
slender, discrete, often irregular; hypothecium colourless; epithecium
minutely granulose, yellow-ochraceous (K + rose-violet);
spores spherical, 3'5-4'5 [L in diameter; hymenial gelatine bluish
with iodine.-Lecidea ochrophora Nyl. in Flora xlviii. 355 (1865);
Carroll in Journ. Bot. vii. 100 (1868); Cromb. Lich. Brit. 75;
Leight. Lich. Fl. 354; ed. 3, 383.
Distinguished amongst its allies by the ochraceous-pulverulent
apothecia, which are at times several aggregate; when the powdery
surface is rubbed off they become brown.
Hab. Spreading over decayed mosses on trunks of trees in maritime
and upland districts.-Distr. Very local and rare in the Channel
Islands, Wales and S.W. Ireland.-B. M. Rozcl, Jersey; Harlech,
Mcrioneth; Dinish, Killarney, Kerry.
4. B. moriformis Th. Fr. Lich. Scand. 401 (1874).-Thallus
effuse, thinnish or thin, granulose-Ieprose, greyish or brownishgrey
(K + yellow, CaCI + red), often evanescent. Apothecia
submoderate or small, sessile, somewhat plane or convex, immarginate,
blackish or brownish-black, greyish within; paraphyses
very slender, indistinct, the epithecium reruginous-green or darkbrownish
olive; hypotheeium colourless; asci tumid; spores
globose, minute, 2'5-3'5 [L in diameter; hymenial gelatine deepblue
then dark with iodiae.-B. resinm var. rubicundlllm :Mudd
Man. 191 (1861). Arthom'a morifo1'1nis Ach. Syn. 5 (1814).
Lecidea tant111a Nyl. III Act. Soc. Linn. Bord. ser. 3, i. 363 (1856);
Cromb. Lich. Brit. 76; Leight. Lich. Fl. 354; ed. 3, 382. L.
improvisa Nyl. in Not. SaUsle. Faun. & Fl. Fenn. iv. 233 (1859);
Cromb. Lich. Brit. 76.
Exsicc. Leight. nos. 408, 411 (as Lecidea tantilla).
The thallus, greyish-green when moist, varies somewhat in thickness,
and is often either almost absent or obliterated by other lichens
associated with it; it usually spreads extensively over the substratum,
especially when subevanescent. The apothecia are numerous, scattered
or approximate, unequal, sometimes two together; when moistened,
or when the plant grows in shady situations, they are reddish-brown.
Hab. On old palings in lowland and upland tracts.-Distr. Somewhat
plentiful throughout England, rare in Wales, not recorded from
Scotland or· Ireland.-B. M. Penshurst, Kent; Reigate, Surrey;
Mill Hill, Middlesex; near Baunton and near Cheltenham, Gloucestershire;
Spetchley, Whittington and Hindlip, Worcestershire; Stableford,
Port Hill, near Shrewsbury, Neescliff, Wellington, Upton Magna
and Bomere Pool, Shropshire; Nannau, Dolgelly, l'I'Ierioneth; near
Hedcar and Stokes!ey, Cleveland, Yorkshire.