BRITISH LICHENS
BRITISH LICHENS
BRITISH LICHENS
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APPENDIX TO PART I<br />
TUE genera and species described below are emendations or<br />
addItions to Part I (published in 1918). Their place in the text<br />
is indicated.<br />
Family I. CALICIACElE.<br />
After Stenocybe byssacea, p. 20, add :-<br />
Stenocybe bryophila Wats. in Journ. Bot. lxiii. 130 (1925).<br />
Thallus little evident, obsolete or none proper. Apothecia<br />
stalked, 1-1·5 mm. long, dark or greyish, often with a bluish<br />
tinge, somewhat shining, especIally at margin of disc'; capitulum<br />
clavate-truncate, with the margin of the disc inflexed; paraphyses<br />
not very evident, sometimes showing as more or less entangled<br />
hyaline filaments; ascus cylindrical, about 350 tJ. long, 25 tJ. wide,<br />
narrowed at base, bluish with iodine; spores 8 in the ascus, darkbrown,<br />
obliquely I-seriate, 3-septate with paler and smaller endcells,<br />
35-40 tJ.long, 12-15 tJ. thick; asci and paraphyses bluish with<br />
iodine.<br />
IIab. On stems of Hepatics on rocks or trees.-B. M. Cwm-y-glo,<br />
Llanbcris (on rocks, W. 'Watson), Cennant l\fawr, Nantygwrhyd,<br />
Snowdonia (on alder, D. A. Jones), Carnarvonshire.<br />
Family IV. PYRENOPSIDACElE.<br />
After Psorotichia pyrenopsoides, p. 42, add :-<br />
Psorotichia lugubris Dal. Tor. & Sarnth Flecht. Tirol. 592<br />
(1902); A. L. Sm. MQnogr. i. 487.-Thallus indeterminate,<br />
thickish, minutely squamulose, granulose-concrete, breaking up<br />
into crumb-like portions, brownish or chocolate-grey (K-,<br />
CaCI-); hypothallus black. Apothecia generally scattered,<br />
small or submoderate, superficial, plane, margined, black, the<br />
margin thickish, prominent, entire, occasionally subflexuose,<br />
persistent; paraphyses slender, very loosely coherent, thickened<br />
at the apices,. the epithecium dark-green; hypothecium blackishbrown;<br />
spores spherical or subspherical, halonate, 8-9 tJ. diam.<br />
(or 12-15 tJ. X 9-12 tJ.); hymenial gelatine bluish with iodine.<br />
Lecidea lugubris Sommerf. Suppl. Fl. Lapp. 143 (1826), pro parte;<br />
Nyl. in Bot. Not. 176 (1852); Linds. in Quart. Journ. Microsc. Sci.<br />
v. 177, t. 11 (1857); Cromb. Lich. Brit. 85; Leight. Lich. Fl.<br />
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