190 LKCANO-LK(JIJ)JiKl [kHIZOCARPON 



Hnh. On rocks and stones. — D'lHtr. General and common in the 

 Channel Islands and England and AVales. Somewhat rare in Ireland, 

 rare in Scotland. — B. M. Green Island, Jersey ; near Lewes, Newhaven 

 and Downs, Sussex; Ncwlyn Cliff, Cornwall; Shanklin, I. of Wight; 

 near Cirencester and Selsby Hill, Gloucestershire ; Walthamstow, 

 Little Baddon and Wickhani Bishops, Essex ; Twycross, Leicester- 

 shire ; near Tenby, Pembrokeshire ; Llangollen, Denbighshire ; Mal- 

 vern, Worcestershire ; near Yarmouth and Market Dcreliam, Norfolk ; 

 Cherry Hinton Church, Cambridgeshire ; Pinching Thorpe Wood and 

 near Ayton, Cleveland, Yorkshire ; Hartside Fell, Cumberland ; Ben 

 Lawers, Perthshire ; near Cork ; Ross, Clare ; Killcry ]3ay, Letter- 

 more and Dougliruagh Mt., Connemara, Galway. 



4. Rh. chlorophaemn A. L. Sm. — Thallus yellowish-white, 

 warted or cracked-areolate, unequal, scattered or subdeterminate 

 (K -f yellow, then red). Apothecia small, subinnate-sessile, 

 black, slightly pruinose, plane or convex ; hypothecium dark- 

 brown; paraphyses rather stout, discrete, thickened and brown 

 at the tips ; spores dark-brown, oblong, 3-septate and irregularly 

 muriform, brown, without an epispore, 0,015-20 mm. long, 

 0,010-12 mm. thick ; hymenial gelatine blue with iodine. — 

 Lecidea chlorophea Hepp. ex Leight. Lich. Fl. p. 328 (1871); 

 ed. 3, p. 348. 



Closely allied to f. cpi])Glia of the preceding species, but differing 

 in the more constantly muriform spores and in the thalline reaction. 



Hah. On rocks and flints. — Distr. Rare in S. England and S. 

 Wales.— j5. M. S. England ; Tenby, Pembrokeshire. 



5. Rh. soreumidium A. L. Sm. — Thallus pale or pallid-greyish, 

 thickish, wrinkled or warted-congested, limited (K— , CaCl — ). 

 Apothecia crowded, sessile, small at first, plane, wrinkled, 

 margined and bluish-grey-pruinose, becoming convex and im- 

 marginate and often connate ; hypothecium dark-brown or 

 brownish ; paraphyses indistinct, somewhat irregular, dark-brown 

 at the tips and granular-inspersed ; spores ellipsoid, 3--septate and 

 generally muriform, brown, 0,013-20 mm. long, 0,008-10 mm. 

 thick ; hymenial gelatine deep-blue with iodine. — Lecidea soreu- 

 mldia Stirton in Scott. Nat. iv. p. 29 (1877); Leight. Lich. 

 Fl. ed. 3, p. 375. Specimen not seen. 



Perhaps only a form of Bh. alhoatrimi. 



Hah. On dead wood. — Distr. x\lpine districts in Scotland (Ben 

 Brecht, Argyll). 



6. Rh. geogTapiiicum DC. Fl. Fr. ii. p. 365 (1805).— Thallus 

 citrine or bright-greenish-yellov/, determinate, thickish or rather 

 thin, areolate, the areolae smooth, plane, contiguous or sub- 

 contiguous (K — , CaCl — , medulla I -[- bluish) ; hypothallus 

 black. Apothecia small or moderate in size, innate, plane or 

 somewhat convex, marginate, black ; hypothecium blackish ; 

 paraphyses conglutinate, variously dark-coloured at the apices ; 



