486 LICHEXACEI. [lECAXOEA. 



191. L. smaragdula Xyl. Flora, 1872, p. 429.— Thallus squa- 

 mulose, greenish or greenish-brown, the squamules plane or slightl)' 

 convex, rounded, more or less discrete (K — , CaCl — ). Apothecia 

 minute, punctiform, immersed, solitary or several in each squamule, 

 dark-bro\vn ; spores about 0,0u3-4 mm. long, scarcely 0,UUl mm. 

 thick ; hymenial gelatine pale blue, then tawny with iodine. — 

 Cromb. Grevillea, xix. p. 58. — Lecanora fuscata var. smaragdula 

 Cromb. Lich. Brit. p. 56. L. squamulosa forma smaragdula Leight. 

 Lich. Fl. p. 1S4, ed. 3, p. 169. Acarospora cervina B. smaragdula et 

 T). pr'ivigna Mudd, Man. p. 159. Endocarpon smaragdulum Wahl. in 

 Ach. Meth. Suppl. (1803) p. 29 ; Hook. Fl. Scot. ii. p. 44 ; Sm. Eng. 

 Fl. V. p. 158 ; Gray, Xat. Arr. i. p. 499 ; Leight. Angio. Lich. p. 16, 

 t. 4. f. 3. Lichen smaragdidus Eug, Bot. t. 1512. Etulocarpon rufo- 

 virescens Tavl. in Mack. Fl. Hib. ii. p. 100. — Brit. Exs. : Leight. n. 271 ; 

 Mudd, n. 132. 



Looks distinct but, as already intimated, probably descends from L. ru- 

 fescens, of which it would then be a subspecies characterized by the small, 

 scattered gquamules aud the minute apothecia. The former, however, are 

 at times more approximate aud when much scattered are only sparingly 

 fertile. 



Hab. On rocks and walls in maritime and upland districts. — Distr. 

 Piatber local iu Great Biitain, rare in S."\V. Iieland and the Channel 

 Islands. — B. M. : Island of Guernsey. Bedruth, Cornwall ; AVickwar, 

 Gloucestershire : Barmouth, Merioneth : Ilowden Gill and near Ay ton, 

 Cleveland, Yorkshire : Teesdale, Durham ; near Hexham, Northumber- 

 land ; near Kendal, Westmoreland. Barcaldine, Argyleshire ; King's 

 Park, Stirling, Ben Lawers, Perthshire : S. of Bay of Nigg, Kincar- 

 dme^hire. Berriquin and Sybil Head, co. Keny ; near Kylemore, co. 

 Gal way. 



Form sinopica Xyl. ex Xorrl. Xot. Sallsk. pro F. et Fl. Fenn. 

 Forh. t. xiii. (1873) p. 332. — Thallus areolato-squamulose, rusty- 

 red. Apothecia black.^ — Cromb. Grevillea, xix. p. b'd. — Lecanora 

 fuscata var. sinopica Cromb. Lich. Brit. p. 56. L. squamulosa forma 

 sinopica Leight. Lich. Fl. p. 184, ed. 3, p. 170. Acarospora cervina 

 Z^. sinopica Mudd, Man. p. 160. Endocarpjon sinopicmn Wahl. in 

 Ach. Meth. Suppl. (1803) p. 30 ; Sm. Eng. Fl. v. p. 159 ; Gray, 

 xSat. Arr. i. p. 499. E. smaragdulurn /3. sinopjicum Leight. Angio. 

 Lich. p. 16, t. 5. f. 1. Lichen sinopicus Eng. Bot. t. 1776 (upper 



fig-). 



Differs merely in the colour of the more contiguous thallus and in the 

 darker apothecia, which are more frequently solitary in the squamules. 

 The ferruginous colour, as in other instances, is owing to suffusion from 

 peroxide of iron. 



Hab. On rocks and botUders, chiefly schistose, in mountainous regions. 

 — Distr. Only in X. Wales aud ou the Scottish Grampians.— B. M. : Dol- 

 gellv, Merionethshire ; Aber aud Beddgelert, Carnarvonshire ; Island of 

 Anglesea. Achrosagan HiU, Appiu, Argyleshire ; Killiu, Ben Lawers, 

 aud Ben Vrackie, Perthshire ; Glen Cluuy, Braemar, Aberdeenshire ; 

 Glen Nevis, Inverness-shire. 



