PELTIDEA.] PIOLTIGERKI. ^79 



Highlands; not seen from Ireland. — B. M. : Dartmoor, Devonshire; 

 White Force, Teesdale, Durham ; near Kendal, XN'estmorelaiid. New 

 Galloway, Kirkcudbriglitshire; Dalmahoy Hill, near Kdiuburgh ; near 

 Inverarj, Argyleshire; the Ochills, Ifaunoch, and the Tiossach.s, Perth- 

 shire. 



2. P. venosa Ach. Meth. (1803) p. 282.— Thallus small, simple, 

 asceiidin<i^ or sul)erect, ovate or nearly ilabelliformi-lobate, somewhat 

 shiniiif?, smooth, bri,i>'ht-fi;recn when moist, pale-greyish or greenish- 

 brown when dry ; beneath bearing cephalodia, white, with prominent 

 black or brownish-bhick nerves ramil'ying from the base. Apothecia 

 Buborbicular, ])lane, horizontal, somewhat large, brownish-black, the 

 margin crenulate, evanescent ; spores t)-8na3, fusiform, 3-septate, 

 colourless or pale-brown, 0,030-0,045 mm. long, 0,007-8 mm. 

 thick.— Gray, Nat. Arr. i. p. 427 ; Hook. Fl. Scot. ii. p. 59 ; Sm. 

 Eng. Fl. V. p. 215 ; Cromb. Lich. Erit. p. 28. — Peltiyera venosa Mudd, 

 Man. p. 84, t. 1. f. 23 ; Leight. Lich. Fl. p. Ill, ed. 3, p. 101. Lichen 

 venosus Linn. Fl. Suec. (1755) d. 1097; Lightf. Fl. Scot. ii. p. 844; 

 Huds. Fl. Angl. ed. 2, p. 545 ; With. Arr. ed. 3, iv. p. 69 ; Eng. 

 Bot. t. 887. Lichenoides parvimi virescens, peltis vi(/ricantibus 

 planis Bill ^Lmc. 208, t. 28. f. 109.— Brit. E.vs. : Cromb. n. 42; 

 Dicks. Hort. Sic. n. 25. 



A small plant, easily recognized by the simple or slightly lobed flabelli- 

 fomi thallus and the horizontal fructificatiou. The hypogenous cepha- 

 lodia, which from their position are very apt to he overlooked, are usually 

 visible upon the brown tomentose nerves. They " are granular, carti- 

 laginous, glaucous or glaucous-grey (at length becoming dark or blackish), 

 small, superficial, subglobose or somewhat depressed, not uufrequently 

 crowded, and contain gonimia of moderate size and moniliform, in the thin 

 cellular texture " (Nyl. Flora, ut suprn). The apothecia, which are large 

 in proportion to the size of the thallus, are horizontal, and more connected 

 with the upper than the lower surface of the margin of the thallus. 



Hub. On turf walls aud on the ground in fissures of rocks in upland and 

 alpine situations. — Distr. Local and rare in \V. England, N. Ireland,_and 

 the hilly tracts of S. Scotland ; more general in the Grampians, especially 

 in Breadalbane. — B. M. : Whiteclifte Bocks, near Ludlow, Shropshire. 

 Kirkmichael and near Moftat, Dumfriesshire ; Habbie's IIow, Pentland 

 Hills, near Edinburgh ; Menstrie Glen, near Stirling ; Stronaclachan aud 

 Finlarig, Killin, Ben Lawers and Pass of Kilhecrankie, Perthshire; 

 Reeky Linn and Clova, Forfarshire. Near Belfast, co. Antrim. 



50. SOLORINA Ach. Lich. Univ. (1810) p. 27 ; Nyl. Flora, 1884, 

 p. 219. — Thallus fragile, the cortical layer not continuous on the 

 under surface, w^hich is sometimes obsoletely nervosa and rhizinose. 

 Apothecia innate, rotundate or oblong, scattered on the upper 

 surface of the thaUus ; spores 6-8n8e, 4naB, or 2nae, fusiformi- 

 oblong or ellipsoid, bilocular, brownish or reddish-brown; hy menial 

 gelatine (and the thecse) bluish with iodine. Spermogones un- 

 known. 



The rhizinose thallus and innate fructification separate this from the 

 preceding gentis. The apothecia are at first covered with a thalline veil, 



