128 CYCLOCARPINEE [PARMELIA 
ce. Thallus olivaceous or brownish. 
11. P. subaurifera Nyl. in Flora lvi. p. 22 (1873).—Thallus 
orbicular, thin in texture, closely appressed, crumpled and lobate, 
olive- or umber-brown, with a yellowish medulla, generally 
glabrous at the circumference, isidiose towards the centre and 
more or less sprinkled with yellowish soredia, the lobes rounded 
and crenate, beneath blackish, shortly fibrillose, lighter coloured 
and bare at the edge (K & yenowishn, CaCl F reaaisn)» Apothecia 
small, dark chestnut-coloured, the margin subentire, often yellow- 
sorediate ; spores 11-13 p long, 7-8 p thick.—Cromb. in Journ. 
Linn. Soc. xvii. p. 572 (1880) & in Grevillea x. p. 25 (1881). 
Lichenoides olivaceum, scutellis levibus Dill. Hist. Muse. p. 182, 
t. 24, fig. 77 c (1741). Lichen olivaceus var. 3 With. Arr. ed. 3, 
iv. p. 35 (1796) (fide Crombie Monogr. i. p. 252). 
Exsicc. Larb. Lich. Hb. 210. 
Differs from allied species in the yellow medulla and scattered 
soredia, a character more distinctly marked in northern specimens 
(cf. P. Mougeotii). Apothecia are extremely rare; they occur on 
only one of our specimens, collected at Penzance. Spermogones are 
also very rare; spermatia 5 u long, 1 u thick. 
Hab. On the trunks of trees, chiefly oaks and firs, also on branches 
of shrubs.—Distr. Rare in N. Wales, the Highlands of Scotland and 
N.W. Ireland.—B. M. Near Penzance, Cornwall; Henfield, Sussex ; 
Lydd, Kent; Gopsall Park, Leicestershire; Wimpole Park, Cam- 
bridgeshire; Kempsey, Worcestershire; Aberdovey, Merioneth ; 
Bettws-y-Coed, Carnarvonshire; Ayton, Cleveland, Yorkshire ; 
Hindburndale, Lancashire; Windermere, Westmoreland; Glen 
Lochay, Perthshire; Durris, Kincardineshire; near Banchory, 
Aberdeenshire ; Applecross, Rossshire; Kylemore, Galway. 
12. P. Mougeotii Scher. Enum. Lich. p. 46 (1850).—Thallus 
rather small, orbicular, appressed and closely adnate, generally 
darker and subareolate in the centre, greenish or greyish-yellow 
towards the outside, usually sprinkled with small yellowish-white 
soralia, the laciniz narrow, linear, multifid, slightly convex and 
spreading at the apices, frequently transversely cracked, beneath 
brownish-black, with very short rhizinze, smooth at the edges 
(K + yellowish, CaCl —). Apothecia rare, minute, reddish- 
brown, the margin pulverulent; spores 8-10 p» long, 5-6 p» 
thick.—Mudd Man. p. 102; Cromb. Lich. Brit. p. 34. P. con- 
spersa f£. Mougeotii Leight. Lich. Fl. p. 136; ed. 3, p. 125. 
Lichen incurvus Sm. Engl. Bot. t. 1375 (1804) pro parte 
(non Pers.). 
Exsice. Cromb. n. 143; Larb. Lich. Hb. nos. 87, 251; 
Leight. n. 143; Mudd n. 74. 
Distinguished by the linear appressed lobes and by the yellowish 
soredia. It has frequently been considered as allied to P. conspersa, 
but the smooth edges of the under surface place it in this section. 
