296 LICHENACEI. [PHYSCIA. 



coloured thallus, which is generally more or less sprinkled with yellowish- 

 white soredia. Sometimes it is paler towards the base and on the under 

 surface ; when growing in moist shady places it is somewhat greenish. It 

 varies considerably in size occasionally spreading rather extensively, but 

 frequently stunted in small densely csespitose tufts. The apothecia are 

 extremely rare in Great Britain, and when they occur are few and small. 

 The spermogones, which are more frequent, are scattered, usually some- 

 what prominent, with spermatia as in P. parietina, but rather thinner and 

 pistillar. 



Hob. On the trunks and branches of trees and shrubs, sometimes on 

 rocks and walls, chiefly in maritime districts. Distr. Usually plentiful 

 where it occurs, in S. and W. England, N. Wales, in 8. Ireland, and 

 formerly in S.W. Scotland (Ailsa Craig). B. M. : Islands of Sark, Alder- 

 ney, and Guernsey. Lydd, Kent ; St. Leonard's Forest, Fairlight Glen 

 near Hastings, and Lewes, Sussex ; Brockenhurst, New Forest, Hants ; 

 near Ventnor, Hyde, Appuldurcombe, and Shanklin, Isle of Wight ; near 

 Totnes, Lydford, Widdecombe, South Brent, and Torquay, Devonshire ; 

 Bocconoc/Penzarice (fit.), Withifll, and Bude, Cornwall; Malvern Hills, 

 Worcestershire ; Aberdovey and Barmouth, Merionethshire ; Holyhead, 

 Island of Anglesea. Lambay Island, co. Dublin ; Whiting Bay, co. 

 Waterford ; near Cork, Castlebernard Park, Bandon, and Cape Clear, co. 

 Cork. 



2. P. chrysophthalma DC. Fl. Fr. ii. (1805) p. 40 L Thallus 

 crespitoso-fruticulose, rigid, lacero-laciniate, yellow or yellowish- 

 white ; beneath whitish, laciniae narrow, ascending, divaricato- 

 raultifid, piano or concave, the apices fibrilloso-ramulose or spinose 

 (K+ purple , CaCl~). Apothecia subterminal, moderate or large, 

 concave or somewhat plane, orange-coloured, the margin fibrilloso- 

 ciliate ; spores 0,011-17 mm. long, 0,006-10 mm. thick. Cromb. 

 Lich. Brit. p. 37 ; Leight. Lich. Fl. p. 141, ed. 3, p. 131. Borrera 

 chrysophthalma Gray, Nat. Arr. i. p. 435 ; Sm. Eng. Fl. v. p. 233 ; 

 Mudd, Man. p. 112, t. ii. f. 34. Lichen chrysophthalmus Linn. 

 Mant. ii. (1771) p. 311 ; Eng. Bot. t. 1088. Lichenoides pulmo- 

 narius minimus subluteus, receptaculis florum coronatis, mali aurantii 

 coloris (Mich.) Dill. Muse. 74, t. 13. f. 17. Brit. Exs. : Leight. 

 n. 394 ; Larb. Cassar. n. 22 ; Bohl. n. 122. 



Much smaller than the preceding, from which it is readily distinguished 

 by the thallus and fructification. With us it occurs only in small scat- 

 tered tufts, and is but little variable. It is generally well fruited, the 

 apothecia being sometimes numerous and crowded. The spermogones are 

 scattered towards the extremities of the laciniae, with the spermatia a 

 little more slender than in the following species. 



Hab. On the trunks and branches of trees in orchards, rarely on old 

 pales, in maritime districts. Distr. Rather local and scarce, in the 

 Channel Islands, S. England, and S. Ireland ; very doubtful in S.W. 

 Scotland. B. M. : Rozel and St. Brelade's, Island of Jersey ; Islands of 

 Sark and Guernsey. Near Brighton and Lewes, Sussex ; near Hyde, Isle 

 of Wight ; Ilsham Walk, near Torquay, S. Devon. Carrigalim and Kil- 

 britain, co. Cork ; Muckrone, co. Kerry. 



Form 1. Dickieana Nyl. Syn. i. (1860) p. 410. Thallus small, 



