296 XICHEXACEI. [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 cfespitose tufts. The apothecia are 

 exh'emely rare in Great Britain, and when they occur are few and small. 

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

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

 pistillar. 



Hub. On the ti-unks and branches of trees and shrubs, sometimes on 

 rocks and walls, chiefly in maritime districts. — I)istr. Usually plentiful 

 where it occurs, in S. and W. England, X. Wales, in S. 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, Xew Foi-est, Hants ; 

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

 Totnes, Lydford, Widdtcombe, South Breut, and Torquay, Devonshire ; 

 Bocconoc, Penzance (frt.), "S^'ithiel, and Bude, Cornwall; Malvern Hills, 

 Worcestershire ; Aberdovey and B.irmourh, Merionethshire ; Holyhead, 

 Island of Anglesea. Lauibay Island, co. DubUn : Whiting Bay, co. 

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

 Cork. 



2. P. chrysophthalma DC. Fl. Fr. ii. (1S0.5) p. 4iJl.— Thallus 

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

 ■white : beneath whitish, laciniae narrow, ascending, divaricato- 

 multifid. plane or concave, the apices fibrilloso-ramulose or spinose 



(Kj^P'^'^P ^, 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 

 chrysopJitJialma Gray, Xat. Arr. i. p. 435 ; Sm. Eng. Fl. v. p. 233 : 

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

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

 narius minimus subluteus, receptaculis Jlornm coronatis, maliaurantii 

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

 n. 394 ; Larb. Casar. n. 22 ; Bohl. u. 122. 



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

 by the thallus and fructification. With us it occui-s 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 laciniaj, with the spermatia a 

 little more sleuder than in the following species. 



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

 pales, in maritime districts. — Di'^tr. Rather local and scarce, in the 

 Channel Inlands, 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. Xear Brighton and Lewes, Sussex ; near Kyde, Isle 

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

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



Form 1. Dickieana Xyl. Syu. i. (1860) p. 410.— Thallus small, 



