312 LICHENACEI. [PHYSCIA. 



variety. Leight. Lich. Fl. ed. 3, p. 141 ; Cromb. Grevillea, xv. 

 p. 78. 



Might be taken for a state of P. obscura or P. ccesia esorediate, from 

 both of which it is readily distinguished by the marginal cilia. It is 

 closely allied to the preceding variety, from which it differs in the colour 

 of the thallus and of the cilia, and in the almost entire absence of rhizinoe 

 on the under surface. In the few British specimens there are no apo- 

 thecia. 



Hob. On rocks in maritime districts. Distr. Only in the Channel 

 Islands, the S.W. Highlands of Scotland, and N.W. Ireland ; no doubt 

 to be detected elsewhere. B. M. : La Moye, Island of Jersey. Barcal- 

 dine, Argyleshire. Leenane, co. Galway. 



Subsp. 1. P. tenella Nyl. Flora, 1874, p. 306. Thallus subeffuse, 

 narrowly laciniate ; lacinise ascending, usually tubuloso-inflated or 

 fornicate at the apices, white fibrilloso-ciliate at the margins. 

 Apothecia small or moderate, the margin entire or crenulate. 

 Cromb. Grevillea, xv. p. 78. Physcia stellaris var. tenella Cromb. 

 Lich. Brit. p. 39 : Leight. Lich. Fl. p. 151, ed. 3, p. 141. Borrera 

 hispida /3. tenella Mudd, Man. p. 106. Parmelia tenella Tayl. in 

 Mack. Fl. Hib. ii. p. 147. Borrera tenella Gray, Nat, Arr. i. p. 431 ; 

 Hook. Fl. Scot. ii. p. 56 ; Sm. Eng. Fl. v. p. 222. LicJien teneltus 

 Scop. Fl. Cam. (1760) p. 1406 ; Eng. Bot. t. 1351 With. Arr. 

 ed. 3, iv. p. 56. Lichen ciliaris /3. Huds. Fl. Angl. ed. 2, p. 538 ; 

 Lightf. Fl. Scot. ii. p. 828. Lichenoides nispidum minus et tenerius, 

 scutellis nigris Dill. Muse. 152, t. 20. f. 46, c, v.Brit. Exs. : 

 Leight. n. 174 ; Mudd, n. 78 ; Cromb. n. 151 ; Larb. Lich. Hb. 

 n. 330 ; Bohl. n. 20. 



Looks at first sight as if it were a distinct species. It is readily recog- 

 nized by the hooded-like apices of the ascendant lacinise, though these 

 finally become sorediate. The thallus and the marginal cilia, which are 

 either simple or variously divided, often become darker-coloured in age, 

 or when growing in dry exposed places. The apothecia are not unfre- 

 quent, and the spermogones are often numerous. 



Sab. On the trunks and branches of trees, old walls, and occasionally 

 boulders in maritime and upland districts. Distr. General and common 

 in Great Britain ; apparently rare in Ireland and the Channel Islands. 

 B. M. : La Moye, Island of Jersey ; Island of Guernsey. Earsham, Nor- 

 folk ; Bury St. Edmunds, Suffolk"; Walthamstow, Essex; Shanklin, Isle 

 of Wight ; Plymouth, Devonshire ; near Penzance and Withiel, Corn- 

 wall ; near Cirencester, Gloucestershire ; Twycross, Leicestershire ; Grims- 

 bury Green, Northamptonshire ; Buxton, Matlock, and Darley, Derby- 

 shire ; Herefordshire Beacon and Malvern, Worcestershire ; Haughmond 

 Hill, Shropshire ; Tenby, Pembrokeshire ; near Usk, Monmouthshire ; 

 Dolgelly and Llyn Bodlyn, Merionethshire ; Island of Anglesea ; near 

 Stokesley and Kildale, Cleveland ; Croft Head, Westmoreland ; Holy 

 Island, Northumberland; near Ashy, Cumberland. Swanston Wood, 

 near Edinburgh ; Appin, Argyleshire ; Killin and Ben Lawers, Perth- 

 shire ; Montrose, Forfarshire ; Castleton of Braemar, Aberdeenshire. 

 Carrigaloe, co. Cork ; Dromorelaud, co. Clare. 



