314 11CHENACEI. [PHYSCTA. 



Physcia stellaris var. aipolia f. antlielina Nyl. Lich. Scand. p. 111. 

 Lichen anthdimn Ach. Prodr. (1798) p. 111. 



The narrower and more discrete laciniae, which are either entirely 

 smooth or somewhat rugose, distinguish this variety. In what Acharius 

 subsequently (Lich. Univ. p. 478) regarded as the more typical state, the 

 lacinise are c jntinuous from the centre to the circumference, when it is 

 eutirely analogous to var. angustata of P. pulverulenta. In the few British 

 specimens the apothecia are numerous. 



Hab. On the trunks and branches of trees in maritime and upland 

 districts. Distr. Only sparingly in S. Entrland and S.W. Ireland. 

 B. M. : Henfield, Sussex ; near Ryde, Isle of Wight ; Ilsham Valley, 

 near Torquay, Devonshire. Muckruss Demesne, Killarney, co. Kerry. 



Var. y. cercidia Nyl. ex Lamy, Bull. Soc. Bot. t. xxv. (1878) 

 p. 384. Thallus whitish or greyish-white, somewhat rugose, be- 

 neath with blackish rhmnae ; lacinias contiguous, somewhat convex, 

 short, difforin and crowded in the centre, plane and broader at the 

 circumference. Apothecia moderate or somewhat large, plane, the 

 thalline margin at length crenulate. Cromb. Grevillea, xv. p. 78. 

 Pannelia aipolia /3. cercidia Ach. Lich. Univ. (1810) p. 478. Physcia 

 stellaris Cromb. Lich. Brit. p. 39 (excl. var. acrita) ; Leight. Lich. 

 Fl. p. 151, ed. 3, p. 140. Borrera stellar is Mudd, Man. p. 109. 

 Parmelia stellaris Tayl. in Mack. El. Hib. ii. p. 142. Lichen stellaris 

 Lightf. EL Scot. ii. p. 824 ; With. Arr. iv. p. 31 pro parte : Eng. 

 Bot. 1. 1697. Brit. Exs. : Leight. n. 6 ; Mudd, n. 79 ; Larb. Lich. 

 Hb. no. 161. 



A larger and coarser plant with somewhat of the aspect of P. pulveru- 

 lenta. It differs from the type in the colour of the rhizina? and in the 

 more contiguous, convex, and rugose lacinise, which are at times as if 

 imbricato-squamose in the centre. The apothecia are often very nume- 

 rous and crowded, sometimes nearly obliterating the thallus, when they 

 become flexuose and deformed. 



Hab. On the trunks of old trees, very rarely on calcareous walls, in 

 cultivated tracts from maritime to upland districts. Distr. General and 

 plentiful in most parts of Great Britain ; apparently rare in S. Ireland 

 and in the Channel Islands. B. M. : Island of Guernsey. Yarmouth, 

 Norfolk ; Walthamstow, Essex ; Edgeware, Middlesex ; near Elstree, 

 Herts; Reigate, Surrey ; Glynde, near Hastings, and Henfield, Sussex; 

 near Ryde, Isle of Wight ; Withiel and Penzance, Cornwall ; near Nails- 

 worth, Gloucestershire ; Madiugley Park, Cambridgeshire ; Twycross, 

 Leicestershire , Pixham, near Worcester, and North Malvern, W r orcester- 

 shire ; Harboro' Magna, Warwickshire ; Llandrindod, Radnorshire ; Aber- 

 dovey, Merionethshire ; Clungnnford and near Shrewsbury, Shropshire ; 

 near Ayton, Cleveland, Yorkshire ; Kendal and Windermere, Westmore- 

 land ; Alston, Cumberland ; near Hexham, Northumberland. Troquain, 

 New Galloway, Kirkcudbrightshire ; near Melrose, Roxburgh ; near 

 Edinburgh ; Tnverary Castle, Argyleshire ; Blair Drummond, near Stir- 

 ling ; Finlarig, Killin, Perthshire ; Camperdown, Forfarshire ; Cults, 

 near Aberdeen, and Castleton of Braemar, Aberdeenshire ; Fort William, 

 Inverness-shire ; Applecross, Ross-shire. Near Cork ; Dunkerron, co. 

 Kerry. 



