PELIIGERA.J PELTIGEKEI. 291 



irregularly crcnulate ; spores attenuate-fusiform, thinly 3-7-septate, 

 0,060-81 mm. long, 0,004-5 mm. thick. Mudd, Man. p. 83; 

 Cromb. Lich. Brit. p. 29 ; Leight. Lich. Fl. p. 109, ed. 3, p. 103. 

 Peltidea poly dart yla Gray, Nat. AIT. i. p. 428 ; Hook. Fl. Scot. ii. 

 p. (51 ; Sm. Eng. Fl. v. p. 220 ; Tayl. in Fl. Hib. ii. p. 154. Lichen 

 poh/dactylon Neck. Meth. Muse. (1771) p. 85 ; With. Arr. ed. 3, 

 iv. p. 69. Lichen caninus y. polydactylon Lightf. Fl. Scot. ii. p. 846 ; 

 Huds. Fl. Angl. ed. 2, p. 547. Lichenoides cinereum polydactylon 

 Dill. Muse. 207, t. 28. f. 107. To a state of this belongs also the 

 following : Peltidea pdlueida Ach., Gray, Nat. Arr. i. p. 429. 

 Lichen caninus . Huds. Fl. Angl. ed. 2, p. 547. Lichenoides mem- 

 branaceum pellucidum, peltis diyitatis yeminatis Dill. Muse. 208, 

 t. 28. f. 108. Brit. Exs. : Cromb. n. 148; Bohl. nos. 56, 71. 



This approaches P. rufescens, but is distinguished by the numerously 

 lobed thallus with its glabrous and shining upper surface, and by the 

 form of the smaller apothecia. These are usually abundant, adnate or 

 elongate and attenuate lobes, and at length become revolute. Sometimes 

 the/ occur two together (gemmate) on each fertile lobe, in which state 

 it is represented in Dill. I. c. (Peltidea pellucida Ach.). On the margins 

 of the lobes pycnides occasionally occur, with stylospores obloug, oblongo- 

 fusiform or almost ovoid, 0,007-0,012 mm. long, 0.003-4 mm. thick. 



Hob, Among mosses and short grass in shady situations in maritime 

 and upland districts. Distr. General and usually plentiful in most parts 

 of Great Britain ; rare in Ireland and the Channel Islands. B. M. : 

 Island of Guernsey. Epping Forest, Essex ; High Rocks, Tunbridge 

 Wells, Kent ; Dartmoor and near Totnes, Devonshire ; near Penzance 

 and Withiel, Cornwall ; Milton, Oxfordshire ; Gogmagog Hills, Cam- 

 bridgeshire ; near Worcester and Malvern, Worcestershire ; near Oswestry, 

 Shropshire ; Aberdovey and near Dolgelly, Merionethshire ; Island of 

 Anglesea; Eglestone, Durham; Lamplufrh, Cumberland. New Gallo- 

 way, Kirkcudbrightshire ; Auchindenny Woods, near Edinburgh ; Bar- 

 caldiue, Argyleshire ;. Glen Lochay and Glen Fender, Perthshire ; Cor- 

 riemulzie, Braemar, Aberdeenshire; Lochaber, Iiiverness-shire ; near 

 Forres, Elgin; Applecross, Ross-shire. Cromaglown, Killarney, co. 

 Kerry ; Kylemore, co. Galway. 



Form 1. collina Nyl. Lich. Scand. (1861) p. 90. Thallus smaller, 

 the lobes narrower, crisp at the margins. Apothecia as in the type. 

 Croinb. Journ. Bot. 1876, p. 360 : Leight. Lich. Fl. ed. 3, p. 104. 

 Lichen collinus Ach. Prodi-. (1798) p. 162. 



Easily recognized by the lobes. The thallus is rather fragile when 

 dry, and the apothecia are not numerous. 



Hab. On decayed mosses on the ground and old walls in upland tracts. 

 Distr. Local and rare on the S. and N. Grampians, Scotland, and in W. 

 Ireland ; no doubt to be detected elsewhere. B. M. : Glen Lochay, 

 Perthshire ; Glen Cluny, Braemar, Aberdeenshire. Killarney, co. Kerry. 



Form 2. microcarpa Nyl. Syn. i. (1860) p. 327. Thallus small, 

 the i'(*-tile lobules short, narrow, subbifid. Apothecia minute. 

 Cromb. Grevillea, xv. p. 77. Peltidea polydactyla y. microcarpa 

 Ach. Lich. Univ. (1810) p. 520. 



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