9S EPHEBACEI. [EPHEBE. 



1. E. pubescens Nyl. Syn. i. (1858) p. 90, t. ii. ff. 1, 17-20. 

 Thallus much branched, decumbent, slightly rugulose, somewhat 

 shining, olive-green or brownish-black, branches very slender, 

 capillary at the apices. Apothecia minute, pale ; spores simple or 

 J -septate, 0,011-0,016 mm. long, 0,003-0,004 mm. thick; hy- 

 menial gelatine either not tinged, or obsoletely violet-coloured (the 

 thecje tawny-yellow) with iodine. Mudd, Man. p. 34 ; Leigbt. Ann. 

 Mag. Nat. Hist. ser. 3, xvi. p. 10, t. 4. ff. 12-14 ; Lich. Fl. p. 12, 

 ed. 3, p. 10 ; Cromb. Lich. Brit. p. 1 ; Grevillea, v. p. 124. Cor- 

 nicularia pubescens Gray, Nat. Arr. i. p. 406. Lichen pubescens 

 Linn. Fl. Suec. (1745) n. 1126, pro parte; Eng. Bot. t. 2318. 

 Lichen exilis Lightf. Fl. Scot. ii. p. 894 ; With. Arr. ed. 3, iv. p. 47. 

 Lichen scabtr Huds. Fl. Angl. ed. 2, p. 562. Conferva atrovirens 

 Dillw. Br. Conf. p. 60, t. 25. Girardia atrovirens Gray, Nat. Arr. 

 i. p. 287. Scytonema atrovirens Ag. Hook. Fl. Scot. ii. p. 78. 

 Stiyonema atrovirens Sm. Eng. Fl. v. p. 363 ; Hass. Br. Fresbw. 

 Alg. p. 227, t. 66. f. 1. Probably several of these synonyms 

 relate to other species, the specimens seen being infertile. 



This grows in close, matted, irregular tufts, which often spread exten- 

 sively over the substratum. When young it is more or less suberect, 

 beconu'ng at length decumbent or prostrate. From Parmelia lanata, var. 

 reticulata, with which it was frequently confounded by the older authors, 

 it is externally distinguished when sterile by its softer, transversely rugose 

 thallus, and when fertile by the apothecia, which apparently are rare in 

 Britain. The spermogones, which are more frequent, are lateral, the 

 sterigmata usually simple, 0,005 mm. long. 0,001 mm. thick. 



Hub. On moist shady rocks, especially by streams, in upland and sub- 

 alpine situations. Distr. General and for the most part abundant where 

 it occurs in the mountainous tracts of Great Britain and Ireland. B. M. : 

 Near Ivy Bridge and Chagford, Devonshire ; Roughton, Cornwall ; Bar- 

 mouth and Dolgelly, Merionethshire ; Snowdon and Llanberis, Carnarvon- 

 shire ; Island of Anglesea ; Teesdale, Durham ; Mardale and near Kendal, 

 Westmoreland ; Ennerdale Lake, Cumberland. New Galloway, Kirkcud- 

 brightshire ; Appin and Head of Loch Awe, Argyleshire ; Glen Lochay 

 and Ben Lawers, Perthshire ; Achallater and Craig Guie, Braemar, Aber- 

 deenshire ; Glen Nevis, Inverness-shire ; Loch Shin, Sutherlandshire ; 

 Applecross, Ross-shire. Near Belfast, co. Antrim ; Dublin Mts. ; Coach- 

 ford, near Cork ; Gleugariff and Cromaglown, co. Kerry ; Kyleniore, 

 co. Galway. 



6. EPHEBEIA Nyl. Flora, 1875, p. 6 (cfr. Cromb. Grevillea, 

 v. p. 125). Thallus monoecious, cylindrical, intricate ; internally 

 as in the preceding genus. Apothecia solitary, paraphyses deter- 

 minate, slender, slightly incrassate at the apices ; spores constantly 

 simple ; hymenial gelatine wine-reddish with iodine. Spermogones 

 discrete, internally as in Ephebe. 



From Ephebe, with which it was formerly confounded, this has now 

 been separated, on account chiefly of the apothecia having distinct para- 

 physes and conspicuous anaphyses (ride Nyl. /. e.), as also constantly simple 

 spores. These characters seem sufficiently important to entitle it"to rank 

 as a distinct genus. 



