28 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 

 1-septate, 0,011-0,016 mm. long, 0,0u3-0,004 mm. thick ; hy- 

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

 theca? tawnv-yellow) with iodine.^Mudd, Man. p. 34 ; Leigbt. Ann. 

 Mag. Xat. 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. 1 24.-^- Cor- 

 nicularia jmbescens Gray, Xat. Arr. i. p. 406. Lichen pubescens 

 Linn. Fl. Suec. (174o/n. 1120, pro parte; Eng. Bot. t. 2318. 

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

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

 Dillw. Br. Conf. p. GO, t. 25. Girardia atrovirens Gray, Xat. Arr. 

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

 Stifjonema atrovirens Sm. Eng. Fl. v. p. 363 ; Hass. Br. Freshw. 

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

 relate to other species, the specimens seen being infertile. 



This gi'ows in close, matted, in-egular tiifts, which often spread exten- 

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

 becoming at length decumbent or prostrate. From I'armelia lanata, var. 

 reticulata, \vith which it wa,> frequently confoimded by the older authors, 

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

 thallus, and when fertile by the apothecia, which appai'ently are rare in 

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

 sterigmata usually ,-imple, 0,005 mm. long. 0,C01 mm. thick. 



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

 alpiue situations. — Distr. General and for the most part abundant where 

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

 Near Ivv Bridge and Chagford, Devonshire ; Ruughton, Cornwall ; Bar- 

 mouth and Dolgelly, Meriouetlishire ; Snowdonand Llanberis, Carnarvon- 

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

 Westmoreland: Eunerdale Lake. Cumberland. Xew Galloway, Ivirkcud- 

 bright.>hire : Appin and Head of Loch Awe, Argyleshire ; Glen Lochay 

 and Ben Lawers, Perthshire ; AchaUater and Craig Ciuie, Braemar, Aber- 

 deenshire ; Glen Xevis, Invemess-shire ; Loch Shin, Sutherlandshire ; 

 Applecross, Ross-shire. Xear lielfast, co. Antrim ; Dublin Mts. ; Coach- 

 ford, near Cork ; Glengaritf and Cromaglown, co. Kerry ; Kylemore, 

 CO. Galwav. 



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

 V. p. 125). — Thallus monoecious, cylindrical, intricate ; internally 

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

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

 simple ; hymenial gelatine wine-reddish with iodine. Spermogones 

 discrete, internally as in Ephebe. 



From Ephehe, with wbirh it was formerly confounded, this has now 

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

 physes and conspicuous anaphyses ( vide Xyl. /. c), as also constantly simple 

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

 as a distinct genus. 



