266 LICHENACEI. [STICTINA. 



This has been divided into two subgenera, viz. Euatictina and Purmu- 

 stivfina, the former characterized by lecanorine and the latter by pariue- 

 leine apothecia. These characters would justify their being regarded 

 as genera; but gouidia are protruded into the thalline margin of some 

 species of Sticta, though their apothecia can scarcely be regarded as truly 

 parmeleine (Xylander, Flora, l87o, p. 3G-"J). Of ParmostictiiKt, repre- 

 sented by the exotic Stictiiia hirsuta, we have no species in our islands. 



Subgenus EUSTICTIXA Cromb. Grevillea, xv. (1887) p. 7(3.— 

 Thallus beneath cyphellate or pseudo-cyphellate. Apothecia leca- 

 noroid. 



a. Pseudocupliellatcn. — Thallus with white or yellow pseudocyphellas. 



1. S. intricata Xyl. Var, /3. Thouarsii Nyl, Syn. i. (1860) 

 p. 335. — Thallus somewhat expanded, rigid, glabrous, sinuato-lobed, 

 lurid-brown or pale-brown ; beneath tomentose, blackish-brown, 

 paler at the circumference, with white pseudocyphelloe ; lobes short 

 and broad, sprinkled on the surface, and especially on the margins, 

 with simple, or verrucosa, or coralloid ca?sio-white soredia. Apo- 

 thecia not seen rightly developed. — Leight. Lich. PI. p. 114, cd. 3, 

 p. 108. — Sticta intricata var. Thouarsii Mudd, Man. p. 90. Stictina 

 TJiouarsii Cromb. Lich. Brit. p. 31. Sticta Thouarsii Del. Stict. 

 (1822) p. <J0, t. 8. f. 29. Sticta crocata /3. Tayl. in Mack. Fl. 

 Hib. ii. p. 151. — Brit. Exs.: Cromb. n. 33. 



Though appearing distinct,' the relation of this plant to ^S". intricata 

 (Del.) is so intimate as scarcely to warrant its separation. It is, 

 however, distinguished from the type by its short and broader lobes, as 

 also bv the soredia Avith which it is often copiously sprinkled. AN'ith us 

 young apothecia were once very sparingly met with, but no mature spores 

 have occurred. 



Hah. On mossy rocks and boulders, and the trunks of old trees in 

 maritime and mountainous districts. — Disfr. Local and rare in S. W. Eng- 

 land, N. AVales, the S. and W. Grampians, >Scotland, and S., W., and N. 

 Ireland. — B. M . : Near Hay Tor, Dartmoor, Devonshire ; near Dolgelly 

 and Barmouth, Merionethshire. New Galloway, Kirkcudbrightshire; 

 Inverary, head of Loch Awe, and Barcaldiue, Argyleshire ; Loch Tay, 

 Perthshire ; S. of Fort "William, luverness-shiie. Cromaglown and Kil- 

 laruey Woods, co. Kerry ; Glenarm, co. Antrim ; Fenagh, co. Carlow ; 

 Maam, Turk Mts., co. Galway. 



2. S. crocata Xyl. Syn. i. (1860) p. 338.— Thallus moderate, 

 somewhat shining or nearly opaque, often reticulato-lacunose, 

 hroadly lobed, dark olive-green or lurid-brown ; beneath brown or 

 blackish tomentose, with moderate rhizinaj and yellow pseudo- 

 cyphellaj ; lobes variously divided and crenate, scrobiculato-unequal, 

 citrino-sorediato. Apothecia scattered or nearly marginal, mode- 

 rate, blackish, the margin crenate, at length nearly excluded ; 

 spores 1-scptate, oblongo-fusiform, brown, 0,020-32 mm. long, 

 0,009-10 mm. thick.— Cromb. Lich. Brit. p. 31 ; Leight. Lich. Fl. 

 ]). 114, ed. 3, p. 108. — Sticta crocata Gray, Nat. Arr. i. p. 430; 

 Hook. Fl. Scot. ii. p. 58 ; Sm. Eng. Fl. v. p. 205 : Tayl. in Mack. 



