266 LICHENACEI. [STICTINA. 



This has been divided into two subgenera, viz. Eustictina and Parmo- 

 stictina, the former characterized by lecanorine and the latter by parme- 

 leine apothecia. These characters would justify their being regarded 

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

 species of Sticta, though their apoth'ecia can scarcely be regarded as truly 

 parmeleine (Nylander, Flora, 1875, p. 363). Of Parmostictina, repre- 

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



Subgenus EUSTICTINA Cromb. Grevillea, xv. (1887) p. 76. 

 Thallus beneath cyphellate or pseudo-cyphellate. Apothecia leca- 

 noroid. 



a. PseudocyphellatcE. Thallus with, white or yellow pseudocyphella3. 



3. S. intricata Nyl. 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 pseudocyphellao ; lobes short 

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

 with simple, or verrucose, or coralloid caesio-white soredia. Apo- 

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

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

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

 (1822) p. 90, t. 8. f. 29. Sticta crocata ft. 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 by the soredia with which it is often copiously sprinkled. With us 

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

 have occurred. 



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

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

 land, N. Wales, 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 Barcaldine, Argyleshire ; Loch Tay , 

 Perthshire ; S. of Fort William, Inverness-shire. Cromaglown and Kil- 

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

 Maam, Turk Mts., co. Galway. 



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

 somewhat shining or nearly opaque, often reticulato-lacunose, 

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

 blackish tomentose, with moderate rhizinse and yellow pseudo- 

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

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

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

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

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

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

 Hook. Fl. Scot. ii. p. 58 ; Sm. P]ng. Fl. v. p. 205 ; Tayl. in Mack. 



