266 LICHENACEL, [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 apothecia 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. Pseudocyphellate.—Thallus with white or yellow pseudocyphelle. 
1. S. intricata Nyl. Var. 6. 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 circumterence, with white pseudocyphelle; lobes short 
and broad, sprinkled on the surface, and especially on the margins, 
with simple, or verrucose, or coralloid casio-white soredia. Apo- 
thecia not seen rightly developed.—Leight. Lich. Fl. p. 114, ed. 3, 
p. 108.—Sticta wntricata var. Thouarsiti Mudd, Man. p. 90. Stictina 
Thouarsii Cromb. Lich. Brit. p. 31. Sticta Thouarsit Del. Stict. 
(1822) p. 90, t. 8. f. 29. Stieta crocata fB.'Tayl. in Mack. Fl. 
Hib. ii. p. 151.— Brit. Exs.: Cromb. n. 33. 
Though appearing distinct, the relation of this plant to 8. ¢ntricata 
(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 with, but no mature spores 
have occurred. 
Hab, On mossy rocks and boulders, and the trunks of old trees in 
maritime and mountainous districts.— Distr. Local and rare in 8. W. Eng- 
land, N. Wales, the S. and W. Grampians, Scotland, and §., W., and N. 
Ireland.—B. M.: Near Hay Tor, Dartmoor, Devonshire ; near Dolgelly 
and Barmouth, Merionethshire. New Galloway, Kirkeudbrightshire ; 
Inverary, head of Loch Awe, and Barcaldine, Argyleshire; Loch Tay, 
Perthshire; 8. 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 rhizine and yellow pseudo- 
cyphelle ; 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 l-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. Eng. Fl. v. p. 205; Tayl. in Mack. 
