Tina has been divided into two suhgenera, viz. Lustictina and Parmo-
stwtma, the former characterized by leeanorine and the latter by parme-
leine apothecia. These characters would justify their being reo-arded
as genera; but gouidia are protruded in to 'th e thalline margin of some
species ot 6 f2cta, thougli tlieir apotliecia can scarcely be regarded as truly
parineleiiie (Nylander, Flora, 187Ô, p. 3Gd)- Oi: Fanmstictma, rep r^
seutod by the exotic iStictina hirsuta, we have no species in our islands.
Subgenus EUSTICTINU Cromb. GreviUea, xv. (1887) p. 76.—
Tluillus beneath cyphellate or pseudo-cypliellate. Apotbecia leoanoroid.
a. Psniclocyphellatce.— Thahns with white or yollow pseudooyphclloe.
U S . Uitricata Kyi. Var. ¡3. Thouarsii Kyi. Syn. i. (1860)
p. 3 3 5 .—Thallus somowhat expanded, rigid, glabrous, sinuato-lobed,
lurid-brown or p a le-brown; beneath tomentose, blackish-brown,
paler at th e oiroumferouoo, with white pseudocyphollæ ; lobes short
aiul broad, sprinkled on tho surface, and especially on the margins,
w ith simple, or verruoose, or coralloid cæsio-whito soredia. Apo?
thecia uot seen rightly develoiiod.—Leight. Lioh. PL p. 114, cd. 3,
p. 1Ü8.—Gifcitt intricata var. Thouarsii Aludd, Alan. p. 90. Ni-frfina
Thouarsii Cromb. Lioh. Brit. p. 31. Sticta Thouarsii Del. Stict.
(1822) p. 90, t. 8. f. 29. Sticta crocata ¡3. Tayl. in Alack. PI.
Hib. ii. p. 151.—B rit. E x s .: Cromb. u. 33.
Though appearing distinct, the relation of this plant to S. intricata
(Del.) is so intimate as scarcely to warrant its separation. I t is
however distinguished from the type by its short and broader lobes, as
also by the soredia with which it is often copiously sprinkled. AVith us
youug apothecia were ouce very sparingly met witli, hut no mature spores
have occurred. ^
Hab. Ou mossy rocks and boulders, and the trunks of old trees iu
maritime and luoimtamous distriets.—Distr. Local and rare in S.W. England,
N. AVales, the S. and W. Grampians, Scotland, and S., W., and N.
Ireland.—B. AJ.: Near Hay Tor, Dartmoor, Devonshire ; near DoDellv
and Barmouth, Alerionethshire, New Gallowav, I-Grkcudbrightshire •
Iiiverary, head of Loch Awe, and Barcaldine, Argyleshire ; Loch Tav’,
I erthslure ; S. of Tort AVilliam, luverness-shii e. Cromaglown aud Kil-
laruey Woods, co. Kerry ; Glenarm, co. Antrim ; Fenagh, oo. Carlow ;
Alaam, Turk Alts., co. Galway.
2. S. crocata Nyl. Syn. i. (I8 6 0 ) p. 338.—Thallus moderate,
somewhat shining or nearly opaque, often retioulato-lacunose,
broadly lobed, dark olive-green or lurid-brown ; beneath brown or
blackish tomentose, with moderate rhizinæ and yellow pseudo-
cyphellæ ; lobes variously divided and crenate, sorobioulato-iinequal,
oitrino-sorediato. Apotheoia scattered or nearly marginal, moderate,
blackish, th e margin crenate, a t length nearly excluded ;
spores 1-septate, oblongo-fusiform, brown, 0 ,0 2 0 -3 2 mm lono-’
0 ,0 0 9 -1 0 mm. thick.—Cromb. Lich. Brit. p. 31 ; Leight. Lioh. PL
p. 114, ed. 3, p. 108.— Sticta crocata Gray, Nat. Arr. i. p. 430 •
Hook. Fl. Scot. ii. p. 68 ; Sm. Fug. Fl. v. p. 205 ; Tayl. in Alack!
Fl. Hib. ii. p. 151 ; Aludd, Alan. p. 89. Lichen crocatus Linn. Alant.
(1771) p. 3 1 0 ; Dicks. Cr3'pt. fasc. ii. p. 2 2 ; With. Arr. ed. 3, iv.
p. 52 ; Eng. Bot. t. 2 1 1 0 .—Brit. Exs. : Cromb. n. 34 ; Dicks. H o rt.
Sio. 11. 24.
The plant is sprinkled with scattered, citrine soredia, situated on the
reticulations and on the margins, which contrast with its otherwise
darkish colour. The medullar}' layer is either white or white-citrine,
lu this conutry neither apothecia nor spermogones occur.
Hab. ximong mosses ou trees aud rocks in moist shady places, generally
ravines, in suhalpine tracts.—Histr. Extremelv local in S.W. England
and S. Scotland, more frequent in the \VL liighlands ; scarce in S.W.
and N. Irelaud.—B. AI. : Walkham River and near Vixen Tor, Dartmoor,
Devonshire; Cam Galva, uear Benzance, Cornwall. Dalmahoy
hill, near Edinburgh ; Inverary, Glen Falloch, aud head of Loch Awe,
Argyleshire ; ravine at foot of Ben Alore, and Aberfeldy, Perthshire ;
Glen Alorriston, Inverness-shire. Pigeon Island in the river Kenmare,
CO. Kerry ; Cushendall, co. Antrim.
b. Oygfliellatoe.— Thallus w ith thelotremoid or urceolate cyphoUæ.
3. S. fuliginosa Nyl. Syn. i. (1860) p. 347.—Thallus moderate
or small, monophyUous, somewhat rigid, smoothish or unequal,
nearly opaque, roundly lobed, cervine or greyish-brown ; beneath
tomentose, pale-brown, with whitish or pale cyphellæ ; lobes generally
broad and rounded, sprinkled with small brownish-black or
black, coralloid isidia. Apotheoia small, scattered, plane or slightly
convex, roddish-brown, th e margin a t first piloso-ciliate ; spores
1 - 3-septate, fusiform, colourless, 0,0 2 7 -4 0 mm. long, 0 ,0 0 7 -8 mm.
th ic k .—Cromb. Lich. Brit. p. 3 0 ; Loight. Lioh. F l. p. 116, ed. 3,
p. 109.—Sticta fuliginosa Gray, Nat. Arr. i. p. 430 ; Hook. Fl.
Soot. ii. p. 59 ; Sm. Eng. Fl. v. p. 206 ; Tayl. in Alack. Fl. Hib. ii.
]). 1 5 2 ; Aludd, Alan. p. 88. Liohen fuliginosus Dicks. Crypt, fasc.
i. (1785) p. 13 ; AVith. Arr. ed. 3, iv. p. 70 ; Eng. Bot. t. 1103.
lAchenoides fuliqinoswm et pulverulentum, scutellis rubiginosis Dill.
AIusc. 108, t. 26. f. 1 0 0 a .—Dn'i. E x s .: Leight. n. 1 4 2 ; Larb.
Cæsar. n. 61 ; Cromh. n. 133.
The thaUus, which in the larger states expands from a centre, is with
us generally smoothish, seldom rugose. I t is often covered with the
blackish efÍlore.scent isidia, hy which at once it may be distinguished
from the allied species. The apothecia, which are rare in Great Britain,
are at length siniewhat biatorine.
Hab. On mossy trunks of old trees and on rocks in moist shady places,
especially by waterfalls, in upland districts.—Distr. General and not uncommon,
though almost confined to the W’estern part of Great Britain ;
apparently rare in W. Ireland aud the Channel Islands.—B. AI. : La
Coupe, Island of Jersey; Jerhourg, Island of Guernsey. Lydd, Kent;
Isle of Wight ; AValkhampton and Ivy Bridge, uear Lustleigh and Alore-
ton, between Chudleigh aud Ashburton, and at Beckey Falls, S. Devon ;
i: