130 CYCLOCARPINEA! [ PARMELIA 
Very similar to the preceding, but distinguished by the reactions 
and by the form of the spermatia which are lageniform (broadly - 
clavate). The apothecia are rare. 
Hab. On the trunks of old trees, rarely on rocks in wouded 
maritime and upland regions.—Distr. Rather rare; the Channel 
Islands, S. and 8.W. England, N. Wales, and hilly regions of Scotland. 
—B. M. Rozel, Jersey ; "Holmen Tor, Cornwall: Dartmoor and Bick- 
leigh Vale, Devon; New Forest, Hants ; Dolzelly, Aberdovey and 
near Barmouth, Merioneth; New Galloway, Kirkeudbrightshire ; 
Appin, Argyll; Loch Katrine, Perthshire; Loch Linnhe, Inverness- 
shire. 
C. Rhizine abundant or scanty, up to edge of lobes (Hypotrachyna). 
a. Thallus whitish or grey-coloured. 
Tsidia and Soredia absent. 
15. P. tiliacea Ach. Meth. Lich. p. 215 (1805).—Thallus 
orbicular, rather thin, laciniate-lobed, appressed, smooth or 
partly wrinkled or subpruinose, pale greyish-glaucous, the lobes 
subimbricate, deeply divided and crenate, beneath brownish- 
black, rhizinose to the margin (K + ‘ewlsh” CaCl = ..,). 
Apothecia moderate in size, crowded when present, concave or 
nearly plane, brownish-red, the margin becoming crenulate ; 
spores oe. aie small, 7-11 » long, 5-7 p» thick.—S. F. Gray 
Nat. Arr. i a: 438 ; Hook. in Sm. Engl. Fl. v. p. 200; Mudd 
Man. p. 93, t 2, fig. 28 (excl. var. scortea); Cromb, Lich. Brit. 
p. 33 (excl. sabape scortea) ; Leight. Lich. Fl. p. 131 pro parte 
(incl. var. rugosula) ; ed. 3, p. 121 pro parte (incl. var. rugosula). 
Lichen tiliaceus Hoftm. Enum. Lich. p. 96, t. 16, fig. 2 (1784) ; 
Dicks. Pl. Crypt. fase. iii. p. 16; Sm. in Trans. Linn. Soe. i. 
p. 83 (1791) ; With. Arr. ed. 3, iv. p. 31.™ 
Eusice. Larb. Lich. Hb. n. 292, 
Distinguished by the more closely appressed thallus with narrowly 
sinuate and closely contiguous lobes, crenate at the margin and 
sometimes wrinkled and pruinose. The apothecia are chiefly central ; 
the spermogones are prominent and brownish with spermatia 7 « long, 
lu thick. 
Hab. On the trunks of trees, rarely on rocks in maritime and 
inland Rather rare in the Channel Islands, S. and 
N. iagiind, N. Wales bad W. Scotland, not yet recorded for Lreland. 
—B.M. Petit Port, Jersey; near Exeter, Ilsham, near Torquay, and 
Chagford, Devon ; Lymington, Hants; near kh yde, I. of Wight; Lewes, 
Wiston and St. Leonard’s Forest, Sussex; Esher and Dorking, Surrey ; 
near Barmouth and Harlech, Merioneth; Clapdale, Yorkshire; near 
Kendal, Westmoreland. 
Subsp. carporhizans Nyl. Syn. Lich. i. p. 384 (1860).—Thallus 
similar to that of the species. Apothecia occasionally perforated, 
the excipulum blackish and black-setulose.—Cromb., in Grevillea 
xy. p. 75 (1887). Parmelia carporhizans Tayl. in Hook. Journ. 
