304 LICHENACEI. [PHYSCIA. 
0,035-63 mm. long, 0,018-25 mm. thick.—Cromb. Lich. Brit. p. 38 ; 
Leight. Lich. Fl. p. 149, ed. 3, p. 188.—Borrera leucomela Gray, 
Nat. Arr. i. p. 484; Sm. Eng. Fl. v. p. 223; Mudd, Man. p. 104. 
Lichen leucomelas Linn. Sp. Pl. ed. 3 (1764) p. 1613; Eng. Bot. 
t. 2548. Lichenoides angustifolium planum, erinibus nigris Dill. 
Muse. 156, t. 2. f. 50.—Brit. Evs.: Leight. n. 166; Larb. Cesar. 
n. 69; Cromb. n. 150. 
Closely allied to P. ciliaris, but well distinguished by the simpler 
whiter laciniz and by the constantly dentate-coronate margin of the 
apothecia, The marginal cilia, which are usually short in our specimens, 
are generally blackish or partly brownish, according to exposure. The 
apothecia do not occur in this country, and the spermogones, which are 
similar to those of the preceding, are but rarely present. 
Hab. On the ground among mosses and short grass, rarely on mossy 
trunks of trees, in maritime districts—Distv. Confined to the Channel 
Islands and 8. coasts of England and Ireland—B. M.: Quenvais and St. 
Owen’s Bay, Island of Jersey ; Islands of Sark and Alderney. St. Leonard’s 
Forest, Sussex; Babbicombe and Bolt Head, 8. Devon; The Lizard and 
Kynance Cove, Cornwall; Bryer and Trescoe Islands, Scilly. Ballycotton 
and Cape Clear Island, co. Cork. 
9. P. speciosa Nyl. Act. Soc. Linn. Bord. sér. 3, i. (1856) p. 307. 
—Thallus appressed, stellato-laciniate, cesio- or greyish-white, 
greenish-white when wet; beneath whitish, with whitish or sordid- 
whitish fibrillose rhizine ; lacinize narrow, multifid, plane subimbri- 
cate, with whitish or sordid marginal cilia, the apices dilated, obtuse, 
usually somewhat ascending and sorediiferous (K [yellow, CaCl_). 
Apothecia sessile, moderate, brown, the margin incurved, entire or at 
leugth crenulate; spores 8nz, oblong, 1-septate, colourless, 0,025- 
36 mm. long, 0,012-19 mm. thick.—Cromb. Lich. Brit. p. 38; 
Leight. Lich. Fl. p. 151, ed. 3, p. 188.—Borrera speciosa Mudd, Man. 
p- 107. Parmelia speciosa Gray, Nat. Arr. i. p. 442; Hook. Fl. Scot. 
i. p. 55; Sm. Eng. FL. v. p. 201; Tayl. in Mack. Fl. Hib. ii. p. 149 
pro parte. Lichen speciosus Wulf. in Jacq. Coll. iii. (1789) p. 119; 
Eng. Bot. t. 1979 (upper fig.). 
Muscicolous states, in which the thallus is more diffuse and the lacinise 
narrower and more discrete, have somewhat the appearance of P. leucu- 
mela, while corticolous and saxicolous states, in which they are closer and 
more imbricate, are somewhat similar to P. atpolia. With us it never 
occurs in a el condition, but only sorediiferous, as elsewhere in 
Europe. In the more imbricate states the marginal cilia are but very 
sparingly present or entirely absent ; and when growing in more exposed 
situations these, as well as the rhizine, become blackish. Specimens 
with the latter character are referred by Leighton (Lich. Fl. iii. p. 189) 
to var. hypoleuca (Ach.). The apothecia have not been detected in Great 
Britain; but the spermogones occasionally occur in 8. W. Iingland. 
Hab. On mosses, rocks, and trees, chiefly in maritime districts. Distr. 
Local and scarce in the Channel Islands, in 8. and W. England, the W. 
Highlands of Scotland, and in S.W. and N.E. Iveland.—B. M.: Rozel, 
Island of Jersey; Islands of Alderney and Guernsey. St. Leonard’s 
Forest, Sussex; Bolt Head, Devonshire; The Lizard, Kynance Cove 
