PHYSCIA. | PHYSCIEL. 317 
columnaris Tayl. in Fl. Hib. ii. p. 144, is a more granulose state.— 
Brit. Hxs.: Leight. nu. 324. : 
Easily recognized by the thallus being often almost entirely granulose 
or leprose, with the laciniz visible only at or towards the circumference. 
With us it is but seldom and sparingly seen with apothecia. The sper- 
mogones apparently do not occur in Britain. . 
Hab. On the trunks of trees, often in orchards, and on tiled roofs in 
maritime and lowland districts ——Distr. Somewhat local and scarce in 
8. and Central England, N. Wales, S. Ireland, and the Channel Islands ; 
not seen from Scotland.—B. M.: St. Martin’s, Island of Jersey ; Island of 
Guernsey. Epping Forest, Essex; near Maidstone and Tunbridge Wells, 
Kent; near Lewes, between Henfield and Brighton, and Hurstpierpoint, 
Sussex; near Southampton, Hants; Ryde, Isle of Wight; near Plymouth, 
Devonshire ; Penzance, Cornwall; West Haddon, Northamptonshire ; 
near Barmouth, Merionethshire. Tervoe, co. Limerick; Carrigalim, near 
Cork. 
Form elegans Nyl. ew Leight. Lich. Fl. ed. 3 (1879) p. 189.— 
Thallus glaucous-white ; lacinia finely isidioso-fimbriate at the mar- 
gins. Apothecia not seen.—Brit. Hws.: Larb. Lich. Hb. n. 88. 
The peculiar fimbriate margins of the lacinis, which are not leproso- 
ranulose, render this a somewhat distinct form. It does not occur 
ertile. 
Hab. On rocks in a maritime district.—Dzéstr. Found only very 
sparingly in N.W. Ireland.—B. M.: Kylemore Lake, co. Galway. 
20. P. cesia Nyl. Act. Soc. Linn. Bord. sér. 3, i. (1856) p. 308. 
-Thallus orbicular, closely adnate, stellate, multifido-laciniate, 
yesio-white or greyish-white, sprinkled with cesious subglobose 
soredia; beneath pale and sparingly fibrillose ; lacinise narrow, con- 
vex, contiguous, slightly dilated at the apices (Kf yellow, CaCl_). 
Apothecia sessile, small, concave or plane, black, naked or pruinose, 
the thalline margin thickish, entire or crenulate; spores oblong, 
0,016-23 mm. long, 0,009-13 mm. thick.—Cromb. Lich. Brit. p. 39. 
—Physcia stellaris var. cesia Leight. Lich. Fl. p. 152, ed. 3, p. 141. 
Borrera caesia Mudd, Man. p. 107. Squamaria cesia Sm. Eng. FI. 
v. p. 196. Parmelia cesia Gray, Nat. Arr. i. p. 443; Tayl. in Mack. 
Fl. Hib. ii. p. 147. Lichen ceesius Hoffm. Enum. (1784) p. 65, 
t. 12. £1; Eng. Bot. t. 1052. Lrchen Psora Dicks. Crypt. fase. iii. 
p. 17; With. Arr. ed. 3, iv. p. 26. Lichenoides cinereum, segmentis 
argutis stellatis, scutellis nigris Dill. Musc. 176, t. 24. £.'70 c.—Brit. 
Exs.: Leight. n. 323.- 
_ Distinguished from its more immediate allies by the pulvinate ceesious 
soredia, which are scattered regularly over the thallus and rarely become 
confluent. The apothecia are chiefly central and not of frequent occur- 
rence. 
Hab. On walls, roofs, and boulders in lowland and upland districts 
Distr. General though not’ common in England; much rarer in Scot- 
