322 CYCLOCARPINEE [LECANORA 
portnoidea & squamata Flot. in Uebers. Schles. Ges. Vat. Cult. 
1850, p. 128. Aspicilia gibbosa Koerb. Syst. Lich. Germ. p. 163 
(1855) ; Mudd Man. p. 162. 
Exsicc. Cromb. n. 167; Johns. n. 271; Larb. Lich. Hb. n. 
220; Leight. n. 175 pro parte. 
A very variable plant, hence the many different growth forms ; it 
is ‘‘fibrose’’ or fimbriate when growing on bare flints, with the 
thalline areole scattered over the dark radiating hypothallus. 
Occasionally these areole swell into rounded warts (L. tuberculosus), 
or they may. in moist conditions, become sorediate (L. aspersa). 
Specimens with crenulate apothecia have been classified as f. port- 
noidea. All or some of these different forms may occur on the same 
specimen. Spermogoues are frequent on young plants, with spermatia 
7-10 p» long, 1 » thick. 
Hab. On rocks and stones (chiefly flints) in maritime and hilly 
districts.—Dvzstr. Local, though plentiful in $5.W. and N. England, 
rare in Wales and Scotland.—B. M. Chesil Beach, Portland Island, 
Dorset; Lyndhurst Moor, Hants; Ryde, I. of Wight; Lewes, 
S$. Downs, St. Leonards, Beachy Head and West Dean, Sussex; Lydd 
Beach, Kent; Hereford Beacon, Malvern, Worcestershire ; Crossfaen, 
Monmouthshire; Cader Idris, Merioneth ; Caer Caradoc and Long- 
mynd, Shropshire; Bury St. Edmund’s, Suffolk; Cleveland, York- 
shire; Teesdale, Durham; Cumberland; Appin, Argyll. 
Var. zonata Wain. in Medd. Soc. Faun. & Fl. Fenn. vi. p. 168 
(1881).—Thallus thin, cracked-areolate, determinate and zonate 
at the circumference with concentric lines and limited by a black 
hypothalline margin. Apothecia as in the species.—Cromb. in 
Grevillea xix. p. 57 (1891) & Monogr. i. p. 471. Sagedia zonata 
Ach. in Vet. Akad. Handl. 1809, p. 165 & Lich. Univ. p. 329 
(1810). 
A well-marked variety, evidently very rare. Crombie 1. ec. has 
suggested that L. gibbosa var. squamata Th. Fr. Lich. Scand. p. 276 
(non Flot.) may probably be an early stage of this variety. 
Hab. On siliceous stones in maritime and upland situations.— 
Distr. Very rare in S.E. England.—B. M. Downs, Sussex; Lydd 
Beach, Kent. 
Subsp. depressa Nyl. in Not. Siillsk. Faun. & Fl. Fenn. nus. 
v. p. 137 (1866) (inel. £. obscurata).—Thallus thickish, cracked- 
areolate, dark-grey or blackish. Apothecia somewhat small, 
immersed and thinly margined, then emergent, plane and im- 
marginate ; paraphyses slender, moniliform-septate and dark-brown 
at the tips; spores ellipsoid, with a distinct epispore, 16-24 p 
long, 8-14 » thick; hymenial gelatine blue, the asci wine-red, 
with iodine.—Cromb. Lich. Brit. p. 55 & Monogr. i. p. 471; 
f. depressa Leight. Lich. Fl. p. 210 (1871) (excel. syn. Ach.) ; 
ed. 3, p. 194 (excl. syn. Ach.). 
Distinguished by the immersed immarginate apothecia. It has 
been given specific rank by Hue (Nouv. Arch. Mus. Paris 1910, p. 82) 
J 
