370 CYCLOCARPINEX [PERTUSARIA 
variable in size, 80-150 p long, 50-82 pw thick (or smaller).— 
Cromb. in Grevillea xii. p. 59 & Monogr. i. p. 500; Leight. Lich. 
Fl. p. 238; ed. 3, p. 228 pro parte. P. syncarpa Mudd Man. 
p. 273 (1861) (incl. var. dealbata). Lichen dealbatus Ach. Lich. 
Suec. Prodr. p. 29 (1798). Variolaria dealbata DC. Fl. Fr. ii. 
p- 325 (1805); Engl. Bot. t. 2519. V. corallina Ach. Lich. 
Univ. p. 319 (1810); S. F. Gray Nat. Arr. i. p. 492; Tayl. in 
Mackay Fl. Hib. ii. p. 113. V. chlorothecia Tayl. tom. cit. p. 114 
(1836). Isidiwm paradoxum Turn. & Borr. ex Hook. in Sm. Engl. 
FI, v. p. 231 (1833) & Lich. Brit. p. 97. / 
Exsicc. Johns. n. 328 ; Leight. n. 320 ; Mudd n. 261. 
Distinguished by the generally papillate thallus and the scattered 
pustular verruce, which are frequently several-aggregate. The 
chemical reaction is very pronounced, and frequently the yellow 
colour changes to orange or red. The thallus is occasionally the host 
of Sclerococcum spherale Fr. 
Hab. On rocks, boulders and walls in maritime and mountainous 
regions.— Distr. Fairly common throughout the British Isles.—B. M. 
Sark; St. Austell, Cornwall; Dartmoor Tors, Devon; Barmouth, 
Aberdovey and Cwm Bychan, Merioneth; Nant Gwynant, Carnarvon- 
shire; Anglesea; Oswestry and Caer Caradoc, Shropshire; Kildale 
Moor, Cleveland, Yorkshire ; Teesdale, Durham; Cumberland ; Ochill 
Hills, near Stirling; Lismore and Ben Cruachan, Argyll; The 
Trossachs, Crianlarich, Ben Lawers, Craig Calliach and Ben Vrackie, 
Perthshire; Sidlaw Hills and Clova, Forfarshire ; Glen Callater and 
Morrone, Braemar, Aberdeenshire; Dunkerron and Finnehy River, 
Kerry ; Dawros River, Connemara, Galway. 
Form corallina Cromb. Monogr. i. p. 501 (1894).—Thallus 
more densely papillate than in the species, with the papillz more ~ 
elongate, simple or branched.—Var. corallina Cromb. in Grevillea 
xii. p. 59 (1883). P. syncarpa var. corallina Mudd Man. p. 273 
(1861). Lichen corallinus L. Mant. p. 131 (1767); Lighté. Fl. 
Scot. ii. p. 808 ; Huds. Fl. Angl. ed. 2, p. 526; With. Arr. ed. 3, 
iv. p. 16; Engl. Bot. t. 1541. Isidium corallinum Ach. Meth. 
Lich. p. 138 (1803) ; 8. F. Gray Nat. Arr. i. p. 412 ; Hook. FI. 
Scot. ii. p. 669 & in Sm. Engl. Fl. v. p. 231; Grev. Fl. Edin. 
p. 346; Turn. & Borr. Lich. Brit. p. 100. 
Differing from the species in the more definitely branched coralloid 
papille, though connected with it by intermediate states. In our 
county, and in France, it is recorded as always sterile, but Zahl- 
bruckner has issued a specimen from Saxony (Krypt. exs. n. 256) 
which bears apothecia. 
Hab. On rocks in maritime and upland situations.—Distr. Local 
and rare in Great Britain and Ireland.—B. M. Maresfield Common, 
Sussex; Pontneddfychan, Brecknockshire; Barmouth, Merioneth ; 
Anglesea ; Malvern, Worcestershire; Ayton Moor, Cleveland, York- 
shire; Egglestone, Durham; Alston, Cumberland; Ben-y-gloe, 
Perthshire ; Sidlaw Hills and Baldovan Woods, Forfarshire; Oban, 
Argyll; The Dargle River, Wicklow. 
