PERTUSARIA.] LECANO-LECIDEEI. 493 
2. P. dactylina Nyl. Act. Soc. Sc. Fenn. t. vii. (1863) p. 447 
(nota 1).—Thallus thin, unequal, papillato-dactyloid, white; pa- 
pill erect, thickish, simple or rarely divided (K+yellowish, then 
reddish, CaCl1—). Apothecia inclosed in the apices of the papilla, 
rarely lecanorine, sometimes sublecanorine, blackish, usually covered 
with a thalline operculum; spores 0,125-220 mm. long, 0,065- 
85 mm. thick.—Cromb. Lich. Brit. p. 60; Leight. Lich. Fl. p. 239, 
ed. 3, p. 230.—Lichen dactylinus Ach. Prodr. (1798) p. 89. Lichen 
oculatus Eng. Bot. t. 1833, also of the older British authors pro 
parte (vide sub Lecanora oculata). 
Subsimilar to Zecanora oculata, but differs in the thicker and usually 
larger papille. These are generally constipate and rarely once or twice 
divided. The reaction with K is not always very distinct (efr. Nyl. 
Lapp. Or. p. 141). In the British specimens, which are usually sterile, 
the apothecia are occasionally sublecanorine. 
Hab. On the bare ground and overspreading decayed mosses in alpine 
situations.—Dzstr. Local and scarce on the summits of a few of the 
higher Grampians, Scotland.—B. M.: Ben Lawers, Perthshire ; Morrone 
and Ben-naboord, Braemar, Aberdeenshire. 
3. P. Hutchinsie# Leight. Angio. Lich. (1851) p. 30, t. L1.f. 1— 
Thallus effuse, thin, minutely rugoso-unequal, whitish or cream- 
coloured (K—, CaCl—). Apothecia lecanoroid, in small or sub- 
moderate, crowded, difform verrucae ; the ostiola large, brownish- 
black, czsio-pruinose, depressed, lacerate at the margins; spores 
0,08-12 mm. long, 0,040-55 mm. thick.— Mudd, Man. p. 277; Cromb. 
Lich. Brit. p. 59 ; Leight. Lich. Fl. p. 248, ed. 3, p. 233.—Thelo- 
trema Hutchinsie Borr. Eng. Bot. Suppl. (1831) t. 2652; Turn. & 
Borr. Lich. Br. p. 178; Sm. Eng. Fl. v. p. 162; Tayl. in Mack. Fl. 
Hib. ii. p. 103. 
Externally somewhat resembles Lecanora verrucosa, with which it 
agrees in habitat, but the structure of the apothecia is very different. From 
Urceolaria scruposa subsp. bryophila, to which, as observed by Borrer, it is 
also subsimilar, it is at once distinguished by the reaction with CaCl. 
Its nearest ally in this genus seems to be P. panyrga (Ach.) Fr. fil. ; 
but from this it differs among other characters in the thallus not becoming 
papillate. It is apparently peculiar to Ireland. 
Hab. On the ground incrusting mosses and heaths in an upland situa- 
tion.— Distr. Extremely local and scarce in S.W. Ireland.—B. M.: Hills 
near Bantry, co. Cork. 
4. P. melanochlora Nyl. Flora, 1873, p. 70.—Thallus deter- 
minate, thickish, rugoso-verrucose, subrimose, densely papillose, 
greyish-white or greyish-fumose (K (CaCl) 1 yi jet, rose-coloured): 
papille short, thick, cylindrical, simple, sorediate at the apices. 
Apothecia minute, several (2-5) inclosed in the apices of the papilla ; 
spores 0,180-250 mm. long, 0,075-100 mm. thick.—Cromb. Gre- 
villea, xix. p. 59.—Jsidiwm melanochlorum DC. Fl. Fr. ii. (1805) 
p. 326. 
