LECANORA. | LECANO-LECIDEEI. 389 
moderate, often divided at the apices.—Carroll, Journ. Bot. 1865, 
p. 288; Cromb, Lich. Brit. p. 48; Leight. Lich. Fl. p. 226, ed. 3, 
p. 217.—Zeora nivalis Koerb. Sert. Sudet. (1853) p. 1. Lecanora 
fuscoluteolina Mudd, Man. p. 153. 
Externally resembles Z. fulvolutea Nyl., a Scandinavian plant not yet 
detected in Great Britain, but differs at once in the spores, which with 
K are seen to be thinly l-septate. The apothecia are usually numerous, 
crowded, and for the most part biatoroid. 
Hab. On decayed mosses upon rocks and boulders in alpine places.— 
Distr. Very sparingly on one or two of the 8S. Grampians, Scotland.— 
B. M.: Ben Lawers and Ben Cruachan, Perthshire. 
51. L. tetrasticha Nyl. Flora, 1874, p. 307.—Thallus subdeter- 
minate, deplanate, thin, areolato-rimose, vitelline or yellowish- 
white (K+crimson). Apothecia small, biatorine, at first concave, 
then plane, thinly margined, or at length subimmarginate, orange- 
ochraceous (K+ purplish); spores oblongo-ellipsoid, 4-locular or 
3-septate (the transverse loculi retracted), 0,014-18 mm. long, 
0,006-8 mm. thick.—Cromb. Journ. Bot. 1876, p. 360; Leight. 
Lich. Fl. ed. 3, p, 224. 
Subsimilar, as noted by Nylander J.c., to subsp. LZ. erythrella, but 
differing in the paler thallus and the different spores. It still more closely _ 
resembles ZL. ochracea, with which it is often confounded, but is widely 
separated by the spores, which ally it to LZ: Brebissonii (Fée), a South- 
American plant. The British specimens are well fertile. ‘ 
Hab. On calcareous rocks in maritime and upland situations.—Distr. 
Local in S.W., Central, and N. England, and the 8.W. Highlands of 
Scotland.—B. M.: Ilsham, Torquay, and near Plymouth, 8. Devon; 
Cunning Dale, Buxton, Derbyshire; near Bonsall, Derbyshire ; Malham 
Tarn, Yorkshire; Levens, Westmoreland, Island of Lismore, Argyle- 
shire. 
52. L. refellens Nyl. Flora, 1877, p. 458.—Thallus thin, con- 
tinuous, unequal, greyish, minutely greenish-sorediate (K—). 
Apothecia small, plane, pale-reddish ; the thalline margin thin, sub- 
pulverulent, at length excluded ; epithecium yellowish (K—) ; spores 
polari-bilocular, with a longitudinal tube, variable, 0,009-11 mm. 
long, 0,005-7 mm. thick; paraphyses thickish—Cromb. Grevillea, 
1878, p. 111; Leight. Lich. Fl. ed. 3, p. 213.—Brit. Evs.: Larb. 
Lich. Hb. n. 24. 
A singular species of this section, externally not unlike Z. Sambuci, 
distinguished at once from its allies by the absence of any reaction of the 
epithecium. Jt is a rather inconspicuous plant, the thallus being but 
sparingly visible in the few specimens seen. The apothecia are numerous, 
becoming at length subbiatorine. 
Hab. On the trunks of poplars in a, mountainous district.— Distr. Only 
very sparingly in N.W. Ireland—B, M.: Near Cleghan, Connemara, co, 
Galway. 
