PYCNOTHELIA. ] CLADONIEI. 125 
occasionally numerous and crowded. The apothecia in this country are 
extremely rare, at least in a rightly developed cordition. The spermo- 
gones, however, are frequent, with spermatia 0,010-13 mm. long, 0,0005 
mm, thick. 
Hab, On the ground in dry exposed places of upland and subalpine 
moorland districts——Distr. General, but nowhere common, in the hilly 
and mountainous tracts of Great Britain and Ireland.—B. M.: Mouse- 
hold Heath, Norwich, Norfolk ; Bournemouth, Hants; Dartmoor, Devon- 
shire; St. Breock, Cornwall; Llandrindod Hill, Radnorshire; Ayton, 
Cleveland, Yorkshire; Eglestone, Durham. New Galloway, Kirkcud- 
brightshire ; Appin, Argyleshire; Ben Lawers and Rannoch, Perthshire ; 
Bennaboord, Morrone (frt.), and above Loch Callater, Braemar, Aber- 
deenshire ; Ben Nevis, Inverness-shire ; Applecross, Ross-shire; near 
Lairg, Sutherlandshire. Doneraile Mts., co. Cork; Kilkee, co. Clare; 
Killarney, co. Kerry. 
Form molariformis, Cromb. Grevillea, xi. p. 111.—Podetia longer, 
thicker, divided towards the apices, the branches short, subpapillate, 
subfastigiate-— Var. molariforméis Nyl. in Cromb. Lich. Brit. (1870) 
p. 18.—Cladonia molartformis Hoffm. Deutsch. Fl. (1795) p. 117. 
A luxuriant and robust form, with the podetia crowded and branched, 
and the basal crust but little visible. Nylander observes (Lich. Scand. 
p- 50) that it occurs more frequently in Central than in Northern Europe; 
and this corresponds with its distribution in Great Britain. With us the 
apothecia do not occur, and the spermogones are less frequent than in 
the type. 
Hab. On the ground among rocks in upland situations.—Distr. Very 
local, though common where it oceurs, in 8. England.—B, M.: Ardingly 
Rocks, Sussex. 
2. P. apoda Nyl. Flora, 1865, p. 211 (note), 1878, p. 241.— 
Thallus thin, thinly granuloso-erustaceous,white or whitish ; podetia 
small, erect, ellipsoideo-vesiculose or subgranuliform (K+ yellow, 
CaCl—). Apothecia sessile, small, often aggregate, plane, immar- 
ginate or somewhat convex, rusty-red or red-ochraceous ; spores 
fusiformi-oblong, 0,007-0,010 mm. long, 0,004 mm, thick ; epithe- 
cium reddish-brown.—Cromb. Grevillea, vii. p. 97; Leight. Lich. 
Fl. ed. 3, p. 544. 
From the preceding well distinguished by the apothecia being sessile 
on the Teal thallu® The podetia, which are few, are seen only in an 
abortive condition. A singular character of the plant is that the spermo- 
gones usually occur inclosed in the hymenium, without any distinct con- 
ceptacle. The spermatia are slightly arcuate, 0,008-0,012 mm. long, 
0,0005 mm. thick. 
Hab. On the ground in a maritime district. Distr, Very local and rare, 
in N.W. Ireland (near Kylemore, co. Galway). 
