PELTIGERA | PELTIGERACEX 95 
inflexed ; spores usually 3-septate, 44-60 » long, 4-5 w thick.— 
Leight. Lich. Fl. p. 110; ed. 3, p. 104. P. polydactyla var. 
scutata Fr. Lich. Eur. p. 47 (1831) ; Cromb. Lich. Brit. p. 29. 
P. canina var. scutata Mudd Man. p. 83 (1861). Lichenoides 
subfuscum, peltis horizontalibus planis Dill. Hist, Muse. p. 205, 
t. 28, fig. 104 c (1741). Lichen scutatus Dicks. Pl. Crypt. fase. 
3, p. 18 (1793) (non Wulf.) ; With. Arr. ed. 3, iv. p. 71; Engl. 
Bot. t. 1834. Peltidea scutata Ach. Meth. Lich. p. 285 (1803) ; 
S. F. Gray Nat. Arr. i. p. 427; Hook. Fl. Scot. ii. p. 60 & in 
Sm. Engl. Fl. v. p. 215. 
Exsicc. Cromb. n, 44; Johns. n. 126; Leight. n. 262 pro parte. 
Somewhat similar to P. polydactyla var. collina in the form of 
the lobes, but characterized by the furfuraceous thallus and nearly 
always by the sorediate margins. 
Hab. Among mosses on the trunks of trees, rarely on turf-walls 
in wooded districts.—Dvzstr. Not frequent in 8.W. and N. England, 
in Wales and in Scotland, and in N.E. and S.W. Ireland.—B. M. 
Tregawn, Cornwall; near Plymouth, Becky Fall, Elburton, Kings- 
bridge, Ivy Bridge, South Brent and near Harberton, Devon; 
Shanklin, I. of Wight; Up Park and near Hastings, Sussex; near 
Oswestry, Shropshire; near Edwinsford, Caermarthenshire; Hafod, 
Cardiganshire; Dolgelly and Llyn Bodlyn, Mericneth; Hoggarts 
Wood, Cleveland, Yorkshire ; Ambleside, Westmoreland ; Lamplugh 
and Keswick, Cumberland; New Galloway, Kirkcudbrightshire; 
Collinton Woods, near Edinburgh ; Inverary and Barcaldine, Argyll; 
The Trossachs, Glen Lochay and Schiehallion, Perthshire ; near Fort 
William, Invernessshire; Glenferness, Nairnshire; Killarney, Kerry ; 
near Belfast, Antrim. 
6. P. scabrosa Th. Fr. Lich. Arct. p. 45 (1860).—Thallus 
moderate in size, subcoriaceous, finely and minutely areolate- 
seabrid, roundly lobed, pale-brown or greyish, beneath whitish, 
subreticulate with nearly confluent nerves, pale towards the 
periphery, blackish towards the centre. Apothecia moderate 
in size, roundish, at length revolute, brownish-red or dark-brown, 
the margin subcrenulate ; spores 3- or more- septate, 68-80 pu long, 
or longer, 4-5 thick.—Cromb. in Journ. Bot. xxiii. p. 195 
(1885). 
Allied to P. rufescens but differs in the scabrid thallus and in the 
long narrow spores. There is no specimen in the British herbarium. 
Hab. On turf-covered walls between Corriemulzie and Inverey, 
Braemar, Aberdeenshire. 
Thallus naked, shining above. 
7. P. polydactyla Hoffm. Deutschl. Fl. ii. p. 106 (1795).— 
Thallus thinnish, smooth and shining, frequently digitate-lobed 
and ascending at the margins, especially when fertile, glaucous- 
green when moist, brownish-grey or tawuy-brown when dry, 
covered below with a brown tomentum or reticulate with white 
