NEPHROMIUM. | PELTIGERET. 285 
4. N. subtomentellum Nyl. ev Cromb. Journ. Bot. 1874, p. 147.— 
Thallus subcoriaceous, somewhat expanded, rotundato-lobed, opaque, 
rugulose, sinuato-lobed at the margins, dark lurid-brown; beneath 
rugulose, obsoletely tomentellose, brown (medulla white, K—). 
Apothecia moderate, dark-red, the receptacle coriaceo-rugulose or 
thinly areolato-granulose ; spores 0,020-24 mm. long, 0,006-7 mm. 
thick.—Nephromium leevigatum var. subtomentellum Nyl. Not. Siillsk. 
F. et Fl. Fenn, Forh. n. s. v. (1866) p.116; Leight. Lich. Fl. ed. 3, 
p- 99.— Brit. Hxs.: Cromb. n. 149. 
Distinguished by the rugulose thallus and receptacle, and by the obsolete 
tomentum of the under surface, which with the size of the spermatia show 
that it is a good species. The apothecia are numerous, occasionally rather 
large and crowded. The spermogones, which are more frequent than in 
any of the other British species, have the spermatia (ex Nyl. im itt.) 
0,0025-0,0030 mm. long, 0,0010 mm. thick. 
Hab, On the trunks of old ash trees in mountainous regions,— Distr. 
Local and scarce in N. Wales, and among the 8. Grampians, Scotland.— 
B.M.: Rhewgreidden, Merionethshire. Head of Loch Awe, Argyleshire ; 
Glen Lochay, Killin, Perthshire. 
5. N. lusitanicum Nyl. Flora, 1870, p.38.—Thallus suborbicular, 
rotundato-lobed, smooth and somewhat shining, crenate, crisp and 
undulate at the margins, livid-chestnut or chestnut-brown ; beneath 
glabrous, somewhat rugulose, pale (medulla yellow, K+ purplish). 
Apothecia small or moderate, reddish-brown, the receptacle crenato- 
laciniate, incurved, the back minutely depresso-areolate; spores 
0,020-24 mm. long, 0.006-7 mm. thick.—Leight. Ann. Mag. Nat. 
Hist. 1870, p.41; Lich. FL p. 106, ed. 3, p. 100.—Mephromium 
levigatum f. lusitanicum Cromb. Lich. Brit. p. 28. Nephroma lusi- 
tanicum Scher. Enum. (1850) p. 823. Lichen resupinatus Eng. Bot. 
t. 3805 ; var. 2, With. Arr. ed. 3, iv. p. 71.—Brit. Evs. : Mudd, n. 57; 
Dicks. Hort. Sic. n. 23; Leight. n. 107; Larb. Lich. Hb. n. 288. 
Similar to NM. levigatum, except in the colour of the medulla and the 
chemical reaction. These differences, however, are of sufficient importance 
to warrant our regarding it with Scherer as a distinct species. With us 
it is much more common than UN. levigatum, and is generally fertile. 
Hab. On the trunks of old trees, and on mossy rocks and boulders in 
maritime and upland wooded districts.—-Distr. General and common in 
S., W., and N. England, N. Wales, in 8. and Central Scotland, and in N, 
aud S.W. Iveland.—B. M.: Brechou and Guernsey, Channel Islands. 
Lydd, Kent; Lustleigh Cleeve and near Totnes, 8. Devon; near Res- 
pring, Launceston, Liskeard, Penzance, and St. Austell, Cornwall; Mal- 
vern, Worcestershire; Pentregaer near Oswestry, Shropshire ; Barmouth 
and Aberdovey, Merionethshire; Bettws-y-Coed, Carnarvon; Island of 
Anglesea; Cleveland, Yorkshire; Eglestone, Durham; Mardale, West- 
moreland : Keswick and Bassenthwaite Lake, Cumberland. New Gallo- 
way, Kirkcudbrightshire; near Moffat, Dumfriesshire; Dumbarton 
Castle, Dumbartonshire ; Barcaldine, Inverary, and head of Loch Awe, 
Argyvleshire ; Glen Lochay and Pass of Leny, Perthshire; Reeky Linn, 
Forfarshire ; Craig Coinnoch, Braemar, Aberdeenshire ; Cawdor ‘Woods, 
Nairn; Loch Linnhe, Fort George, and Falls of Foyers, Inverness-shire ; 
