LEPTOGIUM. | COLLEMEI. U7 
land. New Galloway, Kirkcudbrightshire; Johnstone, Moffat, and Rae 
Hills, Dumfriesshire ; Inverary and Appin, Argyleshire; The Trosachs, 
Glen Lochay, and Glen Falloch, Perthshire; Lochaber, {nverness-shire. 
Eagle’s Nest, Cromaglown, Dinish, and Derrycuintry, Killarney, co. Kerry ; 
Connemara, co. Galway. 
PsEvDO-GENUS. 
17. DENDRISCOCAULON Nyl. Flora, 1885, p. 299.—Thallus 
fruticulose, much branched, the axis solid, branches covered towards 
the apices with minutely divided furfuraceous lacinie, containing 
gonimia, which are more or less scattered. Apothecia and spermo- 
gones unknown. 
This pseudo-genus, as indicated by Nylander (Flora, 1876, p, 578), is 
only a leprarioid condition of “ Leptogium,” so that we have both gonimic 
and gonidic leprarioid thalli. In internal structure the furfuraceous 
lacinize are somewhat like those of the subgenus Homodium. 
1. D. bolacinum Nyl. Flora, 1885, p. 299.—Thallus cespitose, 
erect, branches compressed, isabelline; lacinise crowded, leproso- 
pulvinate, dark greenish.—Cromb. Grevillea, xv. p. 13.—Homo- 
dium bolacinum Cromb. Journ. Linn. Soc., Bot. xvi. p. 228. Lepto- 
gium bolacinum, Cromb. Journ. Bot. 1876, p. 359. Collema atro- 
ceruleum ¢. bolacinum Scher. (non Ach.) Enum. 1850, p. 249. 
According to Nylander (Stiz. Lich. Hyperb. p. 6) this peculiar plant is 
identical with Cornicularia Umhauensis Auersw., Hedwigia, 1869, p. 113, 
and constitutes the glomeruli of Ricasolia glomulifera. It resembles 
Leptogium lopheum, and very rarely occurs growing independently. 
Hab. Among mosses on old trees, rarely on rocks, in upland tracts.— 
Distr. As an independent plant very local and scarce in the 8. Highlands 
of Scotland.—B. M.: Barcaldine, Argyleshire; near Taymouth, Perth- 
shire. 
18. COLLEMOPSIS Nyl. Flora, 1873, p. 17 (note), efr. Cromb. 
Journ. Bot. 1874, p. 3382.—Thallus crustaceous, thin, granulato- 
areolate, more or less loosely affixed to the substratum, glaucous- 
green within; gonimic granules submoniliform. Apothecia urceo- ' 
lato-innate, small, the margin usually tumid and connivent; spores 
Sne, ellipsoid, simple, colourless ; paraphyses usually simple, slender; 
hymenial gelatine bluish or wine-red with iodine ; spermogoncs with 
simplish sterigmata, and oblong minute spermatia. 
Nylander separated this genus from Pyrenopsis and placed it amongst 
the Collemei because of the texture and colour of the thallus and the sub- 
moniliform gonimia. It embraces various genera of authors, as Pyrenopsis 
Nyl. pro parte, Psorotichia Mass., Porocyphus Korb., &e. “Of these, Psoro- 
tichia, had it not been informal (for it should evidently have been written 
Tichospora), ought probably to have been preserved” (Nyl. zn dtt.). Some 
species very much resemble Pannularia, but ave distmguished by the 
absence of a hypothallus. Collemopsis evidently holds the same place 
among the Collemacei as Pannularia among the Lichenacet. 
