Pi. cell. aph. 3. HOMOTHALAMEZ. 83. Mallot. 399 
IV. s3. MALLOTIUM. Acharius. Mallote. 
Thallus \eaflike ; lobes rounded, underneath woolly or 
with small fibres. 
1. Mallotium Saturninum. Saturnine mallote. 
Thallus leaflike, blackish green, beneath sea-green, ra- 
ther woolly; /obes oblong, rounded, wavey, not cut; apo- 
thecia lateral, raised, flat, red, edge not cut. 
Lichen Saturninus, Dickson Pl. Crypt. Bot. 2,21; Engl. Bot. 1980. 
Lichen myochrous, Erkh. Pl. Crypt. Dec. 29, 236. 
Lichen discolor, Achar.in Nov. Act. Stockh. 16, 16. 
Parmelia Saturnina, dchar. Meth. Lich. 221. 
Collema tomentosum, Hoffm. Fl. Germ. 99, 
Collema Saturninum, Achar. Lich. Univ. 644. 
Trunks of trees and rocks. 
2. Mallotium Burgessit. Burgess’ mallote. 
Thallus leaflike, slightly tiledwise, brownish sea-green, 
underneath grows spongy, villous; oles rounded, jagged, 
crenular, crisp; apothecia depressed, flattish, brown; edge 
crisp, leaflike. 
Lichen ornatus, Lin. Suppl. Pl. 
Lichen Burgessii, Lightf. Fl. Scot. 827. 
Parmelia Burgessii, dchar. Meth. Lich, 251. 
Collema Burgessii, Achar. Lich. Univ. 645. 
On trunks of trees. 
V. 84. LATHAGRIUM. Acharius. Lathagrium. 
Thallus leaflike ; lobes nearly membranaceous, weak, 
naked, blackish green. 
1. Lathagrium nigrescens. Blackish lathagrium. 
Thallus \eaflike, membranaceous, nearly one-leafed, or- 
bicular, depressed, radiately plaited, round-lobed, blackish 
green; apothecia central, crowded, at length convex, red- 
dish brown, edge not in the least cut. 
Lichenoides saxatile membranaceum gelatinosum, tenue nigrescens, 
Dillen in Rati Syn. 12, 53. 
Lichen nigrescens, Huds. Fl. Angl. 537. 
Lichen vespertilio, Lightf. Fl. Scot. 840, 
Lichen papyraceus, Wulf, in Jacq. Coll. 3, 154, 
Parmelia nigrescens, Achar. Meth. Lich. 227. 
Collema vespertilio, Hoffm. Fl, Germ. 98. 
Collema nigrescens, Achar. Lich. Univ. 646. 
On the trunks of trees, rocks, and stones. 
