PL cell. aph. 3. HQMOTHALAMEiE. SS.Mallot. 399 
IV. 83. MALLOTIUM. Acharius. Mallote . 
Thallus leaflike ; lobes rounded, underneath woolly or 
with small fibres. 
1. Mallotium Saiurninum. Saturnine mallote . 
Thallus leaflike, blackish green, beneath sea-green, ra- 
ther woolly ; lobes oblong, rounded, wavey, not cut ; apo - 
thecia lateral, raised, flat, red, edge not cut. 
Lichen Saturninus, Dickson Pl. Crypt. Bot. 2,21 ; Engl. Bot, 19S0. 
Lichen myochrous, Erhh. PI. Crypt. Dec. 29,236. 
Lichen discolor, Acliar. in Nov. Act. Stockh. 16, 16. 
Parmelia Saturnina, Achar. Meth. Lic/i. 221. 
Collema tomentosum, Hoffm. FI. Germ. 99. 
Collema Saiurninum, Achar. Lich. Univ. 644. 
Trunks of trees and rocks. 
2. Mallotium Burgessii . Burgess ’ mallote . 
Thallus leaflike, slightly tiledwise, brownish sea-green, 
underneath grows spongy, villous; lobes rounded, jagged, 
crenular, crisp ; apothecia depressed, flattish, brown ; edge 
crisp, leaflike. 
Lichen ornatus, Lin. Suppl. PI. 
Lichen Burgessii, Lightf. FI. Scot. 827. 
Parmelia Burgessii, Achar. 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 leaflike, 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 Raii Syn. 72, 53. 
Lichen nigrescens, Huds. Fl.Angl. 537. 
Lichen vespertilio, Lightf, FI. Scot. 840. 
Lichen papyraceus, Wulf.in Jacq. Coll. 3, 154. 
Parmelia nigrescens, Achar. Meth. Lich, 227. 
Collema vespertilio, Hoffm. FI. Germ. 98. 
Collema nigrescens, Achar. Lich. Univ. 646. 
On the trunks of trees, rocks, and stones. 
