426 101. Roccel. 4. CENOTHALAME/E. Pl.cell.aph. 
Coralloides corniculatum faseiculare tinctorium fuci teretis facie, Dil- 
len Muse. 120. 
Lichen Roccella, Lin. S.-P. 1622; Engl. Bot. 211. 
Parmelia Roccella, Achar. Meth . 274. 
Roccella tinctoria, Achar. Lich. Univ. 439. 
On rocks by the sea-side. 
Thallus used in dyeing, when moistened with urine or 
volatile alkali, to dye a beautiful but perishable purple, and 
to give a fine bloom to other colours. 
2. Roccella phycopsis . Tanglike rock-moss . 
Thallus cylindrical, compressed, rather angular, grey 
greenish, very much branched ; branches and twigs nearly 
even-topped ; apothecia scattered, centre hoary, flat, at last 
■naked, black; thalloid border slightly irregular, very small. 
Lichen fucoides, Dickson Crypt. Brit. 2, 22. 
Roccella phycopsis, Achar. Lich. 440. 
On rocks by the sea-side. 
3. Roccella fuciformis. Wracklike rockmoss . 
Thallus flat, grey, greenish, two-forked, jagged; jags 
narrow ; apothecia marginal. 
Lichenoides fucifonne tinctorium, corniculis longioribus et acutioribus, 
Dillen Muse. 1 68. 
Lichen fuciformis, Lin. S. P. 1614 ; Engl. Bot. 728, 
Parmelia fuciformis, Achar. Meth. 258. 
Rocpella fuciformis, Achcar. Lich. 440. 
On rocks by the sea. 
XII. 102. NEPHROMA. Acharius. Kidney^moss, 
Thallus leaflike, leatherlike, membranaceous, expanded, 
lobed; underneath free, naked or slightly villous; apothecia 
resupinate, formed above from the lobes of the thallus, 
produced, ascendin g; proligerous flake kidneyshape, adnate 
to the thallus on its under surface, coloured, flat; inside 
eellularly streaked ; thalloid edge bent inwards, outwardly 
close to the apothecia, inwardly more remote, rather raised. 
1. Nephroma resupinalum. Down-lying kidney-moss. 
Thallus chestnut colour, livid, rather pale, downy, gra- 
nular; fertile lobes short; flake of the apothecia red. 
Lichenoides saxatile fuscum, peltis in aversa foliorum superficie locatis, 
Jlaii Syn. 77, 91. 
Lichen resupinatns, Lin. S. N. 1615. 
Peltigera tomentosa, Hoffm. Germ. 103, 
Peltidea resupinata, Achar. Meth. 289. 
Nephroma resupinata, Achar. Lich. 522. 
On the ground among roots of trees and on hills* 
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