230 LICHEN ACEI, [EVERNIA. 
Form retusa Ach. Lich, Univ. (1810) p. 443.—Thallus caespitoso- 
erect, shortly laciniate; laciniz crowded and retuso-emarginate at 
the apices. Apothecia not seen.—Cromb. Linn. Soc. Journ. Bot. 
xvii. p. 569.—Parmelia prunastri B. retusa Ach. Meth. (1803) 
p- 257. Lichenordes cornutum bronchiale molle, subtus incanum 
Dill, Muse. 160, ¢. 21. f, 55. 
Grows in dense tufts } to 1 in. in height, and often spreads extensively. 
It occurs only sterile, and is more or less sorediiferous. 
Hab. On old pales, chiefly larch, in upland and sometimes in lowland 
districts.— Dist. Seen from only a few localities in 8. England, EK. and 
N. Scot'and.—B. M.: Near Mitlhill, Middlesex. Park, near Aberdeen ; 
Lairg, Sutherlandshire. 
Var. 2. stictocera Hook. in Sm. Eng. Fl. v. (1283) p. 224.—- 
Thallus decumbent, subpendulous or prostrate, subcompressed, 
greenish sulphur-coloured, concolorous on both surfaces; lacinize 
somewhat narrow, attenuate at the apices, often with minute brown 
or blackish tubercles, Apothecia very rare.—Cromb. Grevillea, xv. 
p. 74; Mudd, Man. p.62; Cromb. Lich. Br. p. 25; Leight. Lich. Fl. 
p- 91, ed. 3, p. 8%.— Lichen stictoceros Sm. Eng. Bot. (1802) t. 1353. 
Evernia prunastri var. gracilis Cromb. Journ. Bot. 1872, p. 233; 
Leight. Lich. Fl. ed. 3, p. 83. Lichen prunastrt 3 Huds. Fl. Angl. 
ed. 2, p. 541; With. Arr. ed. 3, iv. p. 53 pro parte. Lichenoedes 
corniculatum candidum molle, segmentis angustis Dill. Muse. 159, 
t. 21. f. 54. 
Distinguished by the narrower (in corticole plants rather broader), 
more cylindrical laciniw, and especially by being concolorous on both 
surfaces. It approaches E£. divaricata, which does not occur in our 
Islands. The lacinie occasionally put forth transverse lacinioli, are but 
sparingly sorediate, and sprinkled, chiefly at the apices, with peculiar 
foreign (algoid?) tubercles (not true cephalodia). The apothecia are 
extremely rare, and are seen only on corticole specimens. 
Hub. On bare sandy soil, and on heather in sandy soil in maritime 
tracts, rarely on the trunks of aged firs in mountainous districts.—Dirstr. 
Local and scarce in the Channel Islands, 8. England, and on the Gram- 
pes Scotland.—B. M.: Quenvais, Island of Jersey. Lydd Beach, 
ent; Exmouth Downs, S. Devon. Stronaclachan and Finlarig Woods, 
Killin, Ben Lawers, Perthshire ; Deerhill Wood, Forfarshire. 
2. E, furfuracea Fr. Lich. Eur. (1831) p. 26.—Thallus ascending, 
pendulous, or prostrute, laciniose, furfuraceous, greyish or greyish- 
green; beneath subcanaliculate, black or cesio-black, with a few 
rhizine at the base; lacinie much and dichotomously branched, 
lineari-attenuate, incurved at the margins cK Pyetoma, CaCl7). 
Apothecia subpedicellate, moderate or large, concave, badio-reddish, 
the margin thin, intlexed ; spores 0,007-10 mm. long, 0,004-5 mm. 
thick.—Mudd. Man. p.71; Cromb. Lich. Brit. p, 24; Leight. Lich, 
FI. p. 90, ed. 3, p. 82.-—Borrera furfuracea Gray, Nat. Arr.i. p. 435; 
Hook. Fl. Scot. ii. p. 54; Sm. Eng. Fl. v. p. 223. Parmelia fur- 
furacea, Tayl. in Mack, FI. Hib. it, p. L44. ° Lichen furfuraceus Linn, 
