230 IJCHKKACEI. [EVERJUA. 



Form retusa Ach. Lich. Univ. (1810) p. 443. ThalJus csespitoso- 

 erect, shortly laciniate ; laciniee crowded and retuso-emarginate at 

 the apices. Apothecia not seen. Cromb. Linn. Soc. Journ. Bot. 

 xvii. p. 569. Parmelia prunastri /3. retusa Ach. Meth. (1803) 

 p. 257. Lichenoides cornutum bronchiole molle, subtus incanum 

 Dill. Muse. 160, t. 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. 



Ha 1 ). On old pales, chiefly larch, in upland and sometimes in lowland 

 districts. Disti: Seen from only a few localities in 8. England, E. and 

 N. Scot'and. B. M. : Near Millhill, Middlesex. Park, near Aberdeen ; 

 Lairg, Sutherlandshire. 



Var. (3. stictocera Hook, in Sm. Eng. Fl. v. (1833) p. 224.-^ 

 Thallus decumbent, subpendulous or prostrate, subcornpressed, 

 greenish sulphur-coloured, concolorous on both surfaces ; laoinuti 

 somewhat narrow, attenuate at the apices, often with minute brown 

 or blackish tubercles. Apothecia very rare. Cromb. GreviJlea, xv. 

 p. 74 ; Mndd, Man. p. 62 ; Cromb. Lieh. Br. p. 25 ; Leight. Lich. Fl. 

 p. 01, ed. 3, p. 8 *. Lichen stictoeeros Sm. Eng. Bot. (1802) 1. 1353. 

 Evernia prunastri var. gracilis Cromb. Journ. Bot. 1872, p. 233 ; 

 Leight. Lich. Fl. ed. 3, p. 83. Lichen prunastri ft Huds. Fl. Angl. 

 ed. 2, p. 541 ; With. Arr. ed. 3, iv. p. 53 pro parte. Lichenoides 

 corniculatum candidum molle, see/mentis anyustis Dill. Muse. 15*, 

 t. 21. f. 54. 



Distinguished by the narrower (in corticole plants rather broader), 

 more cylindrical lacini*, and especially by being concolorons on both 

 surfaces. It approaches E. divaricate, which does not occur in our 

 Islands. The lacinise 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 iirs in mountainous districts. I>itr. 

 Local and scarce in the Channel Islands, S. England, and on the Gram- 

 pians, Scotland. B. M. : Quenvais, Island of Jersey. Lydd Beach, 

 Kent ; Exmouth Downs, S. Devon. Stronaclachan and Finlarig Woods, 

 Killin, Ben Lawers, Perthshire ; Deerhill Wood, Forfarshire. 



2. E. furfuracea Fr. Lich. Eur. (1831) p. 20. Thallus ascending, 

 pendulous, or prostrate, laciniose, fnrfuraceous, greyish or greyish- 

 green ; beneath subcanaliculate, black or csesio-black, with a few 

 rhizinoe at the base ; laeinue much and dichotomously branched, 

 lineari-attenuate, incurved at the margins (K +y ellowish ? (j a ci-^ 

 Apothecia subpedicellate, moderate or large, concave, badio-reddish, 

 the margin thin, inflexed ; spores 0,007-10 mm. long, 0,004-5 mm. 

 thick. Mudd. Mun. p. 71 ; Cromb. Licb. Brit. p. 24; Leight. Lich. 

 Fl. p. 90, ed. 3, p. $2.--Borrera furfuracea Gray, Nat. Arr. i. p. 435 ; 

 Hook. Fl. Scot. ii. p. 54 ; Sra. Eng. Fl. v. p. 223. Parmelia fur- 

 furacea, Tayl. in Ma:]? . Fl. Hib. ii. p. 144. Lichen furfuraceus Linn. 



