PARMKLTA.] PARMKLIKI. 2").'} 



convex, crenato-inciscd and but slightly dilatod at the apices (K~ 

 CaCl~). Apothecia small or moderate, scattered, subconcolorous, 

 the margin entire or subentiro ; spores 0,009-12 mm. long, 0,005- 

 6 mm. thick. — Cromb. Grevillea, x. p. 25. — Pannelii olivacea vars. 

 jtroliva et dendritica (Pcrs.) Leight. Lich. Fl. p. 112, ed 3, ]), 115. 

 Parmelia olivacea y. prollxa Ach. Meth. (1803) p. 214. — Brit. Exs. : 

 Leight. n. 3()5. 



Generally regarded as a variety of P. olivacea, but separated bv the 

 form of the hicinire and by the smaller spores. TIio thalliis is usuallv 

 smooth, hut sometimes ru^ulose, as is also the margin of the apothecia. 

 The apothecia are rare in liritain, hut the spermogones are not unfrequent. 

 They are at length somewhat prominent, with spermatia scarcely 0,0U7 

 mm. long, and about 0,001 mm. thick. 



Hah. On rocks in maritime and upland districts. — Distr. Local and 

 scarce in W. England and Wales; here and there in Scotland and in 

 N.W. Ireland. — B. M. : Malvern Hills, Worcestershire; Caer Camdoc, 

 Shropshire; Llandegley Rocks, Radnorshire; Mo d-v-Golfa, Montgomerv- 

 shire ; Douprlas Head, Isle of Man. Xew GaUowav, Kirkcudbright- 

 shire; Island of Lismore, Argyleshire; Portlethen. Kincardineshire; Crai"- 

 Guie, Braemar, Aberdeenshire. Conuemara, co. Gahvay. 



Subsp. l.P. sorediata Cromb. Journ. Bot. 1SS2, p. 273. — Thallus 

 smaller, aduate, sprinkled towards the centre with whitish or 

 brownish-white, verrucoso-promineut soredia ; lacinias somewhat 

 plane (K~, CaCl~). Apothecia small; spores 0,010-12 mm. long, 

 (•,005-6 mm. thick. — Pannelia stygia b. sorediata Aeh. Lich. L'niv. 

 (ISlO)p. 471. 



Distinguished by the pulvioate soredia with which the thallus is more 

 or less sprinkled towards the centre or occasionally almost throughout. 

 It is of small size (scarcely more than 1 in.), fi-equently opaque, with the 

 lacinife contiguous. The apothecia, which are small and scattered, are 

 very rare in Britain as in other countries. 



Hah. On rocks in upland mountainous districts. — Distr. Very local and 

 rare in W. England and among the Central and N. Grampians', Scotland. 

 — B. M. : North Hill, ]Mahern, Worcestershire. Craig Tulloch, Blair 

 Athole, Perthshire ; Craig Guie, Braemar, Aberdeenshire. 



Subsp. 2. P. Delisei Xyl. Fbra, 1873, p. 67. — Thallus larger, pale- 

 olive, the laciniae broader at the circumference (K(CaCl)To ^ t , ). 



V V /^f reddish' 



Apothecia and spores as in P. prolixa. — Cromb. Journ. Bot. 1 873, 

 p. 133 ; Grevillea, x. p. 25. — Pm^nelia Delisei Leight. Lich. Fl. ed. 3, 

 p. 129. Parmelia olivacea var. Delisei Dub. Bot. Gall. (1829) 

 p. 602. Parmelia olivacea var. aquiloides Linds., Mudd, Man. p. 99. 

 — Lichen oUvaceus pro parte and Parmelia olivacea pro parte of the 

 older and some more recent British authors. — Brit. Exs. : Leight. 

 n. 291 pro parte; Larb. Lich. Hb. n. 328; Bohl. n. 109 pro parte. 



The characters of the thallus and the chemical reaction make this a 

 distinct subspecies. In old plants the apothecia become large, crowded, 

 and somewhat Hexuose. 



