Opegretpha .] L I c H E N J: s . 14 5 



5. O. dtra, Pers. {black Opegretpha); crust very thin mem- 

 branous smooth whitish, apothecia sessile variously formed the 

 smaller ones globose or oblong- the larger very long narrow- 

 terete subrugulose flexuose coal-black simple or divided. Pers. 

 in list. Ann. fasc. 7. p. 30. t. 1. f. 2. C. c — 0. denigrata, Ach. 

 Meth. — E. Bot. t. 1753. — 0. stenocarpa, Ach. Syn. p. 75, and 

 O. hapalea, p. 79 O. astroidea? E. Bot. t. 1347, {not Ach.) 



— O. ni?nbosa, E. Bot. t. 2346 ? {not Ach.) 



On the smooth bark of trees. — " Perhaps O. astroidea, E. Bot. t. 1347, 

 is a state of this, and distinct from Artlwnia astroidea, Ach. Even this 

 last is much like some young specimens of O. atra." 



6. O. vidgdta, Ach. {commo?i Opegrapha); crust cartila- 

 gineo-membranaceous broken up into little scales somewhat 

 even greenish- white, apothecia sessile variously formed the 

 longer ones somewhat terete wavy and shining with a very 

 narrow disk. Ach. Syn. p. 73. E. Bot. #. 1811 ? 



In the clefts and hollows of the bark of trees. — " The more exposed 

 lirellac and the less considerable crust distinguish this from O. rufescens ; 

 and the less expanding disk (essentially?) from (). varia. I am in 

 doubt whether O. rimalis, Ach. should be referred hither, or to 0. varia" 



7. O. betulina, Pers.? {Birch-bark Opegraphci); " crust very 

 thin dilated white bordered with black, apothecia mostly simple 

 prominent linear with an extremely narrow disk." Sm. — Pers. in 

 Vst. Ann. fasc. 7. p. SI. t. 3. /. 5. A. a.? E. Bot. t. 228} . 



— Graphis betidigna, Ach. Syn. p. 83? 



On the smooth hark of the common Birch. — " I am not sure that this 

 E. Bot. Lichen is the species of foreign authors, nor that it is distinct from 

 0. varia" These doubts arc sufficiently confirmed, I should think, as far 

 as Acharius is concerned, by his comparing this species with O. scripta, 

 of which he considers it a variety. 



8. O. vdria, Pers. (variable Opegrapha); crust thin powdery 

 white dispersed, apothecia sessile prominent scattered roundish 

 and oval or oblong wavv. the disk plant' at Length eonvexo- 



hemisphssrica] Bomewhat tuberculose, the border Bubevanesceot, 



Pers. in f'sf.Aiui. (use. 7. p. 30. — O. lichenoides, Pers, I.e. 

 p. 30. /. 2. / 4. a.'b.— (). notha, E. lint. t. 1890. Ach. Syn. 



with ears. ( excJL var. y. ) — (). diaphoro, E. lint. f. 2280. — O, tri- 

 diiis. u., O. fiilnlla. nnd O. rinihosa / Ach. Syn. 



On the bark of trees. — "The I'. B<>t. nimbosa I cannot refer t«> any 

 thing, specimens from Mr. Turner, with this name, are, I think, 0. tttn 



in a spoiled state." 



<). o. siiiiitdis. Or ('and. (stone OpeQrapha)} crust tarta- 

 reous pulverulent white often wanting, apothecia sessile slightly 

 prominent minute roundish-oblong or Linear very short often 

 confluent into -mall roundish -pet-, dish oOneave, the margins 

 flexuose ami at Length obliterated." DMs. — De Cam/. El. 



Ir. r. 2. />. 312. Schur. Ijeh. 11,1c. p. 49. ft. 94.- 0. euleuna. 



/•:. lint. t. L790«— 0. P er s oo mi, /.'. Bot. t 8845. — O. wxicoh, 



i. 



