336 IV. Lichenes, 2. discocymatii. 



ring. a Parmelia callopismatc ortum ducit ; quatenus 

 autem var. cc. dcndrophila alioquin cum (i. lithophila 

 cxacte congrua conveniat, mihi plane latet.) 



845. P. thcjotea lf r ., hlastemate crustaceo verru- 

 coso citrino, vcrrucis acolytis rugosis sparsis s. confer- 

 tis, raro integris, saepius in mesogonidia fatiscentihus, 

 illis crustam granulato-leprosam citrinam, his iloccoso- 

 pulverulcntam pallide-sulfuream eilusam mentientibus, 

 cymatiis primum adpressis exiguis subimmarginatis con- 

 vexis. cerino -fia\is. — Lceidca lucida p. thejotca Ach. 

 lich. 209., syn. 48. Frics schd. cr. n. 42. 



/?. lucida, verrucis in mesogonidia fatiscentibus, — 

 Lecidca lucida a. Ach. lich. I. I. Lichcn citrinus Wah- 

 lcnb. succ. II. 800. excl. var. y, 



Var. u. ad palos asseresque quercinos raro ; p. ad 

 petras occultas montium editiorum Hercyn. et Thuring. 

 (v. c. auf der Rothenburg). 



B.Lcpidoma, blastcmatc hetcromerico-thallode, 

 phyllis subcatophliis Jiguratis orbiculatis, cymatiis basin 

 marginemquc blastematicum rcclinantibus. (Placodium 

 et Psora Iloffm.) 



-j- m clanophaenae , spcircmadochio ex spcircma- 

 tibus penitius subcuntibus nigresccntibus nigro, 

 nudo s. pruinoso. 



84G. P. canescens W., blastemate thallode adna- 

 to utrinque concolore albo, snpra incuso-pulveruleuto, 

 subtus heteroplacino tenuiter byssino, phyllis peripheri- 

 cis linearibus s. sublobatis catophliis, ccntralibus rugoso- 

 % crrucosis plerumque in chnaumata. concolora fatiscenti- 

 bus , rarissime fertilibus, crustam contiguam orbicularcm 

 monetariam mentientibus, nonnisi primitus jam in chnau- 

 mata incusa pulvinala sterilia resolutis, cymatiis atris 

 centraHbus plano-couvexis. Lccidca canesccns Ach. lich. 

 210., syn. 54. Psora cancsccns Iloffm. gcrm. 165. Lichcn 

 cuncsccns Dicks. cr. I. t. 2. /„ 5. Engl. bot. t. 5*2. 



u. xylophila, phyllis iucusis, pcriphericis liuearibus ra- 



