430 JV. Lichenes, 2. discocymatii. 



900, P. liumosa W., blastemate hyalodermatino aco- 

 lyto granuloso-verrucoso prasiuo-virente, grauulis exiguis 

 sparsis dein confertis subylobosis crustam verrucoso-pli- 

 catam mentientibtls, cymatiis sessilibus nigris planis dein 

 convexis subglobosis nitidis marginem reclinantibus intus 

 concoloribus. P. liumosa Wallr. in lit. 



a. gcophila, bl. verrncis demum confluentibus crustam 

 inconditamtenuiter-granulatam mentientibus. Lecidca uli- 

 ginosa (3. Iiumosa Ach. syn. 26. Vcrrucaria humosa 

 Hoffm. gcrm. 191. Lichcn humosus Ehrh. pr. pr. 



p. xylophila, bl. vcrrucis sparsis primum hypophloeode 

 dein crustam granulatam macularem mentieutibns. 



Ad terram nudam promontoriorum arenosorum Thu - 

 ring., Hercyn. inferior.,* /5. ad truncos quercinos caesos 

 vetustos Hercyn. passim. (A P. uliginosa aifatim dillert, 

 viva potius P. vernalem mentitur , blastemate tenuiter 

 hyalodermatino tamen et cymatiis diversa, quae nonnisi 

 in speiremata nuda resoluta Spttoma humosum Ach. lich. 

 139. ibrsan praestant.) 



901. P. nigra W., blastemate hyalodermatino aco- 

 lyto granulato, (sicco) cinereo-virente hypothemati nigro 

 mediotenus rimoso ambitum fimbriatum s. b) r ssino-radia- 

 tum argenteum spargente limitato, granulis primum ad- 

 pressis punctiformibus convexiusculis demum inciso-cre- 

 natis, crenis nonnisi iu ramulos teretiusculos excrescen- 

 tibus crustamque plicato-verrucosam coralloideamque men- 

 tientibus, cymatiis primum umbilicatis nitidis dein spei- 

 remadochium planum melanopbaenum opacum margine ni- 

 tido piceo cinctum recludentibus intus dilutioribus, raro 

 hypothematicis iisque in speiremata immarginata laxa 

 desciscentibus. Collema nigrum Hoffm. gcrm. 103. pr.pr. 

 Mart. erl. 230. Ach. lich.G28.excl. syn. pl, syn.Z0S.pr.pr. 

 Lccidea nigra Ach. mcth. 67. Lichcn nigcr Huds. Wah- 

 lcnb. suec. 11. 834. Tcrrucaria atra Mocnch. Humb. 



p. corallinoidcs, bl. plerumque hypothemate destituti 

 granulis crenatis in stauromata teretia ramulosa excrescen- 

 tibus crustamque obesam pulvinatam rimosam plerumque 



