100^ CRYPTOGAMIA ALGJE. 



the crevices, and upon the timber of old houfesj 

 which has been long expos'd to the weather. 



It is only a fine yellov^ or fulphur-color'd powder. 

 We have fometimes feen it cover old mofTes, 

 which appeared exaflly as if they had been 

 powder'd with flour of brimftone. 



It bears fome refemblance to the rudimeats or firft 

 beginning of the LICHEN candelarius^ but 



^ continues unaltered, without ever forming a 



: cruft, or producing (hields. 



■;.-(' 



hotryoides BYSSUS pulverulenta viridis. Sp. fl. 1639. 



12. [Dillen. miifc. 3. /. i./. 5 J 



,:, Creen Clufter Byfllis. Anglis. 



On moift fhady banks, on the fides of ditches, and 

 fometimes upon tiles and wet walls on the north 

 fide of old houfes. VI.— IX. 

 It confifts of fmall green globules, heap'd toge- 

 ther in clufters, fo as to form a foft coat or co- 

 vering of a deep green color, appearing a little 

 ' : " rough on the furface, like chagrin. The glo- 

 . - bules, view'd through a microfcope, feem to 

 be fomewhat gelatinous. 



incana 1 3. BYSSUS pulverulenta incana, farinze inftar ftrata. 

 Sp. pi. 1639. {Bilkn.mufc. 3. /. i. /. 3.) 

 Mealy Byfllis. Anglis. 



Upon the bare earth, on fliady banks j upon old 



decay 'd 



