DES LICHENS. 18t 



Phlyct.). — P. verrucosa Mont., P. melanospora ^'yl., H 



lecanorina Nyl. exempla exotica hujus generis. 

 XVI. puLYCTis Wallr. 



Thallus cruslaceus vel pulvereus, tenuis. Apothecia erum- 

 ]»cntia difforniia, thecal 1-2 sporae, sporse magnae oblongo- 

 fiisiformes vel ellipsoidea?, multiloculares. Gelatinahyiiienoa 

 modo tliecas ambiens iodo coerulescit. 



1. Phi. agelcea Wallr., Nyl. L. P. 51. G. — 2. Phi. argeua 



Wallr. G. 

 IVII. THELOTREMA Ach. 



Thallus cruslaceus. Apothecia margine cincta duplici : 

 proprio acuto, primuni peritheciiformi clauso, dein dilare- 

 ralo, et externo Ihallino, sporse fusiformes niagnai multilo- 

 .cuJares. Gelatina hymenea iodo non colorata. (1) 



"i. Th. lepadinum Ach., Nyl., L. P. 48. G. — Species quaedam 



. exolicae hue relatfe{ut Th. Auberianum Mont., Th. olivaceum 



Mont.) diffeiunt sporis mediocribus 4-6- locularibus iodo vio- 



lacee obscuratis et hypothecio lateribus baud ascendente, ue« 



a margine thallino discrete. 



Trih. XIV. Lecidlnei. 



f Apothecia typice Lialorina. 



I. coENOGOMLM Ehreub. 



II. LECiDEA Ach., emend, defin. 



Thallus cruslaceus (radiosus, squamulosus, caulescent, 

 granulatus, areolatus, continuus, pulvereus). Apothecia vcl 

 biatorina f typice pallide colorata) vel (in subdivisione hujus 

 tribus altera) lecideina (typice primitusque margine nigra). 

 Apothecia rarissime parasitica, thallo proprio carentia. 



(1) Conformatio in Thelolremate lepadino « marginis proprii » 

 apolhecii h. e. hypothecii lateralis ascendentis, latere suo interno 

 elementis filamentosis articulatis verticalitersilis, vel versus hynie- 

 nium contendentibus, agglutinatis, filamenta ostiolaria Pyrenodeo- 

 rum refert. Locus hujus generis systematicus.sequeacPertusariarunt, 

 versus banc tribum vergit, sed apothecia facile typice discoid<a 

 uexuni propiorem cum Lecanoreis indicare videtur. 



