234 Acta Societatis pro Fauna et Flora fennica. VII. 



(em.), HI (1868) p. 185; Camel., Not. Collem. (1864); Tuck.. Gen. Lich. (1872) 

 p. 85; Bornet, Recli. Gon. (1873) p. 46, tab. 12, 15, Deuxieme Xot. Gon. (1873) 

 p. 47; Stahl, Beitr. Entw. Flecht. (1877) p. 11; Tuck., Syn. North. Am. (1S82) 

 p. 142; Hue, Addend. (1886) p. 14. Lichen B. Collema Pers. in Ust. Neue 

 Annal. 1 St. (1794) p. 21. 



Thallus foliaceus aut raro fruticulosus (in sect. Collemella 

 Tuck.) vol verracaeformis [in sect. Arnoldiella Wainio: C. mi- 

 nutulum (Born.)], homoeomericus, strato corticali et vulgo etiam 

 rhizinis destitutus, mucosus, hyphis circ. 0,0 2— 0,0 4 millim. eras- 

 sis, leptodermaticis, gelatinam abundantem e vaginis gonidiorum 

 formatam laxe percurrentibus. Gonidia nostocacea, cellulis cae- 

 ruleovirescentibus glaucescentibusve, globosis ellipsoideisve, moni- 

 liformi-concatenatis, heterocystis hyalinis intercalaribus, vaginis 

 mncilaginosis, crassis, confluentibus aut plus minusve distinctis 

 (Zn Gl 2 + I fulvescentibus aut purpureis rubescentibusve). Apo- 

 thecia thallo innata, dein mox emergentia adnataque vel adpressa 

 basique constricta, aut immersa permanentia aut jam primo 

 aperta 1 ), disco dilatato aut rarius punctiformi [in sect. Arnol- 

 diella Wainio et Arnoldia (Mass.)]. Excipulum thallodes 2 ), 

 parte exteriore e strato vel margine thallino formatum, aut in 

 apotheciis immersis indistinctum, strato corticali nullo aut paren- 

 chymatico (sect. Collemodiopsis Wainio) obductum. Hypothe- 

 tium pallidum, ex hyphis irregulariter contextis vulgo parenchy- 

 matice septatis plus minusve conglutinatis formatum, perithecio 

 grosse parenchymatico, bene evoluto aut evanescent], strato thal- 

 lino induto, impositum. Paraphyses arete cohaercntes, baud ra- 

 moso-connexae. Sporae 8:nae aut pauciores, ellipsoid eae aut glo- 

 bosae aut oblongae aut fusilbrmes aut bacillares, simplices [sect. Ar- 

 noldiella Wainio et Collemella Tuck, et Arnoldia (Mass.) et 

 Lempholcmma (Koerb.)] aut 1— pluri-septatae [sect. Synecho- 

 blastus (Trev.) et Collemodiopsis Wainio] aut murales [sect. 



1 ) Stahl, Beitr. Entw. Flecht. I p. 29. 



2 ) Collema opulentum Mont.. Fl. Chil. p. 217 (Xyl., Syn. Lich. p. 104), ad 

 genus Lecidocollema Wainio pertinet, apotheciis biatorinis, gonidiis destitutis 

 a Collemate differens. Excipulum in hac specie cartilagineum. parte exteriore 

 e cellulis pachydermaticis, lumine parvo instructis, parenchymaticis, in serie- 



hus pluribus dispositis formatum, in parte interiore hyphis irregulariter con- 

 textis, partim conglutinatis. Thallus strato corticali destiti 



