Sticta. 187 



instar Polycocci glomeruloso-intricata, moniliformi-concatenatis, 

 in zona infra stratum corticale superius thalli disposita. Apothecia 

 marginalia aut supra thallum sparsa, peltata. Excipidiint strato 

 corticali pseudoparenchymatico, crasso (cellulis fere sicut in 

 strato corticali thalli), strato medullari ex hyphis leptoderma- 

 ticis contexto, zonam goniclialem vulgo solum infra stratum cor- 

 ticale x ) continente (in sect. Lecanosticta Wainio et Lecano- 

 stictina Wainio) aut gonidiis omnino destituto (in sect. Eu sticta 

 Wainio et Eustictina Wainio). Hypothec-hint pallidum aut te- 

 staceum. Paraphyses sat arete aut sat laxe cohaerentes, gelati- 

 nam haud abundantem (in KHO sat laxam) percurrentes. Sporae 

 8:nae aut abortu pauciores, fusiformes aut oblongo-fusiformes, 

 1 — 7-septatae, decolores aut pallidae fuscescentesve. Concepta- 

 cula pyenoconidiorum thallo immersa (aut raro demum verrucas 

 thallo obductas formantia: in St. Wrightii), pallida, minute pa- 

 renehymatica. Sterigmata ramosa aut subsimplicia, constricte ar- 

 ticulata, articulis numerosis, brevibus. Pycnoconidia oblongo- 

 cylindrica aut apicibus levissime incrassatis, brevia, recta. 



Sect. 1. Lecanostictina 2 ) Wainio. Gonidia nostocacea. 

 Apotliecia gonidia continentia. 



1. St. Ambavillaria (Bor.) Wainio. Lichen Amhavillarius 

 Bor., Voy. d'Afr. Ill (1804) p. 100 (ex specim. orig. in hb. Mont.: 

 mus. Paris). Sticta Ambavillaria Del., Hist. Stict. (1822) p. 76, tab. 

 6 fig. 21; Stictina NyL, Syn. Lich. (1858—60) p. 346 pr. p. (conf. 

 Mull. Arg., Lich. Beitr. n. 62). Sticta Lenormandii Krernpelh., Fl. 

 1876 p. 62 (hb. Warm.). 



Thallus irregulariter simpliciter aut iteratim lobatus, lobis 

 circ. 35—5 millim. latis, basin versus saepe angustatis, ambitu 

 crenatis aut rotundatis, axillis vulgo angustis, superne impresso- 

 inaequalis rugosusque, plumbeus vel livido-fuscescens aut glauce- 

 scens, sorediis isidiisque destitutus, subtus pallescens, tomento 

 rhizineo crebro aut sat crebro, longitudine mediocri, cyphellis 



: ) In St. Wrightii Tuck, gonidia etiam infra hypothecium parce adsunt. 



2 ) In sect. Lecanosticta Wainio apothecia item gonidia continent, at go- 

 nidia thalli apotheciorumque sunt palmellacea. Hue pertinent St. patida Del. 

 et St caperata Xyl. et St. Wrightii Tuck. Cyphellis a Parmostictis Nyl. et 

 Ricasoliis De Not. differunt, 



