10 E. A. Vainio, Baeomyceae. 



4. B. fuscorufescens Vain. (n. sp.). 



Baeomyces byssoides Schaer. Lich. Helv. Exs. II (1823) n. 32 (in 

 herb. D.C.), haud Lichen byssoides L. Mant. (1767) p. 133. 



Thallus squamosus aut partim crustaceus areolatusque, 

 squamis O.2 — 3 mm longis, O.2 — O.s mm latis, planis con- 

 vexisve, adscendentibus aut p. p. adnatis, saepe plus minus 

 sorediosus, albidus aut pallidus, KHO lutescens deindeque 

 rubescens. Apothecia peltata aut subpeltata, stipitata aut 

 raro subsessilia, stipite compresso aut fere terete, demum 

 costato, pallido nudoque aut parte inferiore zona gonidiali 

 areolata obducto, disco depresso-convexo, fuscescente vel 

 rufo-fuscescente aut raro partim rufescente, KHO non ru- 

 bescente (solutionem subolivaceam effundente). 



Distr. Ad terram arenosam et ad saxa rupesque col- 

 lectus. Ab.: Ad Vanjarvi in Vihti (G. Lang). Ta.: Asikkala 

 (J. P. Norrlin), Evo (G. Lang), Messukyla (P. A. Karsten). 

 KOn.: Valkeamaki (Th. Simming, „B. rufus v. carneus" in 

 Norrl. Fl. Kar. Oneg. II p. 11). KTranson.: Povjenets 

 (A. Kullhem). Ob.: Aavasaksa (E. Nyl., hb. Nyl. 40309). 

 LKem.: Katkesuanto in Muonioniska („B. rufus" in Norrl. 

 Ber. Torn. Lappm. p. 317). LEnont.: Prope Kaaresuanto et 

 Enontekiainen („B. rufus v. carneus" in Norrl. 1. c). LTul.: 

 Kuolla (P. A. Karsten). 



Thallus plagas usque ad 7 cm latas formans, squamis tenui- 

 bus, vulgo contiguis, difformibus aut rotundatis, interdum margins 

 crenulatis, subtus albidis, raro areolatus, partim rhizinas breviores, 

 ramosas emittens, strato cortical! haud evoluto, hyphis leptoder- 

 maticis, O.0025 — O.ooi? mm crassis, crebre irregulariter contextis, 

 KHO demum crystalla rubra, acicularia formans. Stipes long. 

 — 5 mm, saepissime brevior, haud convolutus, partim extus KHO 

 lutescens et crystalla rubra formans, intus solidus et chondroideus, 

 pachydermaticus, cavitatibus tenuissimis, in parte exteriore mem- 

 branis minus incrassatis. Apothecia lat. circ. O.7 — 2.2 mm, sat 

 tenuia, depresso-convexiuscula, vulgo subsolitaria, margins inter- 

 dum conspicuo pallidoque, vulgo excluso aut reclinato. Excipu- 

 lum chondroideum, solidum, extus KHO sicut thallus reagens. 

 Hypothecium superne anguste pallidum, ceterum decoloratum. 

 Hymenium circ. O.060 mm crassum, totum pallidum, epithecio 

 intensius colorato, jodo non reagens. Paraphyses in KHO 



