Brachythecium coruscum n. sp. 



Dioicum. Planta mascula tantum cognita. 



Cæspites laxi, decumbentes, intus decolorati, superne luteo- 

 virides — lutei, sericeo-nitentes. 



SurciUus ad 7 cm. longus, ca. 1.25 mm. crassus, apice sub- 

 regularis — curvulus — breviter hamatus, ramos vagos vel unila- 

 teraliter subpinnatos breviores vel longiores emittens, radicellis desti- 

 tutus vel fasciculis fuscarum lævium parcissime præditus. 



Caulis 0.28 mm. crassus, demum fusco-viridis, sectione angu- 

 lato-rotundatus, ob folia decurrentia aliger, fasciculo centrali ca. 

 0.03 mm. ciasso, cellulis perpaucis composito, reti ceteroquin pæne 

 a centro usque sensim crassiore, intus areolas fere hexagonas præ- 

 bente, stratis periphericis 3 substereideis, superficiali turgido. 



Folia caulina densa, im.bricata, subsecunda, ad longitudinem 

 0.25 mm. decurrentia, ex ovato — late ovato sensim in cuspidem 

 longiusculam pro more falcatam angustata, 2.4 mm. longa, 0.76— 1 

 mm. lata, plicis compluribus profundis irregularibus exarata, mar- 

 gine toto utroque inæqualiter, inferne late, superne anguste reflexa, 

 integerrima, ultimo apice tantuiri interdum indistincte emarginata; 

 tete densum, chlorophyllo pæne destitutum, nonnisi ad infimam 

 basim porosum; cellulæ basilares indistincte incrassatæ, mediaiiæ 

 subrectangulæ, 0.047 - 0.06 mm. longæ, 0.008 mm. latæ, angulares 

 in spatio triangulo bene definito quadratæ — breviter rectangulæ, 

 0.013 mm. latæ, haud crassiores; cellulæ folii medii et superioris 

 lineares, vix flexuosæ, parum crassæ, 0.075 mm. longæ, 0.0075 

 mm. latæ; costa basi ca. 0.05 mm. lata, sensim attenuata, longe 

 in fra cuspidem dissoluta, flexuosa, dorso prominens, stratis 3—4 

 cellularum uniformium composita. 



