760 bulletin de l'herbier boissier. Corsinia. 



hie illic bractea parva basali instrueta. Sporae 120 (i, brunnese, reticu- 

 latim lamellatae. 



Hab. Italia, Gallia, Alpes Austriœ, Germania, Portugal, Algeria, Corfu, 

 Brasilia, Paraguay. 



CORSINIA Raddi 



Op. sc. Bologna, II, p. 354. 



Plantée thallosse, terricolse, dichotome ramosse, salco antico nullo, 

 cavernosse, cavernis unistratis, basi filiferis. Stomata simplicia. Squamse 

 posticee parvse, irregulariter distributse, e basi radiculas incrassatas pro- 

 férantes. Andrœcia linearia, utroque latere Strato lamellifero proximo 

 cristatim involucrata. Anlheridia coslse immersa, aggregata, numerosa, 

 cavernis monandris. Archegonia singularia vel in soros aggregata, strato 

 antico recedente costse inserta, litis septatis circumdata; involucrum e 

 toro pistillorum ortum, erectum, squamiforme vel magis evolutum et 

 fruetum semi-amplectens , pluristratum haud poriferum, interdum e 

 centro sori ortum apiceque umbelliforme dilatatum. Calyptra magna, 

 crassa, medio supero papillis elongatis hispidissima. Capsula sphserica, 

 magno bulbo inserta, parietibus unistratis sine libris spiralibus. Pseudo- 

 elateres 50 ^ longi, late fusiformes, fibra spirali nulla. Sporse tetrsedrse in 

 facie convexa reticulatim sulcatse. 



1. C. marchantioid.es Raddi, 1. c. 



Bioica, interdum monoica, pallide viridis, spongiosa, fragilis, arete 

 repens. Frons usque ad 2 cm. longa, furcata, furcis divergentibus, late 

 oblongis, apice breviter emarginatis et squamarum appendiculis protectis, 

 antice subplana, stomata parva, poro a 6 cellulis concentricis circumdato; 

 costa strato antico duplo humiliore duploque angustiore, postice plano- 

 convexa, sensim in alas attenuata, medio dense radiculosa. Squamœ pos- 

 tiese hyalinse, conicae, appendiculo apicali longissimo, filiformi. Stratum 

 anticum laxe cavernosum, Alis chlorophylliferis e fundo cavernarum 

 ortis. Ostiola mascula parum prominentia. Involucrum pro more parvum, 

 irregulariter laceratum, fruetum a tergo tegens. Sporse 120 ji, anguste 

 alatse, ala aspera, cuticula e laminis magnis hexagonis formata, cuticula 

 interlaminari angusta minusque crassa retiformi. 



57 



