Targionia. franz stephani. species hepaticaru.u. 763 



nullo. Archegonia ad 3 vel 4 alveolo costae inserta, paraphyllis circum- 

 data. Involucrum tenue, erectuni, monophyllum, cucullalum. Calyptra 

 tenuis, lsevis; capsula magna, globosa, parvo bulbo inserta, parietibus 

 unistratis, cellulis serniannulatim incrassatis. Elateres parvi, fusiformes, 

 spiraliter incrassati. Sporte tetrsedrse magnse, grosse papulosee. 



1. F. Weddellii (Mont) Trev. 1. c. 



Syn. Boschia Weddellii Mont. Ann. sc. nat. 18o6. 



Dioica; Frons usque ad 25 mm. longa, anguste linearis, simplex, radi- 

 culis villosa, arcte repens, apice parum angustala, breviter incisa, rima 

 appendiculis squamarum repleta, antice plana, marginibus adscendentibus, 

 ipso margine acuta, integerrima, costa valde convexa, sensim in alas 

 excurrens, ad latera squamis obtecta, squamae fusco-purpurese, imbncatse, 

 late lunatse, margine irregulariter longeque finibriatse. Stomata simplicia, 

 poro magno, o-6 cellulis angustis circumdato. Stratum lamelliferum duplo 

 humilius quam costa ; cavernae amplse, sub 14 in diametro frondis, fîlis 

 chlorophylliferis, 3-4 cellulas longis dense replet«. Antheridia ostiolis 

 longis angustis. Archegonia in fundo foveolae, strato lamellifero vallatim 

 ampliato circumdatse ; paraphyllis filiformibus 3-4 cellulas longis. Involu- 

 crum juvenile squamœforme, pistilla a tergo tegens, post fecundationem 

 valde evolutum, fructum obvelantem, basi pluristratum, superne tenuis, 

 dorso cellulis poriformihus parvis oleiferis punctatum. Calyptra basi 3-4 

 cellulas crassa, superne tenuis. Sporœ 60 u. 



Hab. Brasilia (Weddel, Burchell.) 



TARGIONIA L. 



Sp. pi. p. 1604. 



Plantae thallosse, terricolee, repentes. Frons simplex, ex apice vel e 

 latere coste innovata, rare dichotome ramosa, cavernosa, cavernis humil- 

 limis, filiferis ; stomata magna, simplicia ; squamse posticse e basi laminaque 

 radiculas incrassatas proferentes. Inflorescentia monoica vel dioica. 

 Andrœcia in ramulis parvis, e latere costse ortis, ostiolis papilliformibus. 

 Archegonia in soro aggregata, e sulco apicali orta, post fecundationem 

 fronde antice increscente a dorso tecta, — postice marginibus sulci am- 

 pliatis — immersa denique involucro bivalvi occulta. Calyptra pluristrata. 



60 



