Targionia. franz stephani. species hepaticarum. 763 



nullo. Archegonia ad 3 vel 4 alveolo costse inserta, paraphyllis circuin- 

 data. Involucrum tenue, erectum, monophyllum, cucullatum. Calyptra 

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

 unistratis, celluhs semiannulatim incrassatis. Elateres parvi, fusiformes, 

 spiraliter incrassati. Sporse tetrsedrEe magnee, grosse papulosse. 



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



Syn. Boschia Weddellii Mont. Ann. sc. nat. 1836. 



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

 cuhs villosa, arcte repens, apice parum angustata, 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, sqiiamae fusco-purpureee, imbricatse, 

 late iunatse, margine irregulariter longeque limbriatse. Stomata simplicia, 

 poro magno, 5-6 celluhs angustis circumdato. Stratum lamelliferum duplo 

 humilius quam costa ; cavernae amplee, sub 14 in diametro frondis, fihs 

 chlorophylliferis, 3-4 cellulas longis dense repletae. Antheridia ostiolis 

 longis angustis. Archegonia in fundo foveolse, strato lamellifero vallatim 

 ampliato circumdat8e;paraphynis filiformibus 3-4 cellulas longis. Involu- 

 cram juvenile squamseforme, pistilla a tergo tegens, post fecundationem 

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

 dorso cellulis poriformibus paryis oleiferis punctatum. Cahjptra basi 3-4 

 cellulas crassa, superne tenuis. Sporse 60 u. 



Hab. Brasilia (Weddel, Burchell.) 



TARGIONIA L. 



Sp. pl. p. 1604. 



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

 latere costas innovata, rare dichotome ramosa, cavernosa, cavernishumil- 

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

 radiculas incrassatas proferentes. Inflorescentia monoica vel dioica. 

 Androecia in ramuUs parvis, e iatere 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 



