526 BULLETIN DE l'herbier boissier. MavchmiÜa. 



longa, 4 mm. lala; costa distincte producta, convexa, alae tenues. Epider- 

 mis valida. Stomata parva, parum prominula, ore interno subquadrato, 

 4 cellulis angustis formato. Appendicula squamarum valde constricta, 

 ovata, acuta, parvicellularia, margine plus minus longe spinoso-dentata. 

 Pedunculus carpocephali 2 cm. longus, tenuis, paleis lanceolatis ubique 

 Inrtus, magis in apice pedunculi. Capitula fem. asymmetrica, basi 

 anguste hastata, ceterum quinqiieloba, lobis basi valde angustatis, quasi 

 stipitatis, apice abrupte obconicis, truncatis. Involucra hyalina, integer- 

 rima, crispatula. Capitula mascula symmetrica, usque ad basin bis-quadri- 

 fida, pedunculo subnudo breviore, 8 mm. longo. Reliqua desunt. 

 Hab. Nova Caledonia, Ourai (Lecord). 



52. Marchantia caracensis St. n. sp. 



Minor, angusta, gracilis, olivacea, postice fuscescens. Frons ad 25 mm. 

 longa, 3 mm. lata, crassa. Costa bene producta, sensim in alas validas 

 excurrens. Epidermis tenera. Stomata magna, creberrima, bene producta, 

 ore interno magno, quadrato, 4 cellulis angustis circumdato. Appendicula 

 squamarum magna, rosea, late ovata, acuta, arcte constricta, cellulis a 

 basi ad marginem valde decrescentibus, margine eroso-denticulata. 

 Pedunculus carpocephali tenuis, ad 15 mm. longus, paleis longis hirtus, 

 apice similiter barbatus; paleœ involucrales late lanceolatse, cuspidatse, 

 dentatse vel lacinulatae, omnes purpureae. Capitula fem. parva, 5-6 lobata, 

 cenlro integi^o parvo, convexo, lobis ex angusta basi oplime obcuneatis, 

 contiguis, diametro centri duplo longioribus, convexis, decurvulis, apice 

 truncato rotundatis. Involucra hyalina, margine lobulata, lobis breviter 

 limbriatis, Perianthia hyalina, ore contracte integro. Capsula fusco 

 bruLinea, crebre annulata. Reliqua desunt. 



Hab, Caracas (Gollmer), Mexico (Wawra). 



53. Marchantia Ksernbachii St. n. sp. 



Frons parva, angusta, gracilis, ad V/2 cm. longa, 3 mm. lata, crassa. 

 Costa lata, abrupte producta, postice piano convexa. Epidermis anlica 

 validissima, cell, parietibus sequaliter incrassatis. Stomata parva, nume- 

 rosa, ore interno quadrato, 4 cellulis angustis circumdato. Appendicula 

 squamarum magna, oblonga, laxe reticulata, margine regulariter spinoso- 

 dentata, apice obtusa, Pedunculus carpocephali ad 20 mm. longus, sub- 

 tenuis, apice paucis paleis pendulis et filiformibus barbatus. Capitula 

 fem. excenlrica, uno latere 9 lobata, lobis regulariter radialis, ex angusta 

 basi conico-ampliatis, approximatis, apice breviter bifidulis vel excisis vel 



188 



