398 SpHiEROcoccoiDEJ5. Phacelocarpus. 



Frons compressa distiche pectinata, aut teretiuscula et quo- 

 quoversum aculeata, triplici strato tubum articulatum 

 centralem ambiente contexta; interiore filis elongatis ar- 

 ticulatis longitudinalibus dense intricatis; medio cellulis 

 majoribus rotundatis, exteriore cellulis minoribus sub- 

 verticaliter radiantibus. Frucfus utrique inter dentes 

 aculeosve externi. Cystocarpia rotundata aut fere reni- 

 formia, supra partem inferiorem incrassatam, inter labia 

 pericarpii convergentia, poro aut rima hiantia; placenta 

 a fundo incrassato adscendens, superne planata, fila gem- 

 midiifera stricta densissime constipata, adparenter sim- 

 plicia^ articulata sursum emittens; gemmidia in articulis 

 supremis prsecocioribus per zonas concentricas mature- 

 scentia, matura oblongo-cylindracea utrinque truncata. 

 Nemathecia clavseformia aut magis rotundata, in cryptis 

 intra superficiem excavatis sphaBrosporas parietales ob- 

 longas zonatim divisas inter paranemata fasciculata fo- 

 ventia. 



Genus fructu utroque suse indolis distinctissimum, affini- 

 tate diu dubium. Cystocarpia in diversis speciebus quoad 

 externam formam paulisper diversa; structura fere congru- 

 entia. In Ph. Labillardierii sunt magis reniformia, capsulam 

 Lycopodii selaginis fere referentia, in Ph. complanato rotun- 

 diora, in aliis veri'ucosa a nematheciis facilius distincta; pro 

 forma diversa, aut poro aut rima magis lunata hiantia; et 

 aperturam fere claudiunt labia incrassata pericarpii subincur- 

 vati. In vallecula inter labia excavata, placenta centralis 

 adscendit, superne explanata, et a plano nucleum hemisphse- 

 ricum emittens. Nucleus filis constat radiantibus stipatissi- 

 mis invicem" vix sejungendis, in inferiore parte tenuioribus; 

 in superiore, secus totam peripheriam crassioribus, gemnii- 

 dia generantibus. Gemmidia in singulis filis articulatis se- 

 riata, intra articulos ut videtur singula, oblongo-cylindracea 

 fere utrinque truncata, peripherica sensim maturescentia, et 

 matura extra superficiem nuclei sensim elevata. Placenta a 

 filo axili frondis, ut videtur, proveniens, ipsa quasi stipite et 

 disco planato constituta, stipite forsan in divcrsis speciebus 

 plus minus conspicuo; In Ph. apodo stipitem obconicum vidi 

 admodum conspicuum, ipsum ccllulosum. 



