BOTANY OF TERKA AUSTKALlS. 87 



AZOLLA. 



Ord. Nat. Marsileacetr. 



Syst. Linn. Cryptogamia Filices. 



Char. Gen. Flores monoici. 



Masc. Gemini, involucre clause monophyllo niemhia- 

 iiacco inclusi (nunc solitarii fcniineuni stipantes), 

 ovati, biloculares, membrana exteriore transversini 

 dehiscenti : loculo superior e corpusculis 9 vel G anu^u- 

 latis, circa axin perforatum apice denuuu apertum in- 

 sertis : loculo inferiore spliscrico clause, sub duplici 

 membrana materia fluida (demum pulverea ?) replete. 



Fem. In diversis alis ejusdem frondis solitarii (nunc 

 masculo inferiore stipati): Involiwrum duplex, utr unique 

 clausum raembranaceum : exterius marium simile: 

 interiiis ovatum, evalve ; includens Capmlas nume- 

 resas evalves, G — 9-spermas, affixas pedicellis capillar! - 

 bus e receptacule communi basees involucri interieris 

 ortis. Semina angulata, radiculis exsertis. 



AzOLLA FINN ATA. Tab. 10. 



Azolla fronde circumscriptione triangulari pinnata et semibipinnata ; [612 

 foliolis superioribus papulosis, radicibus longitudinalitcr plumosis. Froth. Jl. 

 nov. holl. 167. 



In lakes and ponds, frequent within the limits of the colony of Port Jackson. 



DESC. Plantula natans, facie Jungermannia?. Itudices axillares solitariaj 

 perpendiculares hyalinae, primo aspectu simplicissimse, per lenteni phiniosa*, 

 novella3 calyptra glabra subulata tectje. Frons semuncialis : Ramis (iisticliis 

 alternis approximatis parallelis terctiusculis ; infimis haud rarb piimatis ; supe- 

 rioribus ssepe iustructis gemraulis ramuloruni nonnullis axillaribus tcrctibus. 

 Folia alterna uudique inibricata : in latere superiore frondis trapczoideo-ovata, 

 crassiuscula cellulosa, viridia passim rubicunda, margine exteriore submcm- 

 branaceo, supra convexiuscula papuloso-scabra, subtus laevia -. in latere inferiore 

 tenuiora Isevia, subconformia vix tamen angulata. Feriehatia in supcrficic 

 inferiore frondis, prope basin pinnae solitaria. 



Oha, Mr. Bauer's very satisfactory figure and tlic 

 generic character already given, will in a great measure 



