BOTANY OP TERRA AUSTRALIS. 87 



AZOLLA. 



Ord. Nat. Marsileaeece. 



Sjst. Linn. Cri/ptogamia FUices. 



Char. Gen. Flores monoici. 



Masc. Gemini, involucro clause monophyllo membra- 

 naceo inclusi (nunc solitarii femineum stipantes), 

 ovati, biloculares, membrana exteriore transversim 

 deliiscenti : hculo superiore corpusculis 9 vel 6 angu- 

 latis, circa axin perforatum apice demum apertum in- 

 sertis : loculo inferiore spliserico clauso, sub duplici 

 membrana materia fluida (demum pulverea ?) repleto. 



Fem. In diversis alis ejusdem frondis solitarii (nunc 

 masculo inferiore stipati): Involucrum duplex,utrumque 

 clausum membranaceum : exterius marium simile : 

 interius ovatum, evalve ; includens Capsulas nume- 

 rosas evalves, 6 — 9-spermas, affixas pedicellis capillari- 

 bus e receptaculo communi baseos involucri interioris 

 ortis. Semina angulata, radiculis exsertis. 



AzOLLA PINNATA. Tab. 10. 



AzoUa fronde circumscriptione triangulari pinnata et semibipinnata ; [613 

 foliolis superioribus papulosis, radicibus longitudinaliter plumosis. Prodr.fl. 

 nov. holl. 167. 



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



DESC. Plantula natans, facie Jungermanniae. Radkes axillares solitarise 

 perpendiculares hyalinae, primo aspectu simplicissimas, per lentem plumosaj, 

 novellje calyptra glabra subulata tectse. Prons semuncialis: Ramis distichis 

 altemis approximatis parallelis teretiusculis ; infimis hand rarb pinnatis ; supe- 

 rioribus ssepe instructis gemmulis ramulorum nonnuUis axillaribus teretibus. 

 Folia altema undique imbricata : in latere superiore frondis trapezoideo-ovata, 

 crassiuscula cellulosa, viridia passim rubicunda, margine exteriore submem- 

 branaceo, supra convexiuscula papuloso-scabra, subtus lasvia : in latere inferiore 

 tenuiora Isevia, subconformia vix tamen angulata. Perichatia in superfioie 

 inferiore frondis, prope basin pinnse solitaria. 



Obs. Mr. Bauer's very satisfactory figure and the 

 generic character already given, will in a great measure 



