910 



V. SALVINIE-E. 



V. SALVINIEjE.Bartling. 



Acotyledonous aquatic plants. Fronds with edges reflexed in vernation. Fruc- 

 tification rhizocarpian, enclosed in distinct l-celled sporocavps. Anthbridia and 

 SPORANGIA springing from a branched placenta, situated at the bottom of the sporocarp. 

 Spore solitary, Prothallus with several archegorda. 



Salvinia. 



Involucred conceptacle 



(mag.). 



Salvinia. 



Yertical section of a (J 



cx>nceptacle (mag.). 



Salvinia. 



Transverse section of a 9 



conceptacle (mag.). 



Salvinia nataiis. 



Salvinia. 



Conceptacle without 



involucre. 



Sal'fHnia. 



Group of sporangia 



(mag.). 



Salvinia. 



Frothallus coming out 



of the spore (mag.). 



(Pringsheim.) 



Salvinia. 



Prothallus- beginning to 



develop into a frond. 



(Pringsheim.) 



Salvinia. 

 Prothallus in an advanced stage 

 of germination. (Pringsheim.) 



Annual floating herbs, not attached to the soil, resembling large Lemnce 

 (Salvinia), or ^Jungermannia (Azolla), with no true stem. Fronds with margins 

 reflexed before expansion, usually claret-coloured on the under surface, sometimes 

 composed of cellular tissue, without nerves and stomata [Salvinia); sometimes with 

 a stomatiferous epidermis {Azolla), rounded or lobed, sessile or sub-sessile, alternate 



