910 



V. SALVINIE^. 



V. SALVINIE^Bartling. 



Acotyledonous aquatic PLANTS. FRONDS with edges reflexed in vernation. FRUC- 

 TIFICATION rhizncarpian, enclosed in distinct 1-celled sporocarps. ANTHERIDIA and 

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

 SPORE solitary. PROTHALLUS with several archegonia. 



Kalrinia. 



Inrolncred conceptacle 



(mag.). 



tialrinia. 



Vertical section of a <f 



conceptacle (mag.). 



Transverse section of a 9 

 conceptacle (mag.). 



ffal mi in nntn ii. <. 



Saleinia. 



Conrcptaclc without 

 involucre. 



Salvinia. 



Group of sporangia 

 (mag.). 



Protballus coming out 



of the spore (mag.). 



(Priugsheim.) 



Salrinia. 



Prothallus beginning to 



develop into a frond. 



(Pringghcim.) 



Salrinia. 



Prothallus in an advanced stage 

 of germination. (Pringsheim.) 



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

 (Salvinia), or a Jungermannia (Azolld), 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 



