SCHISTOSTEGE.E. [ 680 ] 



SCHIZOCHLAMYS. 



bell-shaped. Inflorescence dioecious, plants 

 similar. 



The only species of this genus, the elegant 

 little Sch. osmundacea, Web. and Mohr (Sch. 



Fig. 627. 



Schiotobtegu osmundacea. 

 Leaves of barren branches. Magnified 50 diameters. 



pennata, Hook, and Taylor), occurs here and 

 there in Great Britain. The name was 

 derived from what appears to have been an 

 erroneous observation of Hedwig, who de- 

 scribed radiating fissures in the operculum, 



Fig. 628. 



Fig. 629. Fig. 630. 



Schistostega osmundacea. 

 Fig. 628. A plant and fruit. Magnified 10 diameters. 



Fig. 629. Open capsule with operculum. Magnified 

 50 diameters. 



Fig. 630. Young capsule opened, showing the colu- 

 mella. Magnified 50 diameters. 



which do not exist in living specimens. 

 The germinating confervoid prothallium of 

 this moss was described by Bridel as an alga, 

 under the name of Catoptridium smarag- 

 dinum ; A gardh described it as a Protococcus 

 (smaragdinus) j and it was long supposed to 

 be phosphorescent : this appears to be an 

 error : tichistoslega grows on the roofs of 

 sandy caves and similar places j and the 



luminous appearance seems to arise from 

 the condensation and reflection of the little 

 daylight admitted, by the pellucid convex 

 cellules of the prothallium. 



SOHIZ^E'A, Smith. A genus of Schi- 

 zseaceous Ferns, of curious and elegant struc- 

 ture : several species : exotic (figs. 081. 

 632). 



Fig. 631. 



Schizaea dichotoma. 

 Fig. 631. A fertile pinna. Magnified 5 diameters. 



Fig. 632. A pinnule with sporanges. Magnified 25 

 diameters. 



SCHIZ^EA'CE^E. An order of Poly- 

 podiaceous Ferns. 



Char. Sporangia 2-valved, opening down 

 the side, crowned by a complete operculiform 

 ring ; indusium none. Genera : 



Schizcea. Sporangia sessile, in 2-4 rows, 

 covering one side of close distichous spikes, 

 which form separate fertile segments at the 

 apex of the fronds. 



Anemia. Sporangia small, very numerous, 

 forming a copiously branched panicle, di- 

 stinct from the leafy part of the frond. 



Mohria. Sporangia sessile, on the bark 

 of the leafy frond, near the edge. 



Trochopteris. Sporangia small, sessile, 

 placed irregularly round the edge on the 

 under side of the slightly contracted lower 

 lobes of the leafy frond. 



Lygodium. Sporangia solitary, or casually 

 in pairs, in the axils of large imbricated 

 clasping involucres, which form spikes, either 

 in separate pinnae or in lax rows along the 

 edge of the leafy ones. 



SOHIZOCH'LAMYS, Br. A genus of 

 Palmellaceae (Confervoid Algse). S. gelati- 



