19 



(a) Indusia cucullate behind the son, on the contracted 

 incurved pinnules. 



113. ONOCLEA, Linnceus, Phil. Sot. 156, (reduct.) 



AITGIOPTEBIS, Mitchell, (non Hoffmann); CALYPTBBIUM, Bemhwdi; 

 RIEDLEA, Mirlel, in part; RAGIOFTEBIS, Preil. 



Son indusiate, few, large, globose, approximate and at length 

 confluent beneath the conniving margin of the roundish sessile 

 bacciform pinnules ; the receptacles medial, elevated. Indusium 

 (special) a cucullate reticulated membrane placed behind each 

 sorus. Veins (sterile) reticulated ; the venules forming irregular 

 hexagonoid areoles ; or (fertile) simple, direct, free. 



Fronds dissimilar, the sterile pinnato-pinnatifid, the fertile 

 bi-pinnate ; the pinnules contracted incurved, sub-globose, or 

 bacciform. Ehizome creeping. A very elegant and distinct 

 genus, which we think Mr. Smith correctly refers to the Aspi. 

 diece, though the nature of the special indusia, is not easily made 

 out. Sagiopteris of Presl, is said to have the venules of the 

 sterile frond forked or simple, and free. There is probably some 

 mistake, although the figures of Schkuhr and Presl, have not 

 been to us satisfactorily explained. 



Ex. : 0. sensibilis, Lin. \ ? 0. augescens, Lk. 



? 0. obtusilobata, Schkr. 



(b) Indusia orbicular, peltatety affixed. 

 * Veins reticulated, with free included veinlets, 



114. ASPIDITJM, Swartz, Schrad. Journ. 1800, ii., 4, 29 

 (reduct.) : Schott, Gen. Fil. (t. 4.) 



BATHMIUM, Presl: Link; PBOFBBEA, Presl; PODOPELTIS, Fee; POLT- 

 pODiisp., Auct.; TBCTABLB sp., Cavanille; PHYMATODIS sp.,Prel; 

 DBTN AEI^ sp., Fee. 



Sori indusiate, rotundate ; the receptacles compital i.e. pro- 

 duced on the points where several veins join, or medial, more 

 rarely terminal. Indusium orbicular peltate. Veins pinnate, 



[April, 1857.] H 



