OXIT. SEITEBA OS lEBNS : 



palmato partite or pinnate; the pinnae sometimes articulated. 



Ehizome csespitose. — This genus is distinguished &om Lygodium 



by its reticulated venation. 



Ex. : H. seandens, Preal. | H. madagaseariense. Pair. 



H. heterodosum (Lygodium, KzeJ 



§ 2 SCHIZ^S-S. 



(a) Fructifications paniculate on special contracted pimuBform 

 appendages. 



160. SCHIZ^A, Smith, Mem. Acad. Turin, v. 419. 



EipTDiTTM, Senihardi; LopHrDlUM, Sichard; Actinostachtb, JVaUich; 

 BsLTlsi/B sp., Mirbeli ACKOSTICHI sp., Auct.; Osmxtnd^ sp., Auct. 



Fructifications paniculate ; the spore-cases borne on the inner 

 face of contracted fertile crests or appendages, which are digitato- 

 pinnate or peotinato-pinnate, erect or incuryed, and more or less 

 connivent. Spore-cases bluntly ovate, having a many-rayed apical 

 ring; sessile, arranged in one or two series on each side the 

 costs of the linear segments or pinnee of the appendages. Veins 

 reduced to the costa, or flabeUato-dichotomous ; the venules ex- 

 current in the apical t«eth. 



IFronds simple, bearing (when fertile) a pectinate or digitate 

 crest of crowded terminal resupinate pinnse; or flabeUate or 

 dichotomously multi-partite, bearing the fertile crests on the 

 apex of the segments. Khizome csespitosely creeping. — Of this 

 curious genus there are three rather dissimilar groups, but they 

 do not appear to present differences of generic value. Indeed, 

 the § Lophidium, perhaps, hardly affords » valid sectional dis- 

 tinction in the dichotomous or flabeUate condition of the 

 &onds. 



§ Ripidium. — ^Panicle pectinato-pmiiate on the simple or forked stipes ; 

 spore-cases bi-seiiaL 

 Hx. : S. bifida, WUld. I S. aostralis. Gaud. 



S. pectinata, Sm. \ S. posilla, Ftirsh. 



§ Lophidium. — ^Fanide pectinato-pinnate on the ilahelliform more or less 

 dichotomous tronds ; spore-cases bi-seriaL 

 El. : S. elegans, Sm. | S. dichotoma, Sm. 



§ Actinottachys. — ^Panicle digitato-pinnate ; spore-cases quadri-serial. 

 Ex. : S. digitata, Sw. | S. pennula, Stc. 



