lii. GENEBA OP FEBNS: 



be without covers : nevertheless, we believe we have found un- 

 questionable indusia in the larger Canary Island species, and 

 some observers have even found, in the commoner one, a slightly 

 elevated membranous ridge, which no doubt represents this 

 part. We have ample authority for excluding the free-veined 

 Cape species from the genus. 

 Ex. : C. officinarum, Wittd. \ C. aurea, Detv. 



(b) Indusia connivent in pairs, face to face. 

 * Veins free. 



68. SCOLOPENDEIUM, Smith, Mem. Acad. Turin, v. 



410, t. 9. 



PHYLLITIS, Newman ; ASPLENII sp., Auct. ; BLECHNI sp., Auct. ; OKT- 

 CHII sp., Sunze. 



Sori indusiate, linear, often elongated ; approximate in parallel 

 and opposite pairs ; the receptacles on the anterior and posterior 

 sides of venules belonging to adjacent fascicles of veins. Indu- 

 sium linear, plane, membranaceous, each opening on its exterior 

 side, (with reference to the fascicle on which it is placed), so that 

 the twin sori open face to face. Veins forked from a central 

 costa ; venules direct, parallel, free, terminating in club-shaped 

 apices. 



Fronds thick herbaceous, simple or pinnate, frequently undu- 

 late lobate or multifid. Rhizome short, stoutish, erect or de- 

 cumbent. In some abnormal states of S. vulgare, the veins here 

 and there anastomose irregularly. The common species, S. 

 vulgare, is one of the most prolific in varieties and monstrous 

 forms among known ferns. 



Ex. : S. vulgare, 8m. I S. Hemionitis, Caw. 



S. pinnatum, J. Sm. . \ S. Krebsii, JTze. 



** Veins reticulated. 



69. ANTIGRAMMA, Presl, Tent. Pterid. 120. 



ScotopBifDEti sp., Auct. ; ASPLENTI sp., Swartz ; CAMPTOSORI sp., Link ; 

 HJJICIDICTTI sp., Pretl. 



Sori indusiate, linear elongated, approximate in parallel pairs ; 



