POLYPODIACE.E. 



genus, formerly included in Pteris* The greenhouse species 

 are — pteroides, rufescens, suaveolens, odor a > hirta, micro- 

 mera, caudata, farinosa, etc. : these are from various parts 

 of the world. The last-mentioned is an exceedingly pretty 

 species, the stems being of an ebon blackness, the frond 

 dark-green above and of a pure white beneath, caused by a 

 powdery substance; it is pinnated, with the lower pair of 

 pinnae remote ; the lower segments near the rachis longer 

 than the rest. They only require a temperate greenhouse. 



SCOLOPENDRIXTM. (HaktVtongue.) 



Gen. Char. (Cryptogamia Filices.) Thecae in elongate and 

 straight lines, always in pairs, the two indusia meeting between 

 them, and at first appearing but as one indusium. 



Little marks on the lower part of the fronds of this plant 

 being somewhat like the insect called Scolopendra, the plant 

 has derived its name from this circumstance. 8. officina- 

 mm is the British species. S. Krehsii is a curious species, 

 having a pinnated frond, which is rare in this genus ; the 

 frond is more than a foot long, erect, broadly lanceolate, 

 pointed; pinnae near each other except the lower ones; 

 sori broad but long, and in pairs ; the indusia ciliated at 



