AN ENUMERATION OP CULTIVATED FERNS. 



167 



of the pedicels of the sporangia concrete, forming thickened 

 receptacles. Sori round, confluent. 



Genus 82. Portions of sterile and fertile pinna, natural size, and ditto 

 fertile, enlarged. No. 1. 



1. S. Germanica, Willd. ; Lowe's Ferns, 2, t. 63 ; Hook. Gen. 



Fil t. 69. Onoclea Struthiopteris, Sw. ; SchJc. Fil. 

 t. 105. Germany. 



2. S. Pennsylvanica, Willd. North America. 



7. Phegopteri'je. Sori pundiform, rarely oblong, naked, 

 or seated in the axis of reflexed indusiform dents. 



83. AMPHIDESMITJM, Schott. 



Vernation fasciculate, decumbent and criniferous. Fronds 

 pinnate, 4-6 feet long, smooth ; pinnae linear-lanceolate, adhe- 

 rent. Veins simple or rarely forked, parallel. Receptacles 

 punctiform. Sori medial, round, criniferous, irregular, often 

 more than one on the same vein. 



