220 



PAGE 



Stipes club-shaped at the base, and spring- 

 ing between two fleshy stipules. Pinnae 

 and pinnules articulate with the rachis. 



Genus LI. Angiopteris Hoffmann 197 



SUB-ORDER VL OPHIOGLOS- 

 SACE^E 



Sporangia deeply two-valved, opening 

 down the side nearly to the base, without 

 a ring ; vernation erect. Fronds bearing a 

 sterile and fertile branch on the same 

 stem. 



Sporangia sessile, arranged in two rows, 

 forming a. narrow close spike which arises 

 from the base or centre of the barren 

 segment, rarely distinct, rising direct from 

 the rhizome ; veins reticulate ; fronds 

 simple, entire, rarely palmate. 



Genus LI I. Ophioglossum L. 198 



Sporangia more or less round, sessile in 

 stalked whorls which are terminated by a 

 crestrlike appendage, formi <g a clustered 

 simple spike, opening vertically by a slit 

 on the exterior side. Fronds divided into 

 fertile and sterile segments, the latter 



