GLOSSAKT. 151 



Reflexed. Turned back, so as to approach the base. 



Reniform. Kidney-shaped. 



Replicate. Doubled down so that the upper part comes in contact with 



the lower. 

 Revolute. Turned backwards from the extremity upon the under 



side. 

 Revolute-margin. The margin turned back. 

 Rhizoma. The root stem. The stem from which the roots descend, 



and the fronds rise. 

 Rhomboidal. Somewhat of the form of a rhomboid. 

 Rugose. Rough or wrinkled. 

 Scaly. Furnished with scales. 



Segments. The subdivisions of any parts or organs. 

 Serrate. Notched like a saw on the edges. 

 Serrulate. Notched like a small saw on the edges. 

 Sessile. When without a petiole or leaf-stalk. 

 Simple-frond. An entire undivided frond. 

 Simple veins. Single veins without branches. 

 Sinuses. The depression between two projections. 

 Sori. Little clusters of capsules, which are a mass of cellular substance 



without cotyledons, and germinate indifferently from any part of 



their substance. 

 Sori-effuse. When sori spread out. 

 Sphagnum. A water moss. 



Sporangia. The seed vessels containing the sporules. Seed cases. 

 Sporangiferous. Sporangia. 

 Sporules. A number of contained cells in the sori from which new 



plants are produced. 

 Stellate-pubescence. Star-like hairs or scales, disposed in a radiating 



manner round a centre. 

 Sterile-frond. Barren frond. 

 Stipes. The foot-stalk of the frond, that portion below the pinnae or 



leaves. 

 Sulauriculate. Nearly- eared. 

 Subbipinnate. Nearly twice pinnate. 

 Subcrenate. Slightly jagged. 

 Subimbricate. Nearly imbricate. 

 Subsessile. Almost without a leaf- stalk. 

 Suhterminal. Near the extremity. 

 Terminal. When the sporangiferous receptacle is formed on the apex of 



the venules, it is said to be terminal. 

 Ternate. Arranged by threes. 

 Ternate rachis. Ternate stalk. 



