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SORI (Sing. Sorus). The clusters of theca;. 
SPINE. A thorn. 
SPORANGIA (Sing. Sporangium). The thecae. (Which see.) 
SPORES. The minute organs from which new plants are 
produced. 
STIPES. The bare stem below the leafy part of the frond. 
SUCCULENT. Soft and juicy. 
THECAE (Sing. Theca). The cases containing the spores. 
TRIFID. 
TRI-PINNATE. 
Cleft into three. 
Three times pinnate. 
VENATION. The arrangement of the veins. 
VENULES. The smaller branches of the veins. 
VERNATION. The manner of growth. 
WING. 
A membranous expansion of the rachis or 
mid-rib. 
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