116 



TEENS : BEITISH AND POEEIGN. 



Sterile fronds pinnate, 1-2 feet long. Veins pinnate; vennlea 

 acntely anastomosing, forming oblique elongated areoles; 

 apices next the margin free and clavate. Fertile fronds bipin- 

 nate ; segments convolute, wholly sporangiferons. 



1. S. serratifolium. Fee, Acrost. t. 43. Polybotrya serra- 

 tifolia, Klotzsoh. — Venezuela. 



41. STEWOSEMIA, Prcsl 



Vernation fasciculate, erect. Fronds ternately pinnate, 6-18 

 inches high ; pinnae laciniately lobed, bnlbifirons. Veins pin- 

 nate ; the lower venules transversely anastomosing, forming - 



G^nas 41. — Portion of mature frond, tipper side. No. I. 



elongated cortal and sub-costal areoles, the superior venules 

 free. Fertile seginents linear, rachiform, convolute, nearly 

 wholly sporangiferous. 



J. S. aiirita, Frest. Acrostichum anritnm, Sw. ; TJowe's Ferns, 

 7, U. 52, 53. Polybotrya aurita, Bl. Fl. Jam. t. 1 ; 

 Hoole. FU, Exot, t. 81. — Java. 



