468 



Benedict : The genus Ceratopteris 



ovate-lanceolate, blunt or acute, 1-2.5 ^"^- long, 2-5 mm, broad: 

 fertile leaves taller than the sterile, the lamina oblong, 20-55 cm. 

 long, 10-30 cm. broad, 2-5 times pinnately divided, the pinnae 



to^t r fT 





«s»«3»^"">^ -sorm-B* S t» 



■*;'. 







Figure i. Cex^lopterh thaUdroides (L.) Brongn., Lamao River, Mt. Mariveles, 

 Prov. Bataan, Central Luzon, Philippine Islands, R. 5. IVillJams 2gg. About one 

 third the natural size. 



and smaller divisions often distant, the ultimate segments flagelli- 



rows 



of 



form, 1-6 cm. long, the margins revolute, covering 2 or 3 _ . 

 areolae, and i or 2 rows of sporangia with well-developed annulus 

 and lip-cells : spores 32. [Figure i.] 



