Benedict: The genus Ceratopteris 



471 



mate segments broadly ovate or deltoid, usually blunt or rounded : 

 lamina in succeeding leaves 2-4 times divided with narrowly ob- 

 long, rounded segments, grading into the slightly taller sporophyls 

 with linear segments : leaves in the anchored plants as above but 



FlGUhE 2. Ceratopteris Lockharti (Hook. & Grev. ) Kunze, Glen Island, r sse- 

 quibo River, Demerara, British Guiana, Jenman. About one third the natural size. 



with the stipes not bulbous, with the sporophyls about twice as- 

 tall as the sterile leaves and without intermediate forms : sporangia 

 in one row along each margin, without lip-cells, the annulus 4-10- 

 celled, rarely more; spores 32. 



