30 NORTH AMERICAN FLORA [VorumE 16 
simple, ovate or deltoid, in the following leaves 3-7-lobed and broadly rhombic to pen- 
tagonal, the lobes deltoid, acute; mature sterile leaves taller, erect, 25-50 cm. long, the 
stipes 10-20 cm. long, flattened, the lamina deltoid, acute, 20-35 cm. long, 15-25 cm. broad, 
2-pinnate-pinnatifid, the lowest with 5-8 pairs of pinnae, broadly deltoid, 9-12 cm. long, 
9-14 cm. broad, the ultimate segments lanceolate to deltoid, 3-4 cm. long, 0.5-3 cm. broad, 
acute; sporophyls 40-65 cm. long, the stipes flattened, the lamina deltoid, 30-40 cm. long, 
25-37 cm. broad, 4 times pinnately divided, the ultimate segments linear, 0.5-2 cm. long, 
0.5-2 mm. broad; sporangium with well-developed annulus (40-50-celled) and lip-cells - 
spores 16, 
TYPE LOCALITY: Orange Bay River, Jamaica. 
DISTRIBUTION: Florida and Louisiana; Porto Rico; Jamaica; also in South America (?). 
ILLUSTRATION : Bull. Torrey Club 36: 473. f 3. 
3. Ceratopteris pteridoides (Hook.) Hieron. Bot. 
Jahrb. 34: 561. 1905. 
Parkeria pleridoides Hook. Exot. Fl. 147. 1825. 
Ceratopteris Parkeria J. Smith, Jour. Bot. Hook. 4: 70. 1841. 
Plants floating, or partly submerged and rooted in soil; leaves in the floating plants 
up to 25 cm. long, the stipes expanded midway, bulbous; lamina in earliest sterile leaves 
simple, ovate or deltoid, in following leaves broadly 3-lobed, deltoid or rhombic, in still 
later leaves pentagonal, 6-20 cm. long, 6-20cm. broad, 1~3 times pinnatifid, with 2-4 pairs of 
primary divisions, the ultimate segments broadly ovate or deltoid, usually blunt or rounded ; 
lamina in succeeding leaves 2-4 times divided with narrowly oblong, rounded segments, 
grading into the slightly taller sporophyls with linear segments; leaves in the anchored 
plants as above but with the stipes not bulbous, with the sporophyls about twice as tall as 
the sterile leaves, up to 40 cm. long, and without intermediate forms; sporangia in one row 
along each margin, without lip-cells, the annulus 4-10-celled, rarely more ; spores 32. 
TYPE LOCALITY: Essequibo, British Guiana. 
DISTRIBUTION : Florida and Cuba ; also in Brazil and Guiana. 
ILLUSTRATIONS: Hook. Joc. cit.; Hook. & Grev. Ic. Fil. pl. 97. 
