474 SCHIZAEACEAE. 



2. Nephrolepis biserrata (S\v.) Schott, Gen. Fil. under p7. 3. 1834. 



Poly podium biserratum Sw. in Schrad. Journ. Bot. 1800 2 : 32. 1801. 



Similar to the preceding species, the petioles 10-20 cm. long, the leaf- 

 Mades up to 1.2 m. long. Pinnae lanceolate, sessile, acute or acuminate, serru- 

 late, crenulate or entire, 10-20 cm. long, 10-18 mm. wide, the base subtruncate 

 or auricled on the upper side, rounded on the lower; sori close to the margin, 

 the indusia nearly orbicular. 



In a cave. East Caicos, with the preceding species : Florida ; West Indies ; 

 Central America. Sword Fern. 



Family 2. SCHIZAEACEAE Reichenb. 



Ferns of various habit, with simple or pinnate leaves. Sporanges 

 borne in spikes or panicles, on modified leaves or leaf-segments, ovoid, 

 sessile, provided with an apical ring, opening vertically by a longitudinal 

 slit. Several genera and about 100 species, mainly tropical. 



1. ANEMIA Sw. Syn. Fil. 6, 155. 1806. 



Small to medium-sized ferns, mostly with horizontal or creeping rootstocks, 

 the leaves distichous or tufted, pinnatifid or decompound, often dimorphous 

 (the sterile ones quite different from those bearing sporanges). Venation 

 mostly free. Sporanges borne in a single row on the margins of the ultimate 

 segments of fertile pinnae, with or without an indusium. [Greek, wind.] 

 Thirty species or more, of tropical and subtropical America. Type species: 

 Anemia Phyllitidis L. 



Leaves wholly fertile or wholly sterile. 



Segments of sterile leaf obovate, cuneate. 1. A. Wrightii. 



Segments of sterile leaf rhombic-ovate or rhombic-oblong. 2. A. cicutaria. 



Only the basal segments of the leaf fertile. 3. A. adiantifolia. 



1. Anemia Wrightii Baker in Hook. & Baker, Syn. Fil. 435. 1868. 



Ornithopteris Wrightii Millsp. Field Col. Mus. Bot. 3: 14. 1903. 



Eootstock creeping, finely hairy. Leaves membraneous, dimorphous. Sterile 

 leaves 5-12 cm. long, with slender straw-colored stipes 3-7 em. long, the blade 

 ovate or rhombic-ovate in outline, 2.-4: cm. wide, sparingly pilose; pinnae 3 or 

 4 pairs, ascending, rather distant; ultimate leaf -segments obovate, cuneate, 

 dentate or incised at the apex, or entire. Fertile leaves about twice as long as 

 the sterile ones, their stipes much longer than the panicles of sporanges. 



In a sink-hole, coppice near Fresh Creek, Andros : Cuba. A little-collected 

 plant, perhaps not specifically distinct from the following species. Wright"s Axemia. 



2. Anemia cicutaria Kunze; Spreng. Syst. 4: 31. 1834. 



Anemia bipinnata Moore, Index Fil. cxvi. 1857. 



Ornithopteris cicutaria Underw. Mem. Torr. Club 12: 15. 1902. 



Eootstock short, densely brown-hairy. Leaves membranous, dimorphous. 

 Sterile leaves 1.5 dm. long or less, the slender, straw-colored stipes about as 

 long as the blades or shorter ; blades deltoid-ovate in outline, 2-3-pinnate, with 

 3-7 pairs of pinnae, the ultimate segments rhombic-ovate or rhombic-oblong, 

 dentate or incised above. Fertile leaves much longer than the sterile ones, 

 their stipes longer than the panicles of sporanges. 



In sink-holes, Abaco, Andros, Xew Providence : Cuba ; Yucatan. Parsley Axemia. 



