Part 1, 1909] SCHIZAEACEAE 37 
2-10 cm. in the substratum, above green and gradually flattish, lightly canaliculate upon 
the upper surface, about 2 mm. broad, strongly and often sharply costate below, thus 
unequally triquetrous nearly throughout, lustrous, glabrous; fertile segments 6-14, penicil- 
late, 24.7 cm. long, 1 mm. or more broad, acuminate, at first erect and close, eventually 
subfalcate and divergent, unequal, the uppermost and lower ones shorter than the middle 
ones and sometimes dichotomous ; sporangia very numerous, spuriously biseriate upon each 
side of the conspicuously rusty-pilose costa; spores closely and delicately maculate. 
TYPE LOCALITY: Tropical America. 
DISTRIBUTION: Costa Rica; Guadeloupe ; also Trinidad to Uruguay. 
ILLUSTRATIONS: Hook. Joc. cit.; Schkuhr, loc. cit. pl. 136; Hook. & Grev. Ic. Fil. pl. 54; 
Duperrey, Voy. p/. 27 (as S. penicillata). 
3. SCHIZAEA Smith, Mém. Acad. Turin 5: 419. 1793. 
Fronds usually numerous, cespitose, erect or ascending (or the sterile ones recurved or 
tortuous), simple, linear or filiform, terete at the base, above flat or flattish (rarely semi- 
terete), unicostate, or in a few species once or several times dichotomous, the divisions 
slender, elongate, unicostate, distant, scarcely divaricate, never forming a definite lamina. 
Sporangiophores terminal, the segments (5-23 pairs) pinnately arranged upon a rachiform 
continuation of the costa and not exceeding it in length, often much shorter. Sporangia in 
2 close rows along the costa of the segments, partially protected by the narrowly reflexed 
indusiiform margin. 
Type species, Acrostichum pectinatum L. 
1. Schizaea pusilla Pursh, Fl. Am. Sept. 657. 1814. 
Plants densely fasciculate, the rhizomes minute and short-creeping ; fronds linear, the 
sterile ones numerous and intricately entangled, 2-7 cm. long, about 0.5 mm. broad, ascend- 
ing, recurved and tortuous, flattish and slightly concave above, convex below, finely 
striate ; fertile fronds rigidly erect, 4-15 cm. long, far exceeding the sterile fronds, a little 
thicker, straight or flexuous; sporangiophore ovate, conduplicate, the segments (3-8 pairs) 
oblique, 4-9 mm. long, linear-oblong, obtuse, strongly concave (the apex cucullate), the 
upper ones greatly reduced, the costa and margins rusty-pilose ; sporangia close, 4-9 pairs ; 
spores minutely areolate. 
TYPE LOCALITY: New Jersey. 
DISTRIBUTION: Pine barrens of central and eastern New Jersey, usually in sphagnum ; Nova 
Scotia; Newfoundland. 
ILLUSTRATIONS: Hook. & Grev. Ic. Fil. p/. 48; D. C. Eaton, Ferns N. Am. #/. 24, 7.3; Britt. 
& Brown, Hl. Fl. f. 22. 
4. LOPHIDIUM Rich. Act. Soc. Hist. Nat. Paris 1: 114. 1792. 
Fronds cespitose, erect, stipitate, once to repeatedly dichotomous, the divisions usually 
numerous, linear and flattish, or broader and conspicuously foliose, unicostate or pluricos- 
tate, forming a definite flabelliform lamina. Sporangiophores terminal upon the excurrent 
costae of the leafy divisions or rarely upon special nonfoliose fronds of similar form ; 
fertile segments simple or dichotomous, borne in a pinnate spike, not longer than the rachis 
of the sporangiophore. Sporangia in two rows close to the costa, crowded, somewhat pro- 
tected by the recurved indusiiform margin. 
Type species, Lophidium latifolium Rich. 
Fronds similar. 
Fronds stout, rigidly erect; segments numerous, mostly 1-3cm. broad. 1. L. elegans. 
Fronds weak, slender ; segments few, 1-3 mm. broad. 2. L. fluminense. 
Fronds strongly dimorphous. 3. L. Poeppigianum. 
1. Lophidium elegans (Vahl) Presl, Abh. Bohm. Ges. 
Wiss. V. 4: 337. 1845. 
Acrostichum elegans Vahl, Symb. 2: 104. 1791. . 
Lophidium latifolium Rich. Act. Soc. Hist. Nat. Paris1: 114. 1792. 
Schizaea elegans Smith, Mém. Acad. Turin 5: 419. 1793. 
? Schizaea Flabellum Mart. Ic. Crypt. Bras. 115. 1834. 
? Lophidium Flabellum Presl, Abh. BGhm. Ges. Wiss. V. 4: 337. 1845. 
