FILICES. 123 



oles 2-forked, each fork bearing a round-cordate palmately 

 4 7 lobed pinnule; fertile pinnules above, contracted, several 

 times forked, forming a terminal panicle ; surfaces naked ; text- 

 ure thinly herbaceous. (Hydroglossum palmatum Willd.) Mas- 

 sachusetts and New York to Kentucky and Florida. 



XXVIII. ANEMIA Swz. 



Sporangia ovate, sessile, placed in two rows on the back of 

 the very narrow branch lets of the two long-stalked, panicled, 

 lower branches of a pinnately divided frond, the fertile branches 

 in a few species entirely distinct from the sterile frond. Veins 

 free or anastomosing. Name from Gr. aye^cov t naked. A 

 small genus chiefly from tropical America, containing 27 species. 



EUANEMIA. 



1. A. adiantifolia (L.) Swz. Rootstock creeping ; stipes 

 i^ long, firm, naked ; fronds sparingly pubescent, the two 

 lower branches elongate, pinnately decompound, fertile ; ster- 

 ile portion deltoid-ovate, bi tripinnate ; ultimate segments ob- 

 ovate or cuneate, entire or lobed, striate above with numerous 

 flabellate veins. Florida. 



2. A. Mexicana Klotzsch. Rootstock creeping, covered 

 with narrow blackish chaff; stipes slender, scattered, 6' 12' 

 long; the two lower branches of the frond fertile, long-stalked, 

 glandular, bipinnate with densely clustered fructification ; the 

 rest of the frond like the sterile ones, deltoid-ovate, simply pin- 

 nate ; pinnae about six pairs and a rather large terminal one, 

 short-stalked, ovate-lanceolate, subcoriaceous, smooth and 

 somewhat glossy; midrib distinct, veins free, oblique, parallel, 

 closely placed, once or twice forked. Western Texas. 



XXIX. SCHIZJEA Sm. 



Sporangia large, ovoid, striate rayed at the apex, naked, ver- 

 tically sessile in a double row along the single vein of the nar- 

 row divisions of the fertile appendages to the slender and sim- 

 ply linear, fan-shaped, or dichotomously many-cleft fronds. 

 Name from Gr. o-^eiv, to split, alluding to the forked sterile 

 fronds of foreign species. Includes 16 species. 



EUSCHIZ/EA. 



i. S. pusilla Pursh. Sterile fronds linear, very slender, 

 flattened and tortuous; fertile ones equally slender, 3' 4' high, 



