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. ANEIMIA Swz. 



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

 the very narrow branchlets 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. avainiac, bloodless. A 

 small genus chiefly from tropical America, containing 27 species. 



EUANEIMIA. 



1. A. adiantifolia Swz. Rootstock creeping; stipes i 

 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. SCHIZ/EA 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. (TX^IV, 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, 



