gS Our Native Ferns. 



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 pinnate ; pinn?e 

 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 Tex. V. 



XXVIII. SCHIZiEA, Sm. 



Sporangia large, ovoid, striate rayed at this apex, naked, verti- 

 cally sessile in a double row along the single vein of the narrow 

 divisions of the fertile appendages to the slender and simply 

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



I EUSCHIZ^A. 



I. S. pusilla,* Pursh. Sterile fronds linear, very slender, flat- 

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

 bearing at top the fertile appendage consisting of about five pairs 

 of crowded pinnae, forming a distichous spike. N. J., N. S., New- 

 foundland (?). III. 



XXIX. OSMUNDA, L. Flowering-fern. 

 Fertile fronds or fertile portions very much contracted, bearing 

 s hort pedicelled, naked sporangia on the margins of the rachis- 

 like divisions. Sporangia globular, large, opening by a longitu- 

 dinal cleft into two halves, bearing near the apex a few parallel 

 striae, the rudiment of a transverse ring. Spores green. 

 * Fronds bipinnate, fertile at the apex. 



1. O. regalis, L. Stipes tufted 1° — x]4.°, erect, naked; fronds 

 2° — 4° long, 1° or more broad ; sterile pinnag 6' — 12' long, 2' — 4' 

 broad ; pinnules oblong-oval to lance-oblong, sessile or slightly 

 stalked; the fertile pinnules cylindrical, panicled; texture .sub- 

 coriaceous ; rachis and both sides naked. Canada to Fla. and 

 Miss. III. 



** Sterile fronds bipinjiatifid. 



2. O. Claytoniana, L. Stipes tufted 1° or more long, clothed 

 with loose woolly tomentum when young, naked when mature ; 

 fronds 1° — 2° long, 8'— 12' broad; pinnae oblong-lanceolate with 

 oblong, obtuse divisions ; 2—5 pairs of central pinnae fertile ; fer- 

 tile pinnules dense, cylindrical ; texture herbaceous. Canada to 

 Ky. and northward. III. 



3. O. cinnamomea, L. (Cinnamon-fern.) Stipes densely 

 tufted, 1" or more long, the sterile and fertile fronds distinct; 



