Trichomanes, Lygodium, Aneimia. 97 



rpargins ; indusium solitary, terminal, funnel-shaped, the mouth 

 expanded and slightly two-lipped, the receptacle included. Ala., 

 Fla. VI. 



2. T. radicans, Swz. Rhizoma wiry, tomentose ; stipes as- 

 cending, i'— 3' long, naked or nearly so, usually broadly winged ; 

 fronds 3' — 8' long, 1' — i^' wide, lanceolate or ovate-lanceolate, 

 bipinnatifid; pinnae ovate, obtuse, the upper side of the base par- 

 allel and appressed to the winged rachis, the lower side cuneate ; 

 divisions toothed or divided into linear lobes'; iudusia terminal on 

 short lobes, tubular or funnel-shaped, the mouth slightly two- 

 lipped; receptacle exserted little or very much. Ala., Tenn., 

 Ky. VI. 



XXVI. LYGODIUM, Swz. Climbing-fern. 



Sporangia ovoid solitary or occasionally in pairs, in the axils 

 of large imbricated scale- like indusia, which are fixed by their 

 broad bases to short oblique veinlets. Fronds scandent, twining, 

 bearing stalked and variously lobed divisions in pairs. Veins 

 mostly free. 



I EULYGODIUM. 



I. L. palmatum,* Swz. Stipes slender, flexile and twining ; 

 fronds 1° — 3° long, the short alternate branches or petioles 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 ; texture thinly herbaceous. Mass. 

 and N. Y. to Ky. and Fla. III. 



XXVII. 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. 



I EUANEIMIA. 



1. A. adiantifolia, Swz. Rhizoma creeping; stipes 1° — 1}4,° 

 long, firm, naked ; fronds sparingly pubescent, the two lower 

 branches elongated, pinnately decompound, fertile ; sterile por- 

 tion deltoid-ovate, bi — tripinnate ; ultimate segments obovate or 

 cuneate, entire or lobed, striate above with numerous flabellate 

 veins. Fla. VI. 



2. A. Mexicana, Klotzsch. Rhizoma creeping, covered with 

 narrow blackish chaff; stipes slender, scattered, 6' — 12' long; the 



ID— 



