SCHIZ^A CEsE. 7 5 



ously pinnatifid, the younger ones with a few black hairs along 

 the margins; indusjum solitary, terminal, funnel-shaped, the 

 mouth expanded and slightly two-lipped, the receptacle in- 

 cluded. Winston County, Alabama (Peters).^ 



2. T. radicans Swz. Rootstock wiry, tomentose ; stipes 

 ascending, i' 3' long, naked or nearly so, usually broadly 

 winged ; fronds 2' 8' long, i' ij' wide, lanceolate or ovate- 

 lanceolate, bipinnatifid ; pinnae ovate, obtuse, the upper side of 

 the base parallel and appressed to the winged rachis, the lower 

 side cuneate ; divisions toothed or divided into linear lobes ; 

 indusia terminal on short lobes, tubular or funnel-shaped, the 

 mouth slightly two-lipped ; receptacle exserted little or very 

 much. (T. spectosum Willd.) Alabama, Tennessee, Kentucky. 



Family 3. SCHIZ/EACE/E Presl. 



Plant-body consisting of a short or creeping stem (rootstock) 

 bearing clustered or scattered leaves. Sporangia ovate or pyri- 

 form, provided with an apical ring, bursting longitudinally at 

 maturity. The family contains about ten genera, three of which 

 are represented in our region. 



Our genera may be distinguished as follows : 



1. Leaves twining; leaflets in pairs, palmate . . I. LYGODIUM. 

 Leaves erect or merely curled 2 



2. Sporophylls distinct from the grass-like leaves. 



III. SCHIZiEA. 



Sporophylls borne on the elongate lower pinnae of an ordi- 

 nary leaf II. ORNITHOPTERIS. 



I. LYCODIUM 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. Name from Gr. hvyoadrjS, flexible, alluding to 

 the scandent stems. Includes 25 species. 



EULYGODIUM. 



I. L. palmatum (Bernh.) Swz. Stipes slender, twin- 

 ing; fronds i 3 long, the short alternate branches or peti- 



