598 FILICES. (FEKNS.) 



cal ring. Fronds elongated, climbing, the branches usually in pairs with a short 

 common foot-stalk. 



1 ■ L. palmatum, Swartz. Fronds slender, pinna deeply cordate at the 

 base, palmately 4-7-lobcd, the lobes oblong, obtuse, entire; the upper pinnce 

 decompound and bearing the fruit on the very narrow segments. — Low shady 

 woods, Florida, and northward ; not common. — Rootstock very slender, creep- 

 ing. Fronds 2° - 5° high, climbing on weeds and bushes. 



20. ANEIMIA, Swartz. 



Sporangia ovate, many-rayed at the apex, attached by the base in a double 

 row to the narrow one-sided paniculate divisions of the two lower branches of 

 the frond, or on separate fronds. Indusium none. Fronds erect, commonly 

 three-branched, the middle branch sterile and 1 -3-pinnatc. 



1. A. adiantifolia, Swartz. Fronds sparingly pubescent, erect on a slen- 

 der stipe; the two lower branches elongated, pinnately decompound, fertile; 

 sterile part of the frond deltoid-ovate, 2-3-pinnate; ultimate segments obovate, 

 eimeate, entire or lobed, striate above with numerous flabcllate veins. — Key 

 West, &c, South Florida. — Fronds 6'- 12' high, rather rigid. Rootstock creep- 

 ing, slender, covered with a black tomentum. 



21. OSMUND A, L. Flowering Fern. 



Sporangia globular, short-pedicelled, having an incomplete transverse ring, 

 represented by a few parallel stria; near the apex, opening by a vertical chink 

 into two nearly equal valves, paniculately arranged on contracted parts of the 

 frond or on separate fronds. Fronds tall, erect, several from a stout rootstock, 

 1-2-pinnate. Veins forking, free. 



* Fronds bi pinnate, fertile at the top; sterile pinmcf ir. 



1. O. regalis, L. Fronds ovate, smooth ; sterile pinnae distant ; the finely 

 serrulate pinnules distinct, oblong-lanceolate, cordate or truncate at the nearly 

 sessile base, sometimes auricled at the lower side of the base ; the upper pinna 1 

 erect, panicled and thickly covered with light brown Bporangia. (< ». spectabilis, 



Willd.) — Swamps, Florida to Mississippi, and northward. — Fronds l°-5° 

 high ; pinnules 1'- 2' long, 3" -4" wide. 



* * Sterile fronds pinnate: the pinna numerous, deeply pitmatijid, with oblong entire 



segmi nt*. 



2. O. Claytoniana, L. Fronds broadly lanceolate, woolly when young, 

 at lengtb Dearly smooth ; Bterile pinnae sessile, oblong lanceolate, deeplj pinna- 

 tifid ; the segments crowded ; fertile pinna- few, between the middle and the base 



of the frond, contracted, the Bporangia deepening in color as the sterile pinna; 



expand. (0. interrnpta, Michx.) — Low grounds in the upper districts, and 



northward.— Fronds 2° -3° high. 



.'i. O. cinnamomca, L. Sterile fronds covered with rusty wool when 

 young, at Length smooth j pinna sessile, lanceolate; segments broadly oblong, 



