.'598 FiLiCES. (ferns.) 



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

 common foot-stalk. 



1- L. palmatum, Swartz. Fronds slcmU'r, iiinn.x deeply rordatc at the 

 base, pahuately 4 - 7-lobcd, the lobes oblong, obtuse, entire ; the ujjper pinnie 

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

 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 nanow one-sided paniculate divisions of the t»vo lower branches of 

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

 tliree-branched, the middle branch sterile and 1 -.'5-pinnate. 



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

 dvr stijjc ; the two lower branches elongated, pinnately decompound, fertile ; 

 sterile part of the frond deltoid-ovate, 2-3-i)innate ; ultimate segments obovate, 

 cuneate, entire or lobed, striate above with numerous flabellate veins. — Key 

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

 ing, slender, covered with a black tometitmn. 



21. OSMUNDA, L. Yunw.niso Ters. 



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

 represented by a few parallel stri;c near tlic apex, opening by a vertical chink 

 into two nearly equal valves, paniculatcly arranged on contracted jtarts of the 

 frond or on sejjaratc fronds. FiTiiids tall, erect, several from a stout rootstock, 

 1 -2-piniiate. Veins forking, free. 



* Fronds hijnnnate,f<;rtile at the top; sterile pinna few. 



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

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

 sessile base, sometimes auricled at the lower side of the base ; the upi)er pinnae 

 erect, panicled and thickly covered with light brown sporangia. (O. spectabilis, 



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

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



* * Sterile fronds pinnate : the pinmn numerous, de<'j>li/ pinmitifid, irith ohloiuj entire 



segments. 



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

 at length nearly smooth ; sterile pinnae sessile, ol)long-lanccolate, deeply pinna- 

 tilid ; the segments crowded ; fertile ])inna3 few, between the middle and the base 

 of the frond, contracted, the sporangia deepening in color as the sterile pinnre 

 expand. (O. intcrrupta, Mn-hr.) — Low grounds in the upper districts, and 

 northward.— Fronds 2° -3° iiigh. 



3. O. cinnamomGa, L. Sterile fronds corcrvd with rusty wool when 

 young, at length smootli ; pinna: sessile, lanceolate ; BCgmcnts broadly oblong, 



