5DG I'iLicKS. (kkkns.) 



14. NEPHROLEPIS, S.l.ott. 



Fruit-dots lit llic end-; of the veins, in a series near tiie niarjjjin of tlie pinnu:. 

 Indusiuni reniforni, often broadly so, fixed by tlie sinus, or l>y the areuate base, 

 o])eii oi)li(iuely toward the niar;;iii of tlic itinntE. Fronds |)innatc, eloii<j;atcd ; 

 tlic ])iiina; artieuhitcd to tiic rachis. Veins free, forked from the midrib, their 

 ajjiees thiekened. 



1. N. exaltata, Schott. Fronds linear, indefinitely elongated, unfolding 

 numerous pinna;, wliieh are oblong-laneeolatc, auriculatc on the upper side of 

 the base, rounded on the lower side, fakatc, crcnately serrate ; fruit-dots large ; 

 indusiuni reniform or creseent-shaped, the oblicpie sinus nanow and deep or 

 broad and shallow on the same pinna;. — Soutii Florida, Dr. Cooper. — Fronds 

 1°-G° long, 2' -3' wide, usually pendent from the trunks of trees. 



15. ONOCLEA, L. 



Fertile fronds contracted, the pinnules strongly revolutc and berry -like ; fruit- 

 dots on the back of the free veins, with an elevated receptacle ; indusium attadicd 

 partly to the receptacle and partly to the intcrvcnular surface. Sterile fronds 

 foliaccous, much taller than the fertile ones. 



1. O. sensibilis, L. Sterile fronds on a long smootli stipe, broadly 

 deltoid-ovate, jiinnatifid almost or quite to the rachis ; the divisions lanceolate, 

 entire or crcnately incised ; veins finely reticulated with oblong-hexagonal 

 areolcs ; fertile fronds shorter, bipinnate ; pinna; erect, apprcsscd to the raciiis ; 

 the pinnules crowded. — Meadows and wet places, Florida to Mississippi, and 

 northward. — Rootstock nearl}' naked, creeping. Fronds varying from four 

 inches to three foet in height. 



16. WOODSIA, R. Brown. 



Fruit-dots on the back of the veins ; the involucres placed beneath the fruit- 

 dot, saucer-shaped or cup-shaped, divided into irregular lobes or a delicate 

 fringe, or sub-globose and contracted at the mouth. Small Ferns with many 

 fronds from a short scaly rootstock. 



* Involucre fringed, the Iiair-like divisions incurved on the sporarufia. 



1. "W. Ilvensis, R Brown. Fronds sparingly hairy above, villous be- 

 neath and on tiie stipe and rachis with brown hairs and narrow chaff, lanceolate, 

 pinnate ; pinna; ovatc-oblong, deeply pinnatifid, the divisions oblong, obtuse, 

 entire or crcnate. Fruit-dots cnvelo])cd in the fringe of the involucre. — Rocks 

 along the Alleghany Mountains, and northward. — Fronds 3' -8' iiigh. 



* * Involucre divided into a few irregular lohes. 



2 "W. obtusa, Torr. Fronds nearly smooth, broadly lanceolate, pinnate, 

 or near the rachis bipinnate ; pinna; triangular-ovate, the lower ones distant, 

 pinnately parted ; segments oblong, obtuse, the upper ones toothed, the lower 

 ones pinnatifid with toothed lobes; veins forked, the tips whitish on the upper 

 surface of the frond ; fruit-dots on the lobules ; involucre delicate, the lobes 



