628 FILICES. (FERNS.) 



1. B. serrulatum, Michx. Fronds erect, rigid, pinnate ; pinna articii 

 lated with the rachis; fertile ones linear-lanceolate, acute, finely and sharplv 

 serrate ; fruit close to the midrib ; sterile ones broader, bearing a few chaff v 

 scales along the midrib. South Florida. 



11. WOODWARDIA, Smith. 



Fruit-dots linear-oblong, in one or two series on transverse anastomosing 

 veinlets parallel and near to the midrib. Indusium attached by its outer mar- 

 gin to the veinlet, opening inward. Veins more or less reticulated, free toward 

 the margin of the frond. Fronds mostly pinnatifid or pinnate. 



1. W. angustifolia, Smith. Fronds smooth, piunatifid ; the sterile ones 

 ovate, with broadly lanceolate finely serrate divisions, united at the base and 

 decurrent on the stipe, the veins reticulated in several series of areoles ; fertile 

 fronds taller, with narrowly linear entire divisions, and a single series of elon- 

 gated areoles, each containing an oblong fruit-dot with a vaulted indusium. 

 Bogs and shady banks. Rootstock creeping, elongated, as thick as a goose- 

 quill. Stipe 6'- 12' high, about the length of the frond. 



2. W. Virginica, Willd. Fertile and sterile fronds alike, ovate, smooth, 

 pinnate ; pinnse lanceolate, narrowed at both ends, pinnatifid ; segments oblong, 

 obtuse ; veins forked, forming a single series of areoles along the midrib both 

 of the pinna} and of the segments ; areoles fruit-bearing in the fertile frond. 

 Shallow ponds. Rootstock as thick as one's finger, creeping, elongated, 

 with a tough black exterior, the interior soft and white. Fronds l-4 high ; 

 stipe smooth. 



12. CAMPTOSORUS, Link. WALKING-LEAF. 



Fruit-dots linear or oblong, straight or curved, scattered irregularly on the 

 back of the frond, often opposite in pairs, or converging and united. Indusium 

 linear, attached by one margin to the reticulated veins of the simple frond. 



1. C. rhizophyllus, Link. Fronds evergreen, lanceolate, cordate or 

 hastate at the base, long-acuminate, often rooting at the extremity and giving 

 rise to new plants. (Asplenium rhizophyllum, L.) Shaded rocks on the 

 mountains of Georgia, and northward. Fronds 4' - 10' long. 



13. ASPLENIUM, L. SPLEENWORT. 



Fruit-dots oblong or linear, oblique to the midrib, the indusium attached hy 

 one margin to the mostly free veins, rarely curved, or double and attached to 

 both sides of the vein. 



1. ASPLENIUM proper. Indusia straight, attached by their whole length to 

 the upper side of the vein ; rarely some of them double, and placed back 

 to back. 



* Fronds undivided. 



1. A. serratum, L. Frond entire, acute, long-tapering at the base, 1- 

 2 long, the margins wavy and serrate ; sori linear, on the lower third of the 

 veins. Eastern coast of South Florida (Garber, Curtiss). Stipe short and 

 rigid. 



