592 FILICE3. (ferns.) 



Var. Ciissslliiitia. Frond somewhat more coriaceous ; the pinnules with 

 narrower and less crowded lobes, the terminal one linear and prolonged (l'-2' 

 in length), entire, forming a tail-like termination, or the whole of many of the 

 pinnules sometimes linear and entire. (P. eaudata, L.) — Common southward, 

 and at the north varying into the typical form. 



5. ADIAIVTUffl, L. Maidenhair. (Tab. 10.) 



Fruit-dots marginal, short; borne on the under side of a transversely oblong, 

 crescent-shaped or roundish, more or less altered margin or summit of a lobe or 

 tooth of the frond reflexed to form an indusium : the sporangia attached to the 

 approximated tips of the free forking veins. — Main rib (costa) of the pinnules 

 none, or at one margin. Stalks black and polished. (The ancient name, from 

 a privative and biaivto, meaning unwelted, the smooth foliage repelling rain-drops.) 



1. A. jpedsktBSBlB, L. Frond forked at the summit of the upright slender 

 stalk (9' -15' high), the forks pedately branching from one side into several 

 • slender spreading divisions, which bear numerous triangular-oblong and oblique 

 short-stalked pinnules ; these are as if halved, being entire on the lower margin, 

 from which the veins all proceed, and cleft and fruit-bearing on the other. — 

 Rich, moist woods. July. — A delicate and most graceful Fern. 



6. CHE3LAMTI1ES, Swartz. Lip-Fern. (Tab. 10.) 



Fruit-dots small and roundish, solitary or contiguous next the margins or tip9 

 of the lobes, which are recurved over them to form a hood-like (herbaceous or 

 membranaceous) indusium; the sporangia borne on the tips of free forking 

 veins. — Fronds 1 - 3-pinnate, the sterile and fertile nearly alike; the divisions 

 not halved, the main rib central. (When the indusium becomes continuous, the 

 genus passes into Allosorus.) (Name composed of xe' A °s, a Mp> an( * &v0os, 

 flower, from the shape of the indusium.) See Addend. 



1. C. veStiJa, Willd. (not of Hook.?) Fronds 2-pinnate (slender, 4'-7 

 high), and stalks hirsute with loose and rather scattered rusty hairs; pinnules ob- 

 long, pinnatifid (2" -4" long), their lobes oval or oblong, the recurved portion 

 forming the indusium herbaceous. — Shaded rocks, S. Penn., Virginia, Ken- 

 tucky, and southward. — Fronds soon nearly glabrous above. 



2. C. tomenatosa, Link. Fronds (1°-1|° high) with the rather stout 

 stalk, &c. densely woolly and villous throughout (the upper surface becoming smooth- 

 ish with age), thrice pinnate ; pinnules obovate or roundish, nearly entire, sometimes 

 confluent, the recurved narrow margins forming an almost continuous involucre. 

 (Nephrodium lanosum, Michx. in part ?) — Mountains of Virginia? Kentucky; 

 thence westward and southward. 



7. WO0DWAKDIA, Smith. Woodwardia. (Tab. 10.) 



Fruit-dots oblong or linear, approximate or contiguous, parallel to and near 

 the midrib, on transverse anastomosing veinlets, in one or rarely two rows ; the. 

 veins reticulated towards the midrib, mostly forking, free towards the margin of. 



