10 FLORA. 



ovate-lanceolate in outline, 5-10 cm. long, 2.5-5 cm - wide, 3-pinnate or 2-pinnate 

 with the pinnules pinnatifid, the upper surface slightly tomentose, the lower densely 

 matted with whitish-brown woolly hairs; upper pinnae oblong-ovate, the lower 

 deltoid, the lowest distant; ultimate segments or lobes minute, the terminal ones 

 slightly larger than the others, all roundish or obovate and much crowded; indusium 

 narrow. On rocks, 111., to Br. Col., Tex. and Ariz. (C, gracilis Mett.) 



4. Cheilanthes tomentosa Link. (I. F. f. 69.) Rootstock stout, short, 

 densely chaffy with light brown scales. Stipes tufted, 1-2 dm. long, rather stout, 

 densely brown -tomentose even when mature; leaves oblong-lanceolate in outline, 

 3-pinnate, 1.5-4.5 dm. long, densely tomentose, especially beneath, with slender 

 brownish- white obscurely articulated hairs; pinnse and pinnules ovate-oblong or 

 oblong-lanceolate, the ultimate pinnules about I mm. long, the terminal ones some- 

 times twice as large as the others; indusium pale, membranous, continuous. On 

 rocks, Va. to Ga., west to Mo., Tex., Ariz, and Mex. 



8. LORINSERIA Presl. CHAIN-FERN. 



Medium-sized ferns of swamps with dimorphous pinnate leaves, and linear sori 

 sunk in cavities of the leaf, arranged parallel to the midribs. Indusia subcoriaceous, 

 fixed by their outer margins to a veinlet and covering the cavity like a lid. Veins 

 copiously reticulated. Only the following species. [Named in honor of Dr. Gus- 

 tav Lorinser, a Bohemian physician and naturalist.] 



i. Lorinseria areolata (L.) Underw. (I. F. f. 43.) Rootstock slender, 

 creeping, chaffy. Leaves of two kinds, the fertile taller than the sterile and borne 

 on longer stipes, 3-6 cm. high, their pinnse narrowly linear; sterile leaves deltoid- 

 ovate, membranous, the segments lanceolate or oblong-lanceolate, minutely serru- 

 late or undulate, their bases connected by a rather broad rachis-wing. Tn swamps, 

 Me. to Fla., La. and Ark.; also in Mich. (Woodwardia areolata (L.) Moore.) 



8a. ANCHISTEA Presl. CHAIN-FERN. 



Large coarse ferns of swamps or wet woods, with uniform nearly bi pinnate 

 leaves and oblong sori arranged in chain-like rows parallel to the midribs. In- 

 dusia fixed by their outer margins to a veinlet. Veins forming a single row of 

 areolse next the midrib, then free to the margin. Two species of the northern 

 hemisphere, the following and one of eastern Asia. [Greek, referring to its rela- 

 tionship to WoodiuardiaJ\ 



I. Anchistea Virginica (L.) Presl. (I. F. f. 42.) Rootstock stout, sub- 

 terranean, creeping, chaffy. Stipes stout, 3-4.5 dm. long, nearly or quite naked; 

 leaves oblong-lanceolate, acute at the apex, narrowed at the base, 5-6 dm. long, 

 1522 cm. wide; pinnae linear-lanceolate, glabrous, acuminate at the apex, sessile, 

 deeply pinnatifid into oblong obtuse segments with minutely serrulate margins; 

 sori 4 mm. long. In swamps, N. S. to Ont. and Mich., south to Fla., La. and 

 Ark. (Wood-war dia Virginica (L.) J. E. Smith.) 



9. ASPLENIUM L. SPLEENWORT. 



Large or small ferns with entire, lobed, pinnate, 2-3-pinnate, or pinnatifid 

 leaves, and linear or oblong sori oblique to the midribs or rachises. Leaves mostly 

 uniform. Veins free. Indusia straight or curved, opening towards the midribs 

 when single. Sporanges pedicelled, provided with an elastic ring, bursting ^trans- 

 versely. [Ancient Greek name ; some species were supposed to be remedies for 

 diseases of the spleen.] A genus of some 200 species, of very wide geographic 

 distribution. 



Sori -straight or rarely slightly curved, attached to the upper side of a vein; mostly small 



(except in No. 7). 

 Leaves pinnatifid or pinnate below, tapering to a point. 



Stipes blackish below ; lobes rounded or the lowest acuminate. 



i. A. pinnattfidum. 

 Stipes blackish throughout; lobes acute or acuminate. 2. A. ebenoides. 



