567 
9. WOODWARDIA Smith. 
Sori oblong or linear, sunk in cavities in the frond and arranged in 
chain-like rows parallel to the midribs of the pinne and segments 
and near them: indusia somewhat firm, fixed by the outer margin to 
the veinlets and covering the sori like lids: veins more or less uniting. 
1. W. Virginica (L.) Smith. Stipes stout, rising from a thickish rootstock, 3 to 
5 dm. long: sterile and fertile fronds uniform, oblong-lanceolate, 3 to 5 dm. long, 
1.5 to 2 dm. wide, bipinnatifid with linear-oblong lobes; veins free between the 
sori and the margins.—Texas ( Wright). 
W. areolata(L.) Moore (WW. angustifolia Sm.), with dimorphous fronds, is to be looked 
for in the state. 
10. DRYOPTERIS Apans. (SHIELD-FERN.) 
Sori round, borne on the back or rarely at the apex of the veins: 
indusium flat or flattish, orbicular and peltate at the center or cordate- 
reniform and fixed either centrally or at the sinus. (Aspidiwm Swz.) 
—Large ferns of rich woods and swamps. 
§ 1. Veins anastomosing copiously: fronds large, trifoliate in our species,—ASPIDIUM. 
1. D. trifoliata (L.) Kuntze. Stipes cespitose, 3 to 5 dm. long, brownish,scaly at 
base: fronds 3 to 4.5dm. long, 1.5 to3dm. wide, with a large ovate acuminate central 
pinna, and one or two lateral oneson each side; primary veins distinct to the margin, 
with fine copious areolae: sori in rows near the main veins; indusia orbicular, pel- 
tate.—Entrance to a limestone cave near New Braunfels (Lindheimer, 1878). 
§ 2. Veinlets uniting slightly near the margin: indusium peltate: fronds simply pinnate 
with broad pinne.—CYRTOMIUM Presl. 
2. D. juglandifolia (H BK.) Kuntze. Stipes cespitose, clothed below with large 
scales: fronds 1.5 to 6dm. long, of leathery texture; pinne 2 to 12 pairs, short-stalked, 
ovate-oblong to broadly lanceolate, the terminal one distinet, and in small fronds 
the largest: soriscattered in several irregular rows.—‘* Hueco tanks and Van Horn’s 
well,” El Paso County? (Mex, Boundary Survey), but not since collected in the 
State. 
§ 3. Veins free: indusium cordate-reniform with narrow sinus.—NEPHRODIUM Rich. 
3. D. patens (Swz.) Kuntze. Rootstock rather stout, bearing several fronds at its 
growing end: fronds6to9dm., long, 1to2.5 dm. wide,ovate-oblong, pubescent beneath ; 
pinne close, linear-acuminate, the lowest pair somewhat deflexed, all cut three- 
fourths the way to the middle; segments numerous, the basal ones longer; lowest 
veinlets of adjacent segments often uniting: indusia very pubescent.—Western Texas 
(Wright, Lindheimer), Hockley, Harris County (Thurow). 
4. D. Thelypteris (L.) Gray. Rootstocks slender: fronds 3 to 6dm. long, 5 to8 
em. wide, lanceolate with horizontal linear-lanceolate pinnw; segments oblong, 
entire, obtuse or appearing acute in fertile fronds from the revolute margins; veins 
mostly forked, bearing the sori near the middle: indusia minute, smooth and naked,— 
In bogs, Hempstead, Waller County (/fal/, erroneously distributed as A. Novebora- 
censis). 
