568 
11. WOODSIA R. Br. 
Sori round, borne on the back of simply forked free veins: indusium 
inferior, thin and often evanescent, small and open or early bursting at 
the top into irregular lobes.—Medium-sized ferns of rocky places. 
1. W. obtusa (Spreng.) Torrey. Stipes 8 to 15 em. long: fronds 1.5 to 4 dm. 
long, broadly lanceolate, nearly bipinnate; pinne rather remote, triangular-ovate 
or oblong, pinnately parted; segments obtuse, crenately toothed, the lower ones 
pinnatifid.—On banks, Hempstead, Waller County (Hall). 
12. ANEMIA Swz. 
Sporangia ovate, sessile, placed in two rows on the back of very 
narrow branchlets of the two long-stalked panicled lower branches of 
a pinnately divided frond.—Medium-sized ferns of rocky banks. 
l. A. Mexicana Klotzsch. Rootstalks creeping, covered with fine scales: stipes 
scattered, 1.5 to 3 dm. long: fronds simply pinnate, the lowest pair of pinnze elon- 
gated and. fertile, the others 4 to 8 cm. long, 1 to 1.5 m. wide, the lower in sterile 
fronds often lobed or auriculate on both sides at base.—“ Texas ” (Lindheimer), Upper 
Hondo (Keverchon), Uvalde Cafion (Mrs. Young). 
13. OSMUNDA L. 
Fertile portions of the frond very much contracted, bearing short 
pedicelled naked sporangia on the margins of the rachis-like divisions: 
sporangia large, globular, opening by a longitudinal cleft into two halves 
with the merest rudiments of a transverse ring: spores green. 
1, O. regalis L. Stipes clustered, 4 to 6 dm. long, erect, naked: fronds 6 to 15 
din. long, bipinnate, fertile at the apex; sterile pinnae 1.5 to 3 dm. long, 5 to 10 cm. 
wide, with oblong, obtuse divisions. —Texas (Wright). 
O. cinnamomea L, is to be looked for in swampy portions eastward. 
OPHIOGLOSSACEZ. 
Plant body consisting of stem and leaf rising from a fleshy some- 
times bulbous root, straightorinelined in vernation: sporangia formed 
from the interior tissue of the frond, spiked or panicled, not reticu- 
lated, opening by a transverse slit into two valves: spores copious, 
sulphur yellow. 
1. OPHIOGLOSSUM L. (Apprr-roncur.) 
Sporangia large, coriaceous, connate coherent in two ranks on the 
margins of a simple spike: veins forming copious areolwe.—Small 
plants of low grassy lands. Inconspicuous and therefore not often col- 
lected. 
1. O. vulgatum L. Rovtstock short, oblique: stalk 8 to 20 cm. long, bearing an 
ovate or elliptic-oblong sterile segment near its middle: spike 2 to 3 em. long. (0. 
fnglemanni Prantl.)—Houston (Hall). 
2. O. crotalophoroides Walt. Rootstock bulbous, 6 to 10 mm. thick: stalk 8 to 
15cm. long, bearing the ovate sterile segment considerably below the middle: spike 
6 to 10mm. long, thick. (O. bulbosuin Michx.)—Houston (Hall), 
