BorrycHiuM. CLXIV. FILICES. 635 
long, rather acute, entire; some of the intermediate leaflets fertile—A iarge 
fern in low grounds. Fronds 2—3f high, light green, interrupted near the mid- 
dle by 2—4 pairs of fertile leaflets, which are so much contracted in size as to 
resemble dense, compound racemes, and densely covered with small reddish- 
brown thecz. Stipe channeled, smooth above, chaffy at base. June. — 
14. LYGODIUM. Swartz. 
Gr. Avywées, flexible, slender; fromthe slender, climbing habit. 
Thecz sessile, arranged in 2-ranked spikelets issuing from the 
margin of the frond, opening on the inner side from the base to the 
summit; indusitim a scale-like veil covering each theca. 
L. patmatum. Sw. Climbing Fern. 
Stem flexuous, climbing ; fronds conjugate, palmate, 5-lobed, lobes entire, 
_ obtuse; spikelets oblong-linear, from the upper fronds, which are divided and 
contracted into a compound spike.—This is one of the few ferns with climbing 
stems, and the only one found in the U. S. Plant of a slender and delicate 
structure, smooth. Stem 3—4f long. Stipes alternate on the stem, forked, 
supporting a pair of fronds which are palmately divided into 5—9 segments. 
Fertile fronds terminal, numerously subdivided into linear-oblong segments or 
spikelets, with the fruit in 2 rows on the back. Mass.! to Penn., &c. July. 
1s. SCHIZ AA. Smith. 
Gr. oxfa, to cut, cleave ; alluding to the many-cleft spikes. 
Spikes unilateral, flabelliform, aggregate ; thecze roundish, radiate 
at top, sessile, bursting laterally ; indusium continuous, formed of the 
inflexed margins of the spikes. 
S. pusitya. Pursh. (S. tortuosa. Muhil. 
Frond simple, linear, tortuous; spikes few, crowded at the top of a long, 
slender stipe or scape.—A very delicate fern, found in the pine barrens, Quaker 
Bridge, N. J., also in Western N.Y. by Mr. Timothy Westmore! Fronds nu- 
merous, czspitose, 2—3/ long, 3—1” wide. Fertile stipes several, 3—6’ high, 
filiform, with a few short, unilateral spikelets at top arranged in 2 rows, 
Thece somewhat turbinate, in 2 rows on the inner side of each spikelet. Aug. 
Trise 3. OPHIOGLOSSE Z.—Thecz 1-celled, adnate at base, subglobose, 
coriaceous, opaque, half-2-valved, not cellular, and destitute of a ring. 
16. OPHIOGLOSSUM. 
Gr. ogts, a serpent, yAooca, tongue; from the resemblance. 
Thecee roundish, opening transversely, connate, arranged in a 
2-ranked, articulated spike. 
O. vuteatum. Adder’s Tongue. 
Frond simple, oblong-ovate, obtuse, closely reticulated; spike cauline—A 
curious little plant in low grounds. Fronds solitary, 2—3’ long, 3 as wide, 
amplexicaul, entire, smooth, without a midvein, situated upon the stem or stipe 
a little below the middle. Stipe 6—10’ high, terminating in a lance-linear, 
compressed spike, 1—2’ long, with the thece arranged in 2, close, marginal 
ranks. Thecz opening outwards and horizontally, becoming lunate, distinct, 
straw-colored. Vernation straight, not circinate. June. 
17. BOTRYCHIUM. Swartz. 
Gr. Boros, a cluster of grapes; from the resemblance of the fructification. 
Thee subglobose, 1-celled, 2-valved, distinct, coriaceous, smooth, 
adnate to the compound rachis of a racemose panicle ; valves open- 
ing transversely. 
1. B. NecLectum. Wood. Meriden Botrychiwm. 
Stipe bearing the frond near the top; frond simply pinnate, very short, 
with subentire or subpinnatifid segments ; spokes paniculate—A singular species, 
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