636 
FILICES. (FERNS.) 
sometimes rather 2-pinnatifid with narrower lobes ; fructification 
irregular, 1 -2-pinnate. — Rocky woods. New England and New York, 
rare. — Very likely a depauperate state of the last. 
91. OPfIIOOL,dSSU]W, L. Adder’s-tongue. 
Frond a naked stalk rising straight, bearing a lateral sterile por¬ 
tion resembling an entire ovate-oblong leaf with finely reticulated 
immersed veins, and a simple terminal spike, on which the opaque 
and coriaceous sessile sporangia are closely packed in 2 ranks, all 
more or less coherent together, so as to appear necklace-jointed, 
transversely 2-valved. Spores copious, sulphur-color. (Name 
compounded of o<£is, a serpent , and yXSxrara, tongue.) 
1. O. Vlllgatuui, L. Sterile frond borne about the middle, 
ovate-oblong, obtuse, sessile (about 3 ; long), shorter than the spike, 
root fibrous. — Moist woods, very rare. June. — A few immature 
specimens of a remarkably dwarf state, V-2' high, with the young 
spike almost sessile, w r ere gathered by Dr. Curtis, in Otsego county, 
New York. 
Order 132. LYCOPODIACE^E. (Club-Moss Fam.). 
Low plants , usually of Moss-like aspect, with the solid and 
often woody stems thickly clothed with sessile awl-shaped or 
lanceolate persistent and simple leaves , hearing the 2-4- 
valved spore-cases sessile in their axils; chiefly represented 
by the typical genus 
I. LYCOPODIUM, L., Spring. Club-Moss. 
Spore-cases of only one kind ( sporangia , much like those of 
Ophioglossum, but larger), coriaceous, flattened, usually kidney- 
shaped, 1-celled, opening by a transverse line round the margin? 
thus 2-valved, discharging the subtile spores in the form of a very 
copious sulphur-colored inflammable powder.—Perennials, with 
evergreen 1-nerved leaves, imbricated or crowded in 8— 16, rarely 
in 4, ranks. (Name compounded of \vkos 9 a wolf , and irovs,f°°t> 
from no obvious resemblance.) 
§ 1. SelAgo, Dill.— Sporangia scattered in the axils of the ordinary 
and uniform (dark-green and shining , rigid , about S-rankcd) leaves. 
1. Li. lucidullllll, Michx. Stems*thick, 2 or 3 times forked, 
the branches ascending (6' -12' high) ; leaves widely spreading or re ~ 
