635 
FILICES. (FERNS.) 
entirely pinnate ; sporangia brownish. (O. interrfipta, Michx $c.)— 
Low grounds, common. May: fruiting as it unfolds. — This being 
Clayton’s plant (as I ascertained in 1839, both from the Claytonian 
and Lin mean herbaria), though wrongly described from young speci¬ 
mens in which the fructification was mistakenly thought to be ter¬ 
minal, must bear the original name. 
3. O. ciunamomea, L. (Cinnamon-Fern.) Clothed with 
rusty wool when young; sterile fronds smooth when full grown, the 
lanceolate pinnae pinnatifid into broadly oblong obtuse divisions ; fer¬ 
tile fronds separate, contracted, 2-pinnate, entirely covered, or nearly 
so, with the cinnamon-colored sporangia. — Var. frondosa is a rare 
occasional state, in which some of the fronds are sterile below and 
more sparsely fertile at their summit (O. Claytoniana, Conrad , not 
of L.) — Swamps and low copses, everywhere. May. — Growing in 
large bunches, the fertile fronds in the centre, perfecting fruit as they 
unfold, l 0 -2° long, decaying long before the sterile fronds (at length 
4°-5° high) get their growth. 
20. BOTBi'OIIIUM, Swartz. Moonwort. 
Frond ternately or pinnately divided or compound, rising straight 
from the clustered roots; the lateral division sterile, with forking 
free veins, the terminal one wholly fertile, spike contracted, the 
spikes pinnately panicled. Sporangia sessile, clustered but dis¬ 
tinct, rather coriaceous, transversely 2-valved, shedding the copi¬ 
ous powdery sulphur-colored spores. (Name a diminutive of j3 6- 
rpvs , a cluster of grapes, from the appearance of the fruitful fronds.) 
1. B. lunarioides, Swartz. Stalk bearing the petiofed sterile 
frond near the base, which is broadly triangular, 2-ternately divided , 
and the divisions mostly pinnatifid ; lobes roundish, ovate, or some¬ 
what kidney-shaped, crenulate, thickish ; fructification 2-pinnate. (B. 
fumarioides, IVilld.) — Varies greatly in division of the frond; as var. 
oblIquum (B. obliquum, Willd .), with oblong or lanceolate divisions, 
oblique at the base; and var. dissectum (B. dissectum, ftilld.), with 
linear cleft and toothed divisions and lobes. — Low woods, rare. July. 
— Plant 6 ; - I5 f high. 
2. B. VirginiClini, Swartz. Slightly hairy (10'-20' high) ; 
sterile frond above the middle , broadly triangular in outline, spreading 
(6'-12'wide), ternately divided to the base, therefore sessile , thin; 
the branches pinnate; pinnae pinnately parted; pinnules lance-ob¬ 
long, cut-pinnatifid or sharply toothed; fructification 2-pinnate. (A 
smaller state is B. gracile, Pursh ) — Rich woods, common. July. 
3. It. Simplex, Hitchcock. Dwarf (S»-6» high) sterile frond 
oblong, pinnatifid into a few obooate-wedge-shoped cut-toothed divisions. 
