634 
FILICES. (FERNS.) 
linear or thread-like, sometimes forked and cleft (whence the name, 
from to slit). 
1. S. pusilla, Pursh. Sterile fronds linear-thread-form, sim- 
p e, tortuous, much shorter than the stalk of the fertile, which bears 
about 5 pairs of short crowded pinna; at its apex-Low grounds, 
Pine barrens of New Jersey, rare. —A delicate little plant, 3'-4' high. 
18. LICODIUM, Swartz. Climbing Fern. 
Fronds twining or climbing, bearing stalked and variously lobed 
lvisions in pairs, with free veins, fruit-bearing on separate con¬ 
tracted di\ isions or spike-like lobes, one side of which is covered 
with scale-like hooded indusia imbricated in 2 ranks, fixed by its 
ower edge, each inclosing a single sporangium, or rarely a pair. 
Sporangia much as in Schiztea but oblique, fixed to the vein by its 
inner side next the base. (Name from \oy^,Jk.rite.) 
flplllJk* , P * ,m “ tUm ' Swartz. Very smooth; stalks slender, 
its shor^ it Win,n £ ( J° n 8)» from slender running rootstocks; 
bearinTa^ altern ;‘e branches or petioles deeply 2-forked, each fork 
^g a^oT" 
lO. O S UIXI ]% T j> ^ ^ L. Flowering Fern. 
Sporangia globose, short-pedicelled, naked, entirely covering 
erti e frond* or pinnae (which are contracted to the mere ra- 
c is), t un and reticulated, not striate-rayed at the apex, opening 
»% q lnt ° ^ Va ^ ves across the apparent top (opposite the pedi- 
cel). Spores green. Fronds tall and upright, from thickened 
roo atoc -s, 1 2-pinnate ; the veins forking and free. ( Osmunder, 
a Saxon name of Thor, a Celtic div-inily.) 
*/ 2 -P in ™“ i pinnules somewhat stalked, merely serrulate. 
Jc £ a , I? C bi,IS ’ VV,lld - (F'.ow f .b, N c Fern.) Very smooth, 
pa e (2°-4 high); sterile pinnules 20 or more, lance-oblong, rather 
obhque but no, auricled at the base (2' long); the fertile forming an 
mon Ju‘iy m ° Se PaniC ‘ e a ‘ the 8Ummit ° f fr ° nd - - Swam P 8 ’ COn " 
i^^ e f ron/ ie pinnate : pinnte deeply pinnatifid; the divisions entire. 
- * Claytoniana, L. Clothed with loose wool w r hen un¬ 
folding, soon perfectly smooth ; pinna oblong-lanceolate, with oblong 
obtuse divisions; some (2-5 pairs) of the middle pinna: fertile, these 
