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I
Pinna of mature Frond, under side.
ASPIDIUM THELYPTEROIDES.
S w a r t z .
PLATE XXXI.— -X. VOL. VI.
Aspidium novehoracense,
“ pumilum,
Nephrodium thelypteroides,
Polypodium novehoracense.
L i n k . S w a e t z . W i l l d e n o w .
S ciiKTJHR . K u n z e .
O f G a r d e n s .
K ic it a u x .
LiNNiEUS .
Aspidium—The Shield Fern. Thelypteroides—.,
I n t h e S e c t io n L a s t r e a o f A u t h o r s .
T u b present species, althougli more dwarf in habit than
Aspidium thelypteris, still in all its characters it so nearly
approaches A . thelypteris of Swartz, and A . pumilum of
gardens, that I have hesitated in placing it as distinct from
that species; the illustration, however, is given as a guide to
the cultivator.
A North American Fern, and in all probability only a variety
of our British A . thelypteris.
For a plant I am indebted to Mr, Sim, of Foot’s Cray.
There appear to be two forms in North America, the one
known as Ijustrea novehoracense, and the other as L . thelypteroides
; the former differs in a slight degree in having its creeping
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