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1 5 8 F E R N S OF NORTH AM E R IC A .
of the variety most of them are separated by a sinus half as
broad as the lobes themselves.
Both the typical form of this species and the variety are
easily cultivated in a somewhat moist and shaded place, but
will do best if they be afforded a soil largely mixed with peat.
LX V I.— Aspidium cristatum. Fig. i represents a fertile frond of
the typical form, from near Boston. Fig. 2 is an enlarged pinnule.
Fig. 3, an indusium. Fig. 4, a spore. Fig. 5 is a section of the
stalk. Fig. 6 is a pinna from the middle of a frond of var. Clintonianum.
Fig. 7 is a pinna of the same, enlarged. Fig. 8, an indusium.
Fig. 9, a spore.
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