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80 F E R N S O F NORTH AM E R IC A .
short triangular lobes, and at others pinnately cleft into four
or five often bifid lobes on 'the superior side, and into three
or four rather shorter and simpler ones on the inferior side.
They are thin-membranaceous, but not so delicate as those
of Asplenium myriophyllum, the only other fern hitherto detected
in Florida, with which this one may be compared.
There is but a solitary vein in each ultimate lobe, and
in the fertile fronds there is one oblong sorus to each vein,
the thin and delicate indusium attached on the upper side of
the vein. Rarely a sorus is diplazioid, and has a double indusium.
The spores are ovoid or roundish, and irregularly
wing-margined.
The group of species referred by Swartz to Cænopteris,
and by Smith and Willdenow to Darea, consists of about 30
Asplenia with the ultimate divisions of the frond narrow
and containing but one vein. But the group has no certain
buondary, and the present plant, though called Coenopteris by
Swartz, and Darea by Willdenow, is excluded from the group
by Hooker and Baker. Hooker’s A . monteverdense is partly
a young form of this plant, and partly A . myriophyllum.
Plate LVL, Fig, 4-6 .— Asplenmm cicutarium, from Florida. Fig.
5 is a pinnule, less deeply lobed than is often seen on South American
specimens, and Fig. 6 is a spore.
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