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these teeth not very well developed; but the plant of Utah
and California has very sharp teeth, the veinlets running to
the points of the teeth. The degree of incision varies very
much, and a plant incised but little more than that which is
shown in the middle of our plate was figured in Species Filicum
as “ var. l> pinnis profunde incisisi'
In fertile fronds the teeth either disappear, or are seen
only on the upper part of the sides of the lobes, and the ends
of the lobes are occupied by the lunate or transversely oblong
involucres. The spores are smooth, globose-tetrahedral, and faintly
marked with three radiating vittæ. The veins are free, and
flabellately forked from the base of the pinnules.
The group of Adiantum, to which this species belongs, is
characterized by having ovate-pyramidal fronds (at least bipinnate)
fan-shaped pinnules, and forking veinlets with no midvein.
It includes over a dozen species, which are not always easy to
be distinguished from each other.
Plate 'AAXStW. — Adiantum Capillus-Veneris. The colored plant in
the middle of the plate was collected by Mrs. Stanley Bagg near Santa
Barbara, California, and represents a form with few very large and deeply
incised pinnules. The frond drawn in outline is from the White
River. Arkansas, and was collected specially for this plate by Professor
F. L. Harvey. The details are a fruiting pinna, slightly enlarged, the
end of one lobe magnified, and a spore highly magnified.
Since these pages we re stereotyped I have learned th a t this species and Asp le .
nium fmrvulum have been found in Greene County, Missouri, by Mr. E . M. S h e p a h d .
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