Adiantum dissimulatum Jenman

OCR>>>New York Botanical Garden
THE NEW YORK BOTANICAL GARDEN
Herbarium of Georqe S. Jenman
PRE8ENTED BY MR. D. O. MILLS. 1903
JAMAICA
Jenman s Jamaica Ferns, de.
ADIANTUM DISSIMUI.A.TUM, n sp.
Stipites erect, £ to 1J feet Ions', black, polished;
fronds erect, 1 to 1% feet long, 5 to 10 inches wide,
bipinnate, firmly chartaceous, naked, dark green,
consisting of a long central pinnate portion and tiro
to three baia), much smaller, spreading, pinnate
branches; rachis and costs like the stipites; leaflets
apart or contigaoas, sessile, deltoid-rhomboidal on
the central branch, varying to oblong or ovate-
oblong in the inferior ones of the lower branches,
the terminal elongated; veins free, fine, close,
flabellate, repeatedly forked; margins dentate when
barren: sori eontinnons around all bat the basal
and interior segments. -irt -* f —r 4
luIIF ------ ■
Bull Head, 3000 feet elevation, Clarendon, Jamaica.
Collected by Mr. Hart. Mr. Hart sent me a speci-
men of this at the time, years ago, that he foand
it, calling my attention as well to its likeness to
A. KendaUii, Jenm., bat pointing oat features of
difference. Both likeness and unlikeness were
obvious, but I was unwilling to found a species on a
single imperfect frond. Now I have seen a fall- 1
grown perfect frond of Mr. Hart’s, and have no
hesitation. The habit and catting in both are alike,
the separativeness lies in the difference of text a re
and the shape of the pinnas. O. 8. Jenman. Demtrara,
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