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ADIANTUM SULPHUREUM.
K a u l f u s s . H o o k e r . K u n z e .
P L A T E I .X I .
A diantu m—D ry . Sulphureous.
A L O V E L Y very rare Fern.
Native of Chili, Conception, and Porn.
The fronds, which are ovate in form, are tripinnate; the
pinnules, which are small, are obovate-reniform, petiolulate,
glabrous, membranaceous; deep green on the upper surface,
and covered with a shining yellow pulverulent substance
underneath.
Sori copious, contiguous, situated in the notch, and somewhat
reniform in shape.
Stipes and rachis glabrous and ebeneous.
There are two varieties; in tbe one (var. minus) the pinnules
are small, and tbe sori reniform, the length of frond being
from four to five inches; in the other (var. majus) the pinnules
are larger, tbe sori oblong-reniform, and tbe length of frond
twelve inches.
I believe tbis species is not in any collection in a living
state in this country except in that of Mr. Backhouse, of York.
The frond illustrated was kindly sent by Mr. Backhouse.