i'late V.
means a heap; the intention being to indicate the variation
or change which occurs in the apparent arrangement of the
sori, from the distinct patches to the continuous lines in
which they are seen to be disposed, if examined at different
stages of development—the change,' after all, being only
apparent, and not real.
A l l o s o r u s c r i s p u s , Bernhardi.— The Rock Brakes, or
Mountain Parsley. (Plate V. fig. 1.)
This elegant little plant, wliich has considerable first-sight
resemblance to a tuft of parsley, and is hence sometimes
called Mountain Parsley, grows in a dense tuft, throwing up
its fronds in May or June, and losing them in the course
of the autumn. The fronds average about six inches in
height, and are generally almost triangular, with a longish,
slender, smooth stalk. They are of two kinds; both kinds
twice or thrice pinnate, and of a pale green colour. The
segments into which the fruitless fronds are cut, are more
or less wedge-shaped, and notched or cleft at the end. The
fertile fronds have the segments of an oval or oblong or
linear form.
The divisions of the fertile frond have a slightly tortuous
midvein, producing simple or forked venules which
extend nearly to the margin, each, for the most part, bearing
"W, lit&h 3a 1 etlith.. Heeve &irichdJ.-
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