
180 A C R O S T IC H UM L O N G IF O L IU M .
ceolate-acuminate in form, slightly u ndulated, having the base
attenuated, and b rig h t green in colour. F e rtile fronds erect,
also lanceolate-acuminate, attenuated at the base, smaller than
the barren frond, and somewhat narrower.
Both fronds articulated immediately above the base of the
stipes. Fronds lateral.
Ehizoma creeping and scaly.
Sori amorphous, densely covering the rvhole under surface,
except the midrib, the contrast between the black sori and
the green midrib being very conspicuous.
Veins forked and free, internal and indistinct.
L ength of frond from twelve to eighteen inches.
Eachis and stipes, as well as the frond itself, scattered over
with large brown scales.
F o r a plant my thanks are due to Mr. P . Clarke, Director
of the Eoyal Botanic Gardens, Glasgorv.
I t may be procured of Alessrs. Sim, of F o o t’s Cray; E o llisson,
of T ooting; and Jackson, of Kingston.
The illustration is from a plan t in my own collection.
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