F U C tJ S natans.
Float Fucus.
CRYPTOGAMIA Algae.
G en. Char. Seeds produced in clustered tubercIeSj
which burst at their summits.
Spec. Char. Stalk threadshaped, alternately bipinnate.
Leaves oblong-lanceolate, serrated, with a mid-rib.
Vesicles globose, membranous, on compressed stalks.
Syn. Fucus natans. Linn. Sp. PI. 1628. Turn. Syn. 48.
Hist. Fucor. v. 1. 99. t. 46.
F o r this authentic specimen we are indebted to our good
friend Mr. Turner, who informs us that Mr. Patrick Neil of
Edinburgh has received both this and lacciferus, t. 1967,
from the Orkney isles.
' The present species, first distinguished from that by
Mr. Turner, is observed by him to have a more regularly
pinnate stalk, generally broader and blunter leaves, with less
spinous serratures. The vesicles are much less abundant,
their stalks compressed, not round, their substance membranous
and smooth, not leathery and rough. The fructification,
known only in this, consists of axillary tufts of oblong,
cloven, rugged, dark-brown, pod-like tubercles, in
each of which several dark seeds are found, deeply imbedded
in mucus. At the sides of the leaves are often produced
little fibrous tufts, as in other Fuel, concerning which no
certain opinion has yet been formed.
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