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POLYSIPHONIA SPINULOSA.
Round-fruited Polysiphonia.
C l a s s a n d Okdeh CEYPTOGAMIA ALGÆ, i r á n — N a t . O h d . ALGÆ,
Juss. De Cand. Grev.
G EN ERIC CHARACTER.
Frons Jiliformis (rubra), ramosa, articúlala; articuli tubulis plunbus inter-
nis striati. Fructificatio duplex; tubercula externa, aut apicibus ramuhrum
innata.
Frond filiform (red), branched, articulated: articulations striated with seve-
ral internal tubes. Fructification double ; external tubercles, or innate
ones towards the summit of the branches.
S P E C IF IC CHARACTER.
P olysiphonia spinulosa ; atro-rubescens ; ramis divaricatis, subrigidis, ramulis
brevibus, strictis, subulatis, divaricatis; articulis diámetro subæqualibus,
tritubuhsis ; tuberculis ghbosis, sessilibus, minutissimis.
P. dark red, branches divaricate, somewhat rigid, the ramuli short, straight,
subulate, divaricate; articulations about equal in length and breadth,
3-tubed ; tubercles globose, sessile, excessively minute.
H ab. Sea-shores. Appin, Captain Carmichael.
Frond 1-2 inches in length, of a dark red colour, much branched, with a
rigid and spinulose habit; main branches rather remote, irregulai', much
divaricated, somewhat flexuose ; ultimate ramuli straight, subulate, almost
thorn-like, divaricated like the rest, sometimes minutely divided at
the apex, and each of the divisions terminated by a long, hyaline, jointed
filament. Articulations about as long as broad, striated with three internal
tubes o f a pale brown-pink under the microscope. Tubercles very
minute, quite sessile, round, dark red, scattered freely on the branches,
and containing several dark granules.
I t is fortunate when the active and intelligent naturalist is
rewarded by the discovery of new objects, for the time and patience
he expends in bringing to light the more hidden treasures
of our Flora. Captain C a r m i c h a e l , as w e have in deed
already noticed, has been thus repaid. The present inte-
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