A biological study of Durvillaea antarctica (Chamisso) Hariot and D ...

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~) (a) Stipitate lateral laminae and bud-like processes
largely confined to the margins of the primarv lamina
in its prmd.mal region"
Rarely if ever arising from
along the stipe.
long.
Longest stipes less than 0,5 hl
D. potatopum
(b)
Stipitate lateral laminae and bud-like processes
arising in a more OJ::
less spiral manner from the stipe
and also attached along the IOVler margins of the
prima.ry lamina, Longest stipes up to 2 m long.
Small plants: Any bud-like prOcesses are confined to
the stipe.
D, wi nana
Bory (18260. and 1826c) listed respectively Lcom:Y/apia pappa
Leman (1822:189) and Lmninapia poppoidea Lamouroux as synonyms of
DurviZZaea uti lis.
Chamberlain (1965) attempted to resolve Ule
relationship between these tvlO species and D. UtiZ1:S, but confused
the issue flrrther by attributing statements made by Leman to
Lamou:roux.
(i) Laminaria pOPpa Leman (1822:l89)
This was the name Leman gave to a seaweed that Le Gentile had
called "porra" (Le Gentile 1781:2lS)" According to Le Gentile r
"porra" ...,as the name that Spanish sailors called large floating
masses of seatlleed which they encountered off the southern Californian
coast.
As Setchell has pointed out (1908: 130), Le GenU 1e ' s
illustration (Le Gentile ibid Vol.2, PI.3) is an extremely good
likeness of PeZagophycus poppa (Len~n) Setchell, Bory was in error
in listing Laman's species as a synonym of D. utilis,
(ii) Lami'lUlJ'ia porroidea Lamouroux (1825: 247 and 1826 ~ 66)
La.mourollx claimed that the same "porra" of: the Spanish sailors
also gr8\1/ on the coas t near Valparaiso.
However, Fe 7.agophyous pOP.pa
does not grm.". any~lhere along the Chilean CoasL Bory (1828;65)
claimed that specimens in Lamouroux's herbarium had been tentatively
identified as Lamina:ria pOY'Y'oidea.
One such specimen a't Caen
(Fig, 3.1a) is annotated in one hand "Lamina"t'ia pOT'Y'oidea Lima,
Valpar.9_iso (Lamouroux 1825) II and in another "D 'UrvilZaea utilis
Clmerique Meridionale"" The specimen is part of the blade of a
femo.le D. antarctica plant..
I·c is highly honeycombed and clefl-. in'co