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

40
March 1976). There may be other isotypes at
Kiel. (See addendum)
Valparaiso.
The appearance of the isotype described above, suggests tllat
Suhr cut up the specimen he illustrated, and distributed fx:agments
to several herbaria 0
Montagne (1846:38) and Areschoug (1947:271) both regarded D.
mastix Suhr as a form of D. u-tilis Bory.
The presence of honey-­
combing in the lamina leaves no doubt that the specimen is D.
antarctica.
(8) Durvillea harveyi Hook.f. in Hooker and Harvey, Algae
AntaY'cticae London Jou:rnal of Botany vol. 4: 249
(1845) .
Diagnosis: "radice e fibris crassis demum
anastomosantibus constante, stipite perbrevi valido
compresso in laminam subsolidam coriace~n apice
laciniatam gradatim attenuato.
A very distinct species, vihich may readily
be recognised by the fibrous root, that of D. utiZia
always being scutate. The frond is of a much
thinner texture (though covered with frucification)
and never, even in its largest sta.te,has been
found incrassated or filled with transverse
inflated cel18i it often attains a length of six
feet and lJ.p'·mrds,"
BM.
Specimen annotated "Durvillea Harveyi
Hook.fiL Hermit Island, Cape Horn, Antarct. Exp.
1839-43 J.D.H." The nuwbers 2 and 3 are written
respectively in the bottom left and right corners
(Fig. 3.ld). It is a female plant with a broadly
lanceolate lamina folded three times to fit the
shee't. Its holdfast (largely intact) is
extensively burrowed, and holey.
Two i80 types have been seen: f\ EM (K) specimen
(Noo 6/1094/58) annotated "DuY'villea l-Iarveyi -J.D.H.
Antarctic Voyage." This incomplete specimen
consists of the major part of a broB.d1y lanceolate
frond folded once to fit the sheet (Fig. 3,2c).