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

41
A TeD spccimclI annotated on the paper tape
af f ix ing the spec line n "Durvi 7. laea lIarvey'i Hook. f i 1.
J.D. Hooker". This specimen is largely entire ,
approxllilately 60-70 em long and folded Ohe0 to fit
the shee'c, The tip of a lamina presumably from
another specixllen is attached inche top 1:ight
corner (Fig. 3,2a),
A third Hooker specimen, which is p:cobably
isotype mat.erial was borroll/ed from Ke\-.l in 1964
and returned in 1975. rt has subsequently been
mislaid.
"Hermi'i: 181., Cape Horn and the
Falkland Islands".
In Flora Antarctica 1(2): Flora of Fuegia the Falklands etc.
Hooker published (lB46) 1 drawings of a large (plo 165) and a small
(PI. 166) D. haY'Veyi plant, and in 1847 a more amplified description
of t.he spec les (p .456) . Herbarium ·specimens I have seen mC'. tch
neither of these drawings, The larger d.'Cawing is identical to many
medium or large sized D. antarctica growing in semisheltered
localities in New Zealand. Its holdfast, as drawn, is perforated
by numerous holes. It is not an anastomosing mass of fibres as
described by Hooker in his 1845 diagnosis. nor could it be described
as a "fibrous root". The lamina has an e)'tensive palm, ana is
div ided distally into a series of nonhoneycornbed, narrow t,hongs"
Assuming that the drawing is life size (it is a folio illustration)
then the specimen slightly trimmed had a minimum length of 1 m.
The smaller drawing (Pl. 166) is of a plant \-Jith a stipe and
lamina iden'dcal to that of many small D, antw'ct,:ca in New Zeo.land,
particular 1):' those growing along 'the upper fringe of the kelp band"
Its holdfast. however, is quite unlike that of any DuyviUaea.
dichotomously forking, interlacing haptera, it closely resembles a
Macrocyatis pyrifera holdfast.
i'lith
In 1847 Hooker stated that D, haY'Veyi plants Wi2.ce 4·-8 feet long,
that they \'lere considerably shorter than D, u-tilis and vd:th a thinner
texture 1 and that i i:s stipes were .-1-4 inches long. As mentionea
previously 1 and also in Chapter 5 I lamina shape