1,444 research outputs found
Botanic evidence in favour of land connection between Fuegia and Tasmania during the present floristic epoch
Tasmania is rich in plant vestiges, that is, in the presence
of isolated species or small groups which appear to be the
last remnants of various migrants or passed floras, and
it is an interesting speculation whence came those forms
and what topographical conditions of past ages they may
indicate. The only part of this history that has received
any attention up to the present is that which appears to
give weight to the theory of continuity of land between
Tasmania and Fuegia, by way of antarctic or subantarctic
regions, during comparatively recent times.
The only plants which appear to give any weighty
information are those belonging to the genus Fagus, commonly known as beech
Tasmanian Discomycetes
The students of Tasmanian Fungi have very insufficient
means of becoming acquainted with described species, and
further, such a small number of those indigenous in the Stat~
have been described that there is fair reason to justify a
paper to bring our knowledge up to date. It is probable
that some, perhaps many, of those described as new may
eventually be recognised to be identical with forms already
named elsewhere, but if we wait till we shall commit no
errors the purpose of this paper will not have been met. It
is essentially one to afford a student an easy means of
recognising the local species of the large fungus group
known as Discomycetes. The only work already available
to students is Cooke's Handbook of Australian Fungi, and the
information in that book is too fragmentary, and often
erroneous, to be of much assistance. The Gymnoascaceae
have been included at the end of the paper, though they
belong to another group, Plectomycetes. The disc-fruiting
fungi, which have.adopted a parasitic habit, commonly known
as Lichens, are excluded from convenience, and not from any
supposition that they are genetica1ly distinct. The Histeriales
are almost continuous with some of the smaller plants of our
group, but their distinction may soon be recognised
Botanical descriptions of Eucalypti
Eucalyptus globulus (Labillardiere)
—Tall, erect tree, even in
exposed situations, tending to preserve a preponderating main-stem
till the high forest age is reached, the branches few and acutely
diverging; bark deciduous. Mature foliage alternate, stalked,
lanceolate, acute, oblique, 6 to 12 inches long, 1 to 2 inches wide.
Flowers solitary in the leaf axils. Outer operculum smooth,
shed while the bud is approaching maturity ; calyx and inner
operculum rough, warted, and obscurely four-ribbed ; mature
calyx about | inch in diameter; anther-cells parallel. Fruit
broadly obconic, | to 1 inch in diameter ; capsule slightly protruding
; valves obsolete. In Eastern Victoria the common form
of this tree bears a three-flowered umbel in the axil, the flowers
being half the size recorded in the type, and less warted. In
Tasmania, where this species and E. viminalis are mixed, a form
will occasionally be found consisting of odd trees in which the
flowers are in threes, the operculum and fruit quite smooth, and
the fruit about three quarters to one inch in diameter, the valves much protruding.
This, though very close to the Victorian form, may
be a hybrid
Notes on some rare and interesting Cryptogams.
Among the enthusiasts who have pushed the study of
plants to its present high level, few have done much research
amongst the lower groups, especially the fungi. Little more
has been done than could be classed as simply scratching
the surface. There is plenty of new material at hand ready
for the worker. The only trouble is that sometimes when
returns are copious it is not always easy to induce an estimable
society to publish it. The plants brought before you in the present paper are
of exceptional interest, though few. The Hepatics here
described by Pearson are the last lot collected by our old
friend, W. A. Weymouth. Pearson, who died only a short
time ago, was for many years a corresponding member of
this Society. Terfezia tasmanica., n.s. An irregular subterranean
tuber, just emerging from the ground when mature, usually
1-3 cm. diameter, chestnut-brown, tough fleshy.
Slopes of Mt. Wellington, 300 ft.
Xylaria tolosa, n.s. Sporophore usually arising with a
long root from a loose subterranean sclerotium; erect, black
surface.
includes notes and description of species
Additions to Tasmanian flora
Before the year closes I am anxious to place on record a
brief description of three interesting plants. Of these two
are new species, the other doubtless introduced.Description of species and the habitat.
Ranunculus setaceus. ns.
Pseudanthus tasmanicus. ns.
Rumex dumosus, A. Cunn
Two interesting fungi
In June, 1902, I sent an underground fungus to Kew to be named, and with the hope that a description would be published in due course in the Kew Bulletin. George Massee, who at that time controlled the fungus department, suggested for it the name Secotium sessile, but it appears a description was not published.
In the year 1911 I read a paper before the Royal Society of Tasmania on the Hymenogastaceae, of Tasmania, including therein four Secotiums. In all good faith I described
S. sessile, believing it had already been described by Massee. Mr. G. H. Cunningham, Mycologist of New Zealand, now points out that, according to modern ideas, the presence of Cystidia places this tuber in the genus Elasmomyces, and advises me to describe it as a member of that genus
Additions to the Tasmanian flora
The few additions here made to our flora are all cryptogamic.
Of the true mosses Fissidens tasmanicus and
Amblystegium austro-serpens are endemic, and recently described
by Prof. V. F. Brotherus, of Helsingfors. The
second genus was not previously represented in Tasmania.
Of the Hepatics, the presence of Palluvicinius connivens
on our mountains is another connecting link with New
Zealand flora. Chiloseyphus kirkii also was hitherto only
recorded from New Zealand. Calypogeia tasmanica adds
a new genus as well as species to our list. Of the two
fungi it is not surprising that the Geoglossum appears as
it is common in Australia, but the Mitrula has not hitherto
been recorded south of the equator.
We now claim two Geoglossums and three Mitrulas.
Geoglossum glabrum, Pers.;
Geoglossum hirsutum, Pers.;
Mitrula berterii, Mont.;
Mitrula curullata, Fries. and
Mitrula olivacea, Sacc
On the occurrence of Wolffia arrhiza, Wimm.,in Tasmania.
Marsh plants have generally the widest distribution, and
of the Duckweeds these are no exceptions. Lemna minor,
L., and Lemna trisulca, L., both cosmopolitan species, are the
only plants of this family that have hitherto been recorded
from Tasmania. We now may report Wolffia.
Growing in a marsh near Lewisham, also on Maria
Island.
The genus Wolffia is of quite a different structure.
Instead of floating horizontally, it does so perpendicularly,
exposing an edge to the air and sinking the greater portion
of the frond as an oblique plate. Flowering is unisexual, and
takes place in the centre of the exposed portion. It bears
no root. The following notes are a description of Wolffia arrhiza as found in Tasmania
- …
