Document information
Physical location:
RB MSS M1, Library, Royal Botanic Gardens Melbourne. 84.00.00e
Plant names
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Hydrocharidae
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Preferred Citation:
David Spence to Ferdinand von Mueller, 1884 [84.00.00e]. R.W. Home, Thomas A. Darragh, A.M. Lucas, Sara Maroske, D.M. Sinkora, J.H. Voigt and Monika Wells (eds), Correspondence of Ferdinand von Mueller, <https://vmcp.rbg.vic.gov.au/id//letters/1880-9/1884/84-00-00e-final.odt>, accessed June 13, 2026
1
MS found with a specimen of Isolepis fluitans (MEL 3681). Letter dated approximately on basis of Spence collections at MEL, all
of which date from between 1882 and 1890. Firm dating on the basis of specimen numbers is difficult as Spence used the same
number more than once within a given year. The specimen with which the letter was found is numbered 6, and is undated. All other
specimens numbered 6 are dated, two in 1885, and one in each of 1886 and 1887. However, the only specimen numbered 7 is dated 1884, implying that there was at least one no. 6
that year.
2
The pages are numbered 5 and 6; the preceding four pages of the MS are missing.
The more bulky specimens of the Lake plants I have packed in a little (50) cigar box
along with the fossil fruits and papers of algae. The smaller specimens I will enclose
with present letter — and of these
No1 with spike leaves in whorls I imagine to be of the
family — A better-class boy told me that it was in flower for a short time at a particular
season of the year he thought about Christmas.
Hydrocharidae
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No 2 had a slender green stem like that of many land plants, but its leaves were of
the colour & gelatinous consistency of brown seaweed
These two specimens were gathered at the end of last summer.
No 6 was gathered after the first rain — a floating grass which I fancied at the time
might be a natural inhabitant of the water, but thought afterwards, was much more
likely to be a land plant washed out by the lashing of the rising waters of the Lake.
The specimen was however at the time otherwise interesting from a growth, whether
of animal or vegetable formation, in the form of a nearly circular disk ¼ to 5
/
16 of an inch in diameter, binding together & including in its substance portions of
three or four of the grass blades and seemed to me at least, singular, in having all
round its edge a series of little straight sticks ranged at regular intervals round
the edge of and at right angles to, the disk & projecting projecting
to equal distances both above and below it, giving the whole quite the appearance
of a cogged wheel, or rather of a spiked wheel capable of driving two cogged wheels;
one above, the other below. Unfortunately, however, having placed this specimen with
others under a slight pressure nearly all these regular spikes got broken off & disappeared
the remains of a few being only left at one end, and these may also disappear before
the specimen reaches you.
3
Word repeated in going from one page to next.
The other Lake plants No 3 Blade and fruit of Sword-Sedge, No 4 Jointed Rush hollow
stem divided by numerous transverse membranes — and No 5 specimens of ordinary Rush
— are in little box with the fossil fruits, which I will take to Railway same time
as I post this.
The fossil fruits I endeavoured to describe in former letter
— The big but not handsome 'orange' I picked up myself. I would have sent two, but
box would not quite close on it. The supposed tooth found in the stomach of a barracouta
here, I send with the fruits It is much less fresh-coloured now, both in the bony
substance & the veins tinged with blood. I told McKenzie that I thought it might be
a Dugong's tooth as these animals are said to have 12 molars (& 2 incisors) fewer
when old that when young — but on second thoughts this solution seemed rather improbable
4
Letter not found.
Last letter my Cash a/c left me I think 15/ in your debt since then I have against
you box which cost 6d & Railway freight which will be 8d leaving balance against me
of 13/10d. This I thought of sending you as formerly proposed, but think it would
be better to defer it till I learn more of No 2 Racecourse — & of a claim being [made]
by a Chinese publican
Yours obediently
D W Spence