• 1. E. micrantha, DC.
  • 2. E. signata, F.v.M.

1. E. micrantha, DC. Following is the original description:—

Operculo conico cupulae longitudine, pedunculis angulatis petioli longitudine axillaribus et subterminalibus, umbellis 15–20—floris, foliis oblongis coriaceis basi attenuatis longè acuminatis nervulis antè marginem confluentibus. In Novâ-Hollandiâ, Sieb., plant ex. n. 497. Folia utrinquè lucida, petiolo semipollicari, laminâ 6–7 poll. longâ, pollicem latâ, venis penniformibus. Alabastra ovoidea generis minima.—(Prod. iii, 217.)

I have examined Sieber's No. 497, and it is var. micrantha.

2. E. signata, F.v.M. This is described in Journ. Linn. Soc. iii, 85 (1859). Mueller quotes for his type specimens,—“In hills and wooded grassy hills near the Brisbane River.” Also Macarthur's Sydney Woods, Paris Exhibition, No. 163 in herb. Hook. He also states that it is called “Spotted Gum” in the Moreton Bay district.

I have a specimen of Mueller's type from Kew, besides which I saw it at Kew. It is typical var. micrantha.

Macarthur's specimen was exhibited under No. 163 for the Paris Exhibition of 1855 and under No. 30 for the London Exhibition of 1862. His label is, “Aboriginal name in Cumberland and Camden, ‘Caarambuy.’ Known as ‘White Gum.’ Diameter, 24–40 inches. Height, 60–80 feet. Not much valued, being generally of crooked growth.” This also is typical var. micrantha.

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Following is a doubtful form, and I am not yet satisfied as to whether it can be separated from var. micrantha, although the authors think the two forms are identical.

E. Rossii, R. T. Baker and H. G. Smith, “Research on the Eucalypts,” p. 70 (1902). See also Proc. Linn. Soc. N.S.W., xxviii, 352 (1903).

The authors give E. micrantha, DC., as a synonym, and state, “Research on the Eucalypts,” p. 71: “Leaves were obtained (for oil) from Cow Flat, Bathurst.” In the following year Mr. Baker (op. cit., xxviii, 352) says: “Camboon is the only locality I have collected it” (so that we really have two localities). Bungendore (see oil analysis) is a third locality. See also xxi, 448.

The authors, op. cit., p. 71, say: “The oil had no resemblance to that of E. hæmastoma of Smith, the ‘Scribbly Gum’ of the coast.”

Under E. hæmastoma, Sm., the authors give E. signata, F.v.M., as a synonym, and this is identical with E. micrantha, DC., as already shown.

The analyses of the oils of E. hæmastoma and E. Rossii, as given by the authors, are herewith:—

Species  Whence collected for oil.  Specific gravity at 15°C.  Specific rotation [a]D   Saponification number.  Solubility in Alcohol.  Constituents found. 
hæmastoma …  Barber's Creek, N.S.W.; Gosford.  0.9195  -32.77° (first fraction).  5.1  Insoluble  Phellandrene, eucalyptol, sesquiterpene. 
Rossii …  Cow Flat, Bathurst; Bungendore.  0.9168 to 0.9215  +7.8° to +7.9°  7.95  1¼ vols. 70 

The type specimens (from Camboon) have pale-coloured foliage. An umbel of flowers and a leaf are figured by Mr. Deane and myself at fig. 14, Plate xxxi, and an umbel of fruits from the Grenfell District is figured at fig. 13 of the same Plate (Proc. Linn. Soc. N.S.W., xxii, 1897). In the legend of the Plate the Grenfell fruits are described as having “thin long pedicels and flat-topped sharp-rimmed fruits. Sometimes there are twenty in a head.”

The Grenfell and Camboon specimens have much in common, and, except in the number of flowers in an umbel (not a very definite character), I see no difference between them. As regards the sharp-rimmed fruits of the Grenfell specimens, we have them sometimes not sharp, and they seem identical with those of Camboon.

Camboon timber “is very hard, red coloured, and durable, and is far superior to that of E. hæmastoma” (R. T. Baker). Mr. Forester Postlethwaite, who collected the Grenfell specimens and was a sound bushman, says: “Quality of timber indifferent.”

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I have specimens which are very close to Mr. Baker's E. Rossii from Adelong (also from a local forester who did not append his name to them).

The anther of (?) E. Rossii is depicted at fig. 15, Plate 47, and it seems to be more compact, less reniform, and with the cells less divergent than those of E. hæmastoma usually are. Compare figure 14d of the same Plate.

I do not see my way to withdraw E. Rossii from E. hæmastoma, var. micrantha, with such evidence as I have at present. It seems that the Grenfell specimens connect the coastal specimens of var. micrantha, and both Camboon and Grenfell have more or less western climatic influence, so that we expect some difference.