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No. 180: Eucalyptus Thozetiana,

F.v.M.

Thozet's Gum.

(Family MYRTACEÆ)

Botanical description.

— Genus, Eucalyptus. (See Part II, p. 33)

Botanical description.

— Species, E. Thozetiana, F.v.M., in "Eucalyptographia" (under E. gracilis), 1879.

This affords another instance of a plant imperfectly described ("Eucalyptographia") being distributed in herbaria, and then, years after, being adequately described. Mr. R. T. Baker first described it adequately from complete material. Following are almost entirely his words:—

An erect, graceful tree, rarely attaining a height of over 70 feet. [The average height given to me by Mr. C. C. Chapman is about 30 feet, and Mueller quoted 60 feet.]

Timber, brown or black brown, very hard.

Bark, smooth, compact, whitish, decorticating in hard short flakes at the base (Mueller).

Branchlets angular, but soon terete, reddish-coloured.

Juvenile leaves linear or narrow lanceolate.

Leaves mostly alternate, from lanceolate to oblong-lanceolate, under 6 inches long and half an inch wide, occasionally shining. Venation rather obscured in the thick epidermis; lateral veins sparse, oblique, distant; intramarginal vein removed from the edge. Oil glands numerous, but exceedingly small.

Flowers small on axillary peduncles or terminal panicles. Calyx turbinate, angled, gradually tapering into a short pedicel. Operculum conical, blunt.

Fruits small, oval-urnshaped, angled, under 3 lines long, and tinder 1 1/2 lines in diameter, valves depressed. (Proc. Linn. Soc. N.S.W, xxxi, 1906, 305.)

Botanical Name.

— Eucalyptus, already explained (see Part II, p. 34) Thozeliana, in honour of Anthèlme Thozet (?1826-1878), born in France, and a resident of Rockhampton, Queensland, for many years. He devoted the greater part of his life to the study of the cultivation and the economic products of Queensland plants and of interesting and useful plants generally. His end was hastened through the botanical exploration of Expedition Range, west of Rockhampton, and this species was found on his last trip. For fuller particulars see my "Records of Queensland botanists" in Proc. Aust. Assocn. for Adv. of Science (Brisbane Meeting, 1909), xii, 382.

Vernacular Names.

— I have given the name "Thozet's Gum" to this species. Mr. Baker proposes the name "Lignum Vitæ" for it, but that name is already applied to two Eucalypts, and to one, if not two, species of Acacia.




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Aboriginal Names.

— "Yapunyah" or "Napunyah" near Goondiwindi, according to Mr. C. C. Chapman. These names are, however, shared by E. ockrophloia, F.v.M. Synonyms. —

(1) E. gracilis, F.v.M., var. Thozetiana, F.v.M., in "Eucalyptographia" under E. gracilis.

(2)E. calycogona, Turcz., var. Thozetiana, Maiden, in "Critical Revision of the genus Eucalyptus," Vol. i, p. 82.

Leaves.

— Note their narrowness, and their slender, graceful character.

Bark.

— Evidently a smooth-barked species, with a little rough bark at the butt. Following are collectors' notes:—

"It sheds all the bark except that on the butt of the trunk." (Mr. E. Bowman, on a specimen from the Mackenzie River, from Rev. Dr. Woolls' herbarium.)

"Bark smooth, white, and entirely deciduous. The trunk is beautifully fluted, which appears to be a constant character of this species." (P.O'Shanesy.) This is interesting, for the Western Australian Gimlet Gum (E. salubris) is the only other species described with a fluted bark, so far as I know.

Timber.

— Mr. R. T. Baker says that it is harder than that of any other Eucalyptus timber known to him. That it is very heavy, close-grained and interlocked, has a chocolate colour, and resembles the Lignum-vitæ of commerce. He suggests its suitability for sleepers, posts, rails, bridges, cogs, mallets, &c.

Size.

— Messrs. E. Bowman and P. O'Shanesy found it attaining a height of 60 feet on the Mackenzie and Comet Rivers (Cometville).

"It is like a Mallee, but do not think it has the bulbous stock of a Mallee. The average size of the stems is a diameter of 7-8 inches, with a length of 25 feet (as poles drawn into the station), so that the length may be fairly put at 30 feet." (Mr. C.C. Chapman, of Newinga.)

These two localities are some hundreds of miles apart. It is evidently a very large tree about Cometville, and it may be that it does not attain its greatest size even there.

Habitat.

— Originally found on the Expedition Range, say 120 miles west of Rockhampton, by M. Thozet.

Mackenzie River (E. Bowman); Comet River, at Cometville, (P.O'Shanesy).

These two rivers run into each other at Cometville. Warrego River (F.M. Bailey).

No part is stated; Cunnamulla and Charleville are on the Warrego. Flinders River, probably, but not very good specimens (F.M. Bailey). Tandwanna, a few miles north-west of Newinga (C. C. Chapman).




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Plentiful at Newinga Station, which is 65 miles west of Goondiwindi. Newinga is on the Barwon or Macintyre River where it separates New South Wales from Queensland. I have not actually got it from the left (New South Wales) bank, but it is very abundant on the right bank, and it is the usual practice, when a species occurs on the border line of two States, to record it for both States. At the same time I hope collectors will look out for it actually within New South Wales territory. Baron von Mueller told me that when a species was recorded 15 miles from a border he recorded it in both States. That may turn out to be correct in practice, but it would be desirable to use this assumption very carefully.

The localities for E. Thozetiana therefore, so far as we know them, are the typical one of the Expedition Range and the Mackenzie and Comet Rivers (say Cometville) in the same district; secondly, the Goondiwindi district, on the New South Wales border of Queensland, with the Warrego as an intermediate locality.

It is evident that the species is of wide range, but we require very much more collecting to definie that range, and to put us into possession of more facts concerning this interesting species.

EXPLANATION OF PLATE 184.

Plate 184: Thozet's Gum. (Eucalyptus Thozetiana, F.v.M.) Lithograph by Margaret Flockton.



  • A. Sucker leaves from Newinga Station, St. George, Goondiwindi Rd., Q.
  • B. Twig with buds and fruit. From the type, Expedition Range, viâ Rockhampton, Q. (Thozet).
  • C. Flowering twig from the Mackenzie River scrubs. (Herbm. of late Rev. Dr. Woolls).
  • D. Anther.

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