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CCLXXIX. E. Dalrympleana Maiden.

In “Forest Flora of New South Wales,” vol. vii, Part IV, 137 (1920).

FOLLOWING is the original description:—

White Gum grandissima, cortice sæpe maculis claris et lamellis longis tenuibus secedente, ligno carneo. Foliis juvenilibus pallidis cordatis vel orbicularibus vel ovoideis, amplexicaulibus, sessilibus vel brevissime petiolatis. Venis patentibus, recticulatis. Foliis maturis petiolatis, lanceolatis, falcatis rare minus 1 dcm. longis et 2 cm. latis, venis patentibus vena peripherica a margine distinete remota. Inflorescentia axillare, 3 floribus breve pedicellatis cruciformibus. Alabastrorum calycis-tubo cylindroideo, angulare, operculo conico æquilongo margine commissurata distincte. Fructibus truncato-ovoideis, ca. 8 mm. diametro, margine rotundata vel plana, non lata, valvis 3 vel 4 mediocriter exsertis.

A large tree, sometimes attaining an enormous size. “I have seen them 30 feet in girth, with a barrel of almost 100 feet. They are generally 15 or 16 feet in girth. Known locally as `Mountain Gum' or `White Gum.' The trees present a remarkable appearance. During early spring the bark is quite white, but later this changes to a vivid red (sometimes almost vermilion), and the trunks have the appearance of being painted in large irregular blotches. Timber pinkish in colour, and dries irregularly.” (W. A. W. de Beuzeville.)

Branchlets angular, juvenile leaves scabrous in the earliest stage, pale-coloured, cordate to orbicular or ovoid, stem-clasping, sessile, or with very short petioles, with a short innocuous point; 5 cm. long and 5 cm. broad are average dimensions. Venation spreading, reticulated, the leaf dotted with black spots, scarcely seen with the naked eye.

Mature leaves petiolate, lanceolate, usually more or less falcate, rarely under 1 dm. long and 2 cm. wide, venation spreading, intra-marginal vein distinctly removed from the edge; black-dotted.

Inflorescence axillary, petioles flattened, under 1 cm. long, supporting three shortly pedicellate appressed, rarely cruciform, flowers of medium size. The buds with cylindroid calyx-tube, angled, with a conical operculum of equal length. Commisural rim marked. Anther small, opening in parallel slits. Gland at the back.

Fruits truncate-ovoid, about 8 mm. in diameter, rim rounded or flat-topped, not broad, valves three or four, moderately exsert.

Named in honour of Richard Dalrymple Hay, Chief Commissioner of Forests of New South Wales, whose name will ever be connected with his arduous endeavours, extending over a number of years, to place the working of the forests of New South Wales on a sound basis.

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The typical form is found in the Yarrangobilly, Batlow, and Tumberumba districts, and it has been found in the mountainous country in the counties of Wellesley, Wallace and Selwyn, in south-eastern New South Wales. It has been so long confused with other White Gums, that there is little doubt that its range will be very greatly extended on critical inquiry.

It undoubtedly occurs in the adjacent country in Gippsland, Victoria. It is highly probable that the “broad-suckered viminalis” from Tasmania (e.g., Hobart), (Chimney Pot Hill, L. Rodway) and Sheffield (R. H. Cambage), and the Dee (J.H.M.), referred to in my paper in Proc. Roy. Soc. Tas., 1918, p. 88, belongs to this species.

Following are some representative specimens from New South Wales:—

“A Mountain Gum.” Peppercorn Plain, Yarrangobilly, about 20 miles north of Kiandra, elevation about 4,700 feet. W. A. W. de Beuzeville, Nos. 1, 2, 3. A large tree as described in his letter, No. 409120, January, 1920. (The type.)

“Mountain Gum,” Bago Forest Reserve, Batlow district (de Beuzeville, No. 1, January, and also March, 1917).

“A White Gum,” Yellowin Creek, Bago Forest Reserve (de Beuzeville, No. 2, January, 1917).

“Large Gum-trees,” Laurel Hill, Tumberumba (R. H. Cambage, No. 847). Considered at one time as coming between E. rubida and E. ovata (acervula).

“This is like a broad-suckered. E. viminalis, but the timber is much inferior to the ordinary. This tree grows generally on poor soil, and is usually stunted. Occasonally a large specimen may be seen growing with the ordinary viminalis.” Tallaganda Forest, Braidwood-Queanbeyan district (W. A. W. de Beuzeville, October, 1918, No. 14).

“An inferior White Gum,” Parker's Gap, same general locality (de Beuzeville, October, 1918, No. 5).

(Mr. de Beuzeville's No. 9, same place and date, is called “Ribbon Gum,” and has the conventional narrow suckers of E. viminalis.)

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This question has been dealt with at length at “Forest Flora,” p. 138, to which my readers are referred, and it will be sufficient to give the following table showing the differences between it and E. rubida Deane and Maiden and E. viminalis Labill., the two nearest species:—

1. Dalrympleana 2. rubida 3. viminalis
Size and habit of tree.  Very large, erect, non-glaucous tree.  Not very large; smaller than E. Dalrympleana. Grows on poorer soils. Glaucous.  Frequents good moist soil. Large size. 
Bark … …  Smooth, spotted or patchy, very thick; sometimes 2 inches thick. More or less rough at butt.  Smooth, spotted or patchy, thickish, but not so thick as that of E. Dalrympleana Moderately thick; not very patchy; much less ribbony than the other two. 
Timber … …  Pale - coloured, shrinks irregularly. Not much tensile strength. Valuable for building purposes, when kept under cover. Valuable for paper-pulp.  Much more brittle than that of E. Dalrympleana Good. Few gum-veins. 
Seedlings and Suckers.  Broadish; glaucous, but less so than those of E. rubida Broad, glaucous … …  Narrow, non-glaucous. 
Mature leaves …  Non-glaucous … … …  Dull green, or glaucous …  Non-glaucous; have sweet ethereal smell. 
Buds … …  Elongated, usually in threes. Rarely cruciform. Has a flowering season in its type locality, nearly a couple of months earlier than E. rubida   Ovoid, often glaucous. Operculum nearly hemispherical. Usually in threes, cruciform.  Same as (1). Usually in threes. 
Fruits … …  Nearly globose, with very protruding valves, usually about 6 mm. diameter. Banded rim.  More urceolate. Top-shaped; 3 lines diam. Less banded. Smaller than those of (1).  Like (1). 
Found on easterly and northerly slopes in its type-locality (Tumberumba district).  Found on westerly and southerly slopes (Tumberumba district).  Most usually found on river or creek banks.