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CCLXVIII. E. Brownii Maiden and Cambage.

In Journ. Roy. Soc. N.S.W., xlvii, 215 (1913).

FOLLOWING is the original description:—

Box tree mediocris, circiter 40' alta, erecta magis quam dependens. Cortex dura, lamellosa. Folia juvenilia lanceolata vel angusto lanceolata. Folia matura lanceolata, 10–15 cm. longa, 2–3 cm. lata, venis lateralibus angulo 30° ad costam mediam.

Alabastri parvi, clavati, operculum hæmisphæricum, umbella quaque 3–9 in capite. Fructus parvi, conoidei, circiter 3 cm. diametro.

We propose the name in honour of the great Robert Brown, who (amongst other parts) is closely identified with the botany of Northern Queensland.

A medium-sized Box-tree, about 40 feet high, erect rather than drooping.

Bark.—Hard thin flaky Box-bark, on the trunk and large branches, the ultimate branchlets smooth.

Juvenile leaves.—Lanceolate or narrow lanceolate. Generally long and narrow, petiolate, equally green on both sides, and slightly shiny, venation distinct, spreading, intramarginal vein distinct from the edge. Size say 20 by 2 cm.

Mature leaves.—Lanceolate; except as regards the size, the description of the juvenile leaves applies. Size say 10–15 by 2–3 cm. Lateral veins arranged at angle of about thirty degrees with the midrib.

Buds small, clavate, operculum hemispherical or slightly umbonate, and about half the length of the calyx-tube, which tapers gradually into the pedicel.

Flowers.—Inflorescence paniculate, the individual umbels three to nine in the head.

Anthers semi-terminal, nearly globular in shape, opening in small pores on each side near the top. Filament at the base, small gland on the top.

Fruits.—Fruits small, conoid, about 3 cm. in diameter and the calyx-tube about the same length, tapering, not perfectly gradually, into the pedicel, rim thin, tips of the valves flush with the orifice, which is not constricted.

Range.

It is confined to Northern Queensland, so far as we know at present.

Type from Reid River, near Townsville (N. Daley, Sept. and Dec., 1912).

Wirra Wirra, Almaden to Forsayth, North Queensland, growing on a somewhat sandy-conglomerate formation which furnishes a more siliceous soil than that usually selected by Box trees. (R. H. Cambage, No. 3895, August, 1913.)




  ― 195 ―

“After the 115th mile-post was passed, an undescribed species of Eucalyptus appeared (E. Brownii Maiden and Cambage, these Proceedings, 1913, p. 215). The note made in the train conveys a general description of the tree, and reads:—`A narrow-leaved Box, seems distinct species, rough bark on branches, green leaves.' These trees were growing on a contorted, micaceous slate formation showing quartz, but they continued intermittently to Wirra Wirra, where the rock is sandstone, possibly Upper Cretaceous. This Box tree averages about 40 feet high, with small fruits, and according to Mr. Thomas Keller, of Wirra Wirra, has dark-red timber.” (R. H. Cambage in Journ. Roy. Soc. N.S.W., xlix, 413, 1915.)

Synonyms.

E. bicolor A. Cunn., var. parviflora F.v.M., Burdekin River (see B.Fl. iii, 215), E. populifolia F.v.M., non Hook.

Scrub Box tree of the Burdekin River, but not the Box tree of the Suttor River, labelled as above, which is E. populifolia Hook. All the above specimens were examined by Mueller, and apparently by Bentham also.

Affinities.

Its closest relations are with two species—E. populifolia Hook., and E. bicolor A. Cunn. Both are indicated by the labels of both Bentham and Mueller.

1. With E. populifolia Hook.

To the typical form of E. populifolia the resemblance is not close, but there is a narrow-leaved form of the species to which the resemblance is closer. The differences lie in the bark, which is less flaky in populifolia, in the more conical fruits of E. Brownii, and particularly in regard to the position of the intramarginal vein, which is much more removed from the leaf edge in E. Brownii.

2. With E. bicolor A. Cunn.

The differences appear to be the duller colour of the foliage of E. bicolor, that of the new species being a vivid green, its less spreading venation and less conoid fruits. E. Brownii has not the weeping habit of E. bicolor.

There is a specimen in the Melbourne Herbarium labelled “near Mount Elliott, Queensland, Fitzalan and Dallachy,” which appears to be E. Brownii. The late J. G. Luehmann has a note “Placed by Bentham with E. largiflorens (bicolor), seemingly with injustice. F. v. Mueller.”

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