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38. XXXVII. Eucalyptus Boormani, Deane and Maiden.

         
PAGE  
Description  330 
Notes supplementary to the description  330 
Range  331 
Affinities  331 




  ― 330 ―

Description.

XXXVII. Eucalyptus Boormani, Deane and Maiden.

Proc. Linn. Soc. N.S.W., xxvi, 339 (1901).

Bark.—Dark in colour, often very dark grey and even black. In texture scaly, sometimes hard scaly, and even in parts nearly as rugged as an Ironbark, but never as soft as a Box. The rough bark extends to the small branches.

Timber.—Pale reddish-brown in colour, hard and durable, and, according to the testimony of many observers, while of an Ironbark character, even superior to the Ironbarks of the district in which it grows.

Suckerleaves.—Broad and coarse, nearly orbicular, but early becoming lanceolate.

Mature leaves.—Ovate-lanceolate to lanceolate, usually 3 to 6 inches long, and over 1 inch in breadth; veins fine and rather spreading, the intramarginal vein usually quite close to the edge. Texture of the leaf coriaceous and tough, like that of E. siderophloia.

Buds.—The buds and stamens appear to us not to differ from those of E. siderophloia.

Operculum.—Conical, like that of E. siderophloia, but we have not observed the operculum much to exceed the calyx, which is very commonly the case in E. siderophloia, especially in var. rostrata.

Fruits.—Nearly semiovate, often slightly angular, usually presenting a good deal of resemblance to those of E. siderophloia, but the valves (which usually number four, and sometimes five) scarcely exserted. About three to four lines in diameter, and not contracting at the orifice. Sometimes so subcylindrical in shape as to exhibit considerable resemblance to those of typical E. hemiphloia, F.v.M. (op. cit.).

Notes supplementary to the description.

Named in honour of John Luke Boorman, Collector, Botanic Gardens, Sydney, who, in regard to this and other species, has prosecuted inquiries in an intelligent and painstaking manner.

The name “Black Box” seems to be most generally in use for this species; the even better name of “Ironbark Box” (which certainly indicates its affinities) is nearly as frequently in use. At Lue it is also called “She Ironbark,” its difference from the ordinary Ironbarks being thus recognised.

This seems to me to be a natural hybrid between E. siderophloia, Benth., and E. hemiphloia, F.v.M. The evidence available is published by Mr. Henry Deane and myself in Proc. Linn. Soc. N.S.W., xxv, p. iii (1900), and xxvi, p. 339 (1901). Later on, xxx, p. 494 (1905), I drew attention to the remarkable discovery by George Caley (botanical collector in New South Wales, 1800–1810), of hybridisation between E. siderophloia and E. hemiphloia.

As it is my intention to publish, later on, an account of hybridisation in Eucalyptus, with necessary illustrations, I will not present the evidence at this place.




  ― 331 ―

Range.

BANKSTOWN and Cabramatta districts; thence across country to Penrith. It has also been found at Lue, on the Mudgee line.

Affinities.

1. With E. leptophleba, F.v.M.

It seems to have its closest affinity to E. leptophleba (drepanophylla). Further investigations may even cause it to be looked upon as a southern form of the Queensland species; but the latter is always described as an Ironbark, and the imperfect specimens of the type that I have hitherto had the opportunity of seeing present differences in the fruit and leaves which caused Mr. Deane and me to form the opinion that the interests of science would best be served in giving the former a name.

2 and 3. With E. siderophloia, Benth., and E. hemiphloia, F.v.M.

When young it has the flattish bark often seen in young E. siderophloia. The foliage, inflorescence, and fruits show obvious resemblance to that species, while its other resemblances to this species, and also to E. hemiphloia, have been already referred to.

4. With E. affinis, Deane and Maiden.

It has undoubted affinity to E. affinis, particularly in the timber and bark. At Lue they are both called “Black Box,” and so far as specimens in my possession go, I cannot separate the trees, either in timber or bark, except with difficulty; the leaves also are much alike in texture and venation, but the fruits are very dissimilar.

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