355 



At one time I thought I could keep E. aggregate/, and E. Rodwayi apart, 

 (a) by the intramarginal vein being nearer the margin in the latter, and (b) the fruit 

 being larger in the latter. But examination of a fairly large series of specimens shows 

 that these differences do not really exist. 



The following notes on E. aggregata and E. Rodwayi, hitherto unpublished in 

 this work, will be useful. 



1. " Black Gum, also known as Swamp Gum and Apple-scented Gum (Eucalyptus Stuartiana F.v.M.). 

 A medium-sized, widely-spreading tree. Bark sub-fibrous, dark, persistent to the branches. Leaves 

 narrow, lanceolate, often slightly unequal-sided, thick and often shining; juvenile foliage opposite, sessile, 

 orbicular, to oblong. Flowers small, many in the umbel; operculum conic. Fruit obconic, usually under 

 3 millimetres diameter, valves protruding. 



The form described above corresponds with specimens sent out by Mueller as typical of the tree 

 described as E. Stuartiana in his " Eucalyptographia." Unfortunately, Mueller tried to bring in many 

 other forms under the same name, which led to some obscurity. Deane and Maiden consider the tree, 

 common in Northern Tasmania, and described above, to be distinct from Mueller's tree, and named it 

 E. aggregata. R. T. Baker considers it to differ further, and calls it E. Rodwayi. 



It may be readily distinguished from Ovate Gum (E. ovala.) by the fibrous bark, narrower leaves, 

 and smaller fruits." (Rodway, Proc. Roy. Soc. Tas., 1917, p. 20.) 



2. " Rodway, this Journal, 1917, p. 20, refers to the Tasmanian tree as Black Gum (a name it shares 

 with the typical New South Wales form). His reference to E. Stuartiana is to one of the three trees success- 

 ively named E. Stuartiana, and the Tasmanian tree is the one that I have distinguished under the name 

 Stuartiana prima (see C. R. XXI, p. 4). Seedlings from seeds sent to me by Mr. Rodway from Tasmania, 

 in December, 1917, precisely match those of typical aggregata. 



I gave some attention to this species on my recent visit to Tasmania. Juvenile leaves vary from 

 narrowish to broadish. There are minor differences in the Tasmanian as compared with the New South 

 Wales specimens, but nothing that seems important to me, nor not easily explained by an environment 

 a thousand miles away from the type. 



I collected it 15 miles from the Ouse (Victoria Valley P.O.), on the Dee Road. Here I got buds, 

 flowers, and fruits of a flaky barked gum, the tree being of small size. At the Dee this grows into shapely 

 trees of good size. They have a fibrous bark on the butt, with smooth branches; small fruits. A local 

 resident called it Black Peppermint, but I think this name should be reserved for E. amygdalina . My 

 informant had probably heard it called Black Gum and corrupted the name." (Maiden, op. oil., 1918, p. 82.) 



Following is an additional Tasmanian locality : — 



" Trees 50 up to 120 feet high, 2-3 feet in diameter, one 4 feet. Bark flaky 

 on base and trunk, grey, not so fibrous as in E. amygdalina. Branches dirty white, 

 with flaky bark. Leaves free and somewhat shining, and have not the scent of 

 E. amygdalina, Opossums feed on the young leaves. I could find no seedlings which 

 were not nibbled. In basaltic soil at about 2,000 feet level. Guildford Junction, 

 Tasmania." (R. H. Cambage, No. 4101, January, 1911.) 



The allusion to E. amygdalina is explained by the references to Mr. Archer's 

 Cheshunt specimen, (a), Part VI, of the present work, p. 158 (E. radiata Hook. f. var. 5), 

 referred by me to E. amygdalina var. nitida, and figured at fig. 2, Plate 31, also (b), 

 p. 86, Part XXV, placed under E. aggregata. In other words, E. amygdalina var. 

 nitida Maiden, or E. radiata Hook. f.. non Sieb., are synonyms of E. aggregata. 



