214 

As regards () I look upon these trees as depauperate E. polyanthemoa, the 
result of environment, being "found on poor sandstone country." The timher is 
usually pipy and of little use for works of construction, when grown under hard 
conditions. 
(b) There is a slip here. E. polyanthemoa does not extend to the coast. 
Perhaps Mr. Baker is referring quite excusably, as so many botanists before him, to 
E. Baueriana Schauer. 
(c) All three " varieties " are found in a very circumscribed area in the 
Rylstone-Goulburn River district, and that should be borne in mind in comparing 
them with E. polyanthcmos over the whole of its area. 
We now come to E. Dawsoni R. T. Baker. 
Eucalyptus Daicsoni R. T. Baker, Proc. Linn. Soc. N.S.JT., xxiv, 295 
(1899), with a plate. 
Following is the original description : 
A tall tres with a smooth birk, the foliago, branc'ilets, buds, and fruits glaucous. Young leaves 
broadly lanceolate, 6 inches long and over 3 inches wide, on a petiole over an inch long, very obtuse, 
glaucous on both sides, venation distinct. Mature leaves mostly short, oblong-lanceolate, very obtuse, 
rarely acuminate, occasionally reddish in colour, venation fairly distinct, lateral veins not distant, intra- 
marginal vein close to the edge. Peduncles axillary, but mostly in large terminal corymbs, exceeding the 
leaves. Buds on young trees 3 lines long, 1J lines in diameter, sessile or on short pedicles; operculum 
hemispherical, obtuse ; on mature trees 4 to 5 lines long, 1 lino in diameter, the calyx tapering into a 
filiform pedicel, operculum conical, acute. Ovary domed at the summit. Stamens all fertile, inflexed in 
the bud, filaments thick in proportion to the diameter of the anthers. Anthers very small, cylindrical, 
rounded at the base and truncate at the top, opening by terminal pores. 
Fruit small, tnrbinate, pedicel almost filiform, mostly a line in diameter and under 2 lines long, 
rim thin, capsule sunken ; valves not exserted. 
This species is one of the finest representatives of the genus Eucalyptus, whether from a 
picturesque or an economic point of view. On the whole watershed of the Goulburn lliver it grows to a 
great height with a splendidly straight, branchless trunk, and always occurs under the ridges, never being 
found on the summit nor at the base ; and owing to its glaucous leaves it can easily be detected from the 
dark green foliage of its congeners the Stringybarks in this particular instance. 
I was at one time (loc. cit.) inclined to class this species as a variety of E. polyanthema Schau., 
owing to the similarity of fruit and colour of timber, but a further examination of the various parts of the 
tree and the aid of chemistry have led me to alter my earlier opinions. 
The sucker and mature leaves of both species are different, as well as the venation. The leaves of 
"Slaty Gum" arc almost always glaucous, as well as the buds and fruits, a fejitun- rarely found in 
/-'. jiolyanthcma Schau. 
Following arc Mr. Baker's notes : 
The smooth bark and reddish timber give it some affinity with E. polyanihema, 
but it differs from this species in other characters and products (page 29G). These 
differences of the two species are, however, not contrasted. 
It, in botanical sequence, is placed after the former (E. polyanlhemos) 
(page 29G). 
Following are the " Slaty Gums " in this herbarium. I do not say that all 
Slaty Gum is what is known as E. Datcsoiii. Some of it may be E. ovalifolw var. 
