360% . PROCEEDINGS OF SECTION D. 
D.—£. Risdoni, Hook. f. (Hooker’s Lond. Journ. Bot. vi. 
477, 1847. Fl. Tas. i. 133. t. 24). 
I have examined the following types : — 
(a) R. Gunn’s No. 1278, from Herb. Kew.—‘‘ Small 
tree growing in clusters on the side of a hill 
near Risdon, 10-20 ft. high, branched from the 
base, Oct. 1840. R. Gunn.” 
(6) 1072, R. Gunn. Risdon, Hobart, 10.10.40. 
HL. perfoliata, R. Br. (B. Fl. iii. 253),-is a Northern 
Territory shrub. There is, however, H. perfoliata, R. Br., 
in Herb. Kew., which is #. Risdoni, Hook. f. The name 
_ perfoliata was loosely employed in regard to Eucalypts 
by the early botanists. (See Proc. Linn. Soc. N.S.W. 
1901, 550.) 
EL. connata, J. Schauer, from Tasmania, in Herb. Vienna, 
is L. Risdon. If this species was described it would 
perhaps take priority of Hooker’s name. J. perfoliata, 
Tausch, in the same herbarium ex Herb. Ferd. Bauer, is 
also #. Risdon. 
The affinity of #. amygdalina to EH. Risdon is un- 
doubtedly close, the relationship being closest through the 
var. elata of the latter. #. Risdoni has broad sucker leaves, 
and on this character alone I would retain it as a species 
distinct from H. amygdalina. At the same time, it passes 
into.#. amygdalina by innumerable gradations. 
If #. Risdoni be abandoned, then L£. dives must be 
abandoned, a strong species in my opinion. 
The bark of /. Risdoni is smooth; that of #. amygdalina 
is always fibrous* on the butt; this is an important 
character. 
In these days the determinations of Eucalypts by the 
older botanists are carefully criticised, in view of the 
extensive field knowledge of the genus we now possess, and 
which is becoming increasingly accurate, but the following 
remarks by Bentham (B. FI. iii. 203) seem to be quite 
accurate : — 
“F, Mueller also unites #. Risdoni altogether with #. 
amygdalina. J.D. Hooker and Oldfield, both of them from. 
observations made on the spot, have assured me that the 
two are quite distinct, in habit as well as in the bark. The 
* Mr. Rodway writes to me, “ Many forms of undoubted E. amygdalina 
are smooth-barked from the butt.’ Nevertheless, in view of the un- 
certain position of EZ. linearis, I prefer to leave my remarks on the bark 
to stand for the present. 
