400 
PROCEEDINGS OF SECTION D. 
we obtain a healthy root, which is of the first importance. Following 
up this subject, T would strongly urge upon growers of fruits of the 
Orange family in Northern Queensland the advantage of cultivating 
the Bussell River Lime, Citrus inodora , Bail., for stocks. In habit 
this species approaches much nearer to the cultivated kinds than the 
other indigenous species of Citrus. I should much like to see this 
new species brought into cultivation, so that its flowers might be 
fertilised by pollen from the best lemons and limes in cultivation, the 
object being to obtain a root more suitable to the climate, and still a 
first-class fruit. I may also remark, in passing, that this family does 
not take readily to cross-fertilisation, so that a failure now and again 
must be expected. 
While on the subject of stocks for fruit trees, I would like 
some of our tropical fruit-growers to obtain from the scrubs of the 
Barron River young plants of Pygeum Turner ian urn, Bail., and try 
the experiment of grafting upon them various kinds of plums. The 
genus Pygeum is very nearly allied to Prunus, and should the experi- 
ment prove a success it would be of great advantage to the tropical 
fruit-growers; and I see no reason why a union should not take place 
between these two plants, as in other natural orders far more 
dissimilar plants are used for stocks to graft and bud upon. 
VII.— ‘ VARIEGATION AMONGST QUEENSLAND PLANTS. 
As this diseased condition of the leaves and stems of plants is 
by the florists highly prized for decorative purposes, it may be well to 
notice those amongst our indigenous and naturalised plants 'which 
have been observed to be so affected. There have been many con- 
jectures, but up to the present the cause of the disease is unknown. 
My friend, Dr. Thos. L. Bancroft, has observed that these variegated 
plants are more frequently to be met with amongst the young growth 
which springs up after a scrub has been burnt. I have usually found 
it on plants in small scrubs bordering creeks and rivers. It is 
found to take place at times in seedlings, but more frequently it occurs 
upon a single shoot or brauch, when, if it is desired to perpetuate the 
form, resort must be had to the usual modes of propagation — viz., 
slips or cuttings, budding, grafting, layering, &c. It is seldom that 
one meets in the wild bush with a whole plant or even a large portion 
of a plant so affected, which is probably due to the more luxuriant 
growth of the healthy portion outgrowing and smothering these 
diseased parts. The florists, however, might find it to their advantage 
to look up and perpetuate many of the wild forms of this kind, for 
the marking and colouring at times are very effective. The following 
few plants, which have been noticed in a wild state to bear variegated 
foliage, are given to assist the lovers of these curious growths in their 
search : — 
Genera and Species, Habitat, Local or Aboriginal Name, and Order, respectively : — 
Malvastrum tricuspidatum, A. Gray; Brisbane; Malvaceae. 
Hibiscus t ilia ceu s, Linn.; Coast; Cotton-tree, Talwalpin of the 
natives of Moreton Bay and Johnstone Rivers; Malvaceae. 
Cor chorus Cunninghamii , F. v. M. ; Enoggera ; Tiliaceae. 
Acronychia Ice vis, Forst. ; Taylor’s Range; Rutaceae. 
