A New Plant in our Scrub

A new plant has been found in Franke Scrub.

It is a tiny little mistletoe called Korthalsella japonica forma rubra. You can see why it is known as "zygocactus mistletoe".

This mistletoe grows on a number of different dry rainforest plant species, and in our case it's growing on a Yellow Condoo tree, Pouteria cotinifolia.

Korthalsella species (of which there are probably two on the Downs) are the only known host plants for the Yellow-spotted Jezebel butterfly. We have seen this butterfly in Franke Scrub. You wouldn't imagine that such a small plant could host very many caterpillars, but it must be doing the trick! Our little jezebel population may be a thing of our very own, possibly isolated from any other likely source of host plants, now that clearing has reduced our local evergreen vine thickets to such small remnant pieces.

Mistletoe Regrowth

Amyema lucasii
We were distressed to find, last summer, that some person unknown had been ripping the Lucas Mistletoe off our beautiful Leopard Ash tree. Various theories were propounded: that it was an piece of ordinary mindless vandalism; that it was the act of a “do-gooder” who believed that he or she was actually helping the tree; and that it was a case of theft by some greedy person who wanted the wood for wood-turning, and saw no reason not to steal public property.
Whatever the cause, it left a large branch looking bare and ugly, as it has no other leaf growth than that of mistletoes.

So it’s a relief to see it regrowing. We can expect the mistletoe to behave like any other plant after a severe pruning. It may miss flowering this season, but will be refreshed and look more beautiful than ever.


It has also been rather interesting to discover that the branch itself is still alive, despite the absence of any of its own leaves.
Meanwhile, the rest of the tree is demonstrating the ability that trees have, of killing off mistletoes when under stress. You will notice that it is carrying quite a few dead mistletoes. They were probably been killed off as the tree closed down the water supply to its smaller branches, something that all drought-hardy trees can do whenever they are stressed for lack of water.
I may be wrong, though. Mistletoes have a short life-span compared to that of trees like this one, and they may simply have reached their use-by date.
We have been noticing that this tree carried a rather heavy load of mistletoes, and wondering whether they were stressing the tree during the long drought. It seems we don’t have to worry, as Nature has taken care of the problem. We will probably see renewed vigour in the canopy as a result, and may be able to look forward to a beautiful flowering season this October.
Trish Gardner

Mistletoes

Amyema lucasii Lucas’s Mistletoe

Amyema congener Variable Mistletoe

Viscum articulatum Jointed Mistletoe