More than an Oak

I noticed a strange looking structure on the trunk of an oak at Kenilworth Park and Aquatic Gardens. It is easy to imagine that it is the head of monster coming out of the tree with orange eyes!

It is probably a crown gall caused by a bacterium (Agrobacterium tumefaciens) which enters the tree through a wound; in this case it could have been a branch that broke. The bacterium transfers a portion of its genetic material into the oak tree cells causing the unusual growth and some substances that the tree does not normally produce – but that the bacterium utilizes! The gall can impede nutrient flow in the tree -particularly if it girds the tree.

In this case, the gall itself appears to be hosting some shelf fungus – the bright orange structures. The tree looked robust overall and the only place where shelf fungi were growing was on the gall. So maybe the shelf-fungi are doing their normal decomposer role on the gall only! I’ll look for the tree again summer when we go to see the lotuses at Kenilworth.

Lotus Seed Pods

By mid-July many of the lotuses had dropped their petals and the seed pods were green with mounds where the seeds were developing underneath.

There were some that already had a single seed that was mature. This one also had one co-joined mound; I wonder if the seed was a double seed that was joined underneath.

Gradually more seeds mature and mounds become holes.

And then even more of the seeds are open to the air.

Many of the pods still seem to follow the sun just like the flowers do. Some are relatively smooth from the back

While others are convoluted.

Eventually the pod will be emptied of seeds and dry. The pods are often used in dry flower arrangements in the fall.

More Dragonflies (at Kenilworth Gardens)

I posted some dragonfly pictures from Kenilworth Park and Aquatic Gardens earlier in the month but then we made more visits to the place and I got some even better pictures by zooming in even more (and using a monopod to stabilize the camera). It is easier to see wing damage (lower left wing) and how the wings attach to the insect.

Their heads and legs have more bristles than I expected…and there is a ‘face.’

The eyes bulge out – dominating the head. The wings have an intricate pattern of supports for the wing membrane and the wings are not exactly flat.

The different kinds of dragonflies have a different pattern of wing structures.

The opening in the mid-back where the wings are attached looks so alien - or not the smoothed structure of other things like fly (butterflies, birds, or airplanes).

Enjoy the slide show below of more dragonflies!