Growing in a table drain which was graded about two years ago. Could be that the grader is helping to spread it along the side of the road. Most of the plants came up two years ago and this year is its second flowering season.
Mountain Hickory Wattle Leaf Gall
Several leaves of this young acacia shrub had circular to oval patches of thickened, firm, raised growths with brown encrustation on their pale convex surfaces (pics 1 to 3). The growths were concave on the underside with a outer circle of similar brown crust (pic 4). These patches did not occur in any particular part of the leaf - some involved the mid vein and others anywhere on the leaf lamina. A dissection of one of these structures revealed just thick tough plant tissue.
Spotted on young Mountain Hickory Wattle ( Acacia obliquinervia) shrubs on Mt Donna Buang (1250 masl)
Architect of gall unknown.
This small wasp ( a case-moth larvae parasite wasp) was about 10 mm long and very active. The narrow abdomen had thin white bands and a moderate size ovipositor. Head, antennae and thorax were black. The hind legs had black and white markings while the other legs were a pale yellow.
Spotted actively searching low plants (in this case the bumblebee weed) in a riparian area.