This monothalamous gall is an enlargement of the stem, often just below the flowering branches of blue-curls, Trichostema dichotomum. It is irregularly reniform, tapering somewhat above, ending bluntly below. They average 18 by 6 mm. The surface and coloring are similar to those of the stem. The thick spongy walls enclose a cavity following the general curve of the gall, extending below however, through the wall to a projection at the base of the concave side, where it is separated from the exterior by the epidermis of the stem only, thus providing for the escape of the adult which could not eat its way our, having no mandibles. Abundant.

I found the galls there [Sarasota, Florida] on January 5 at the end of the flowering season.
Here and there was a terminal twig that had been made over into an ocarina-shaped gall of about the size of a peanut. A few of the galls were still green with a wash of reddish color on the side exposed to the sun; their thicker tissues had dried up more slowly than the rest of the panicle. Most of them were brown, some of the older ones were black. Their size made them easy to find among the slender twigs.
The gall is short-spindle-shaped, 15-20 millimeters long, 5 to 8 wide, smoothly contoured and slightly inequilateral. Its walls are woody, thick and very hard...There is a little low protuberance on one side near the base - a predetermined point at which the exit door will be made for the emergence of the adult insect.
The emergence of the adult moths was slow and irregular. From galls collected on January 5, the first moth came out on the last day of the month; and others came out at long intervals for two months thereafter.