Cutleaf Groundcherry (Physalis angulata, 苦蘵).
I went exploring a part of the wild mudflats in the Xiang which had been inaccessible for many months: the river water is reaching its winter low. There were many flocks of starlings and myna, and a few other birds. Amongst the marshy vegetation I found only a single groundcherry still in bloom, and displaying dozens of its lantern-like sepals.