Chokeberry is a widespread wetland shrub. Above left, the arrow points to the hypanthial ovary that develops into the dark, purple-black fruit at left.
Photos: (above) M. Ferguson; (left) R. Presgrave; all three © 1998 Royal Ontario Museum; (right) © 2000 T. A. Dickinson.
Hall, I. V., Wood, G. W. & L. P. Jackson, 1978. The Biology of Canadian Weeds 30. Pyrus melanocarpa (Michx.) Willd. Can. J. Plant Sci. 58: 499-504.
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