The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
possum haw
NOUN:
1. A deciduous holly (Ilex decidua) of the southeast United States, having bright red fruit and dull green toothed leaves. 2. A deciduous shrub (Viburnum nudum) of the eastern United States, having white or yellowish flowers and bluish-black fruit. 3. See dockmackie.