blackroot

English

Etymology

From black +‎ root.

Noun

blackroot (countable and uncountable, plural blackroots)

1. Several North American plants with black roots of:
   1. genus Pterocaulon, such as Pterocaulon pycnostachyum (dense-spike blackroot) and Pterocaulon virgatum (wand blackroot)
   2. species Veronicastrum virginicum (Culver's root)
   3. species Aletris farinosa (colicroot)
2. Several plant diseases caused by fungi in the genus Aphanomyces causing that cause roots to rot and turn black.