blackroot

noun5

1. •
   Several plant diseases caused by fungi in the genus Aphanomyces causing that cause roots to rot and turn black.
2. •
   Several North American plants with black roots of:
3. •
   genus Pterocaulon, such as Pterocaulon pycnostachyum (dense-spike blackroot) and Pterocaulon virgatum (wand blackroot)
4. •
   species Veronicastrum virginicum (Culver's root)
5. •
   species Aletris farinosa (colicroot)