Identificaciones de ghostweel

On Polygonum sp., I believe Polygonum buxiforme. I say "believe" because I've previously observed both P. aviculare and P. buxiforme in my yard and I've not yet bothered to key out any of the Polygonum spp. this growing season.

This is part of a series of observations from the same area:

• June 7: https://www.inaturalist.org/observations/221376768
• June 9: (this observation)
• June 13: https://www.inaturalist.org/observations/223607975

There are several other knotweed plants in other places in my yard that appear to be effected by this same pathogen too. The Fallopia sp. in my yard also appears to be effected by some sort of pathogen. See https://www.inaturalist.org/observations/223604355. The Persicaria sp. in my yard does not appear to be effected by any pathogens.