knotgrass

When the Prince’s Foundation took over the walled garden, it was a sea of knotgrass.

“There’s something else,” said Harry, watching Hermione tearing bundles of knotgrass and throwing them into the potion.

������, again, of weed seeds in general, and knotgrass in particular?

I will not say but that he may pass for an historian in Garbier's academy; he is much of the size of those knotgrass professors.

“Lacewing flies, leeches, fluxweed, and knotgrass,” she murmured, running her finger down the list of ingredients.