anacharis is in Canada, and should, by rights, be in Vermont.
Water-thyme (anacharis canadensus) grows in slow-flowing streams.
anacharis should not be introduced into any water, either pond or stream, unless it can be kept down easily.
The best for this purpose are valesneria spiralis, anacharis, and chara vulgaris.
Among the several varieties of the weeds, I noticed a great quantity of "anacharis."