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Gypsywort (aka, European bugleweed) is another species native to Europe and Asia. How it came to the New World is unknown, but it has a long history in the botanical literature in Europe (back to the sixteenth century). It strongly prefers wetlands and can often be found in muds. The stem can be as much as 2.5' tall, usually unbranched, light- or yellowish-green, square in section, hairy, and finely grooved. Flowers occur in whorls in the axils of the upper leaves. Each flower is 1/8" across consisting of a green calyx with 4-5 teeth, each longer than the calyx tube, giving the mass of flowers a bristly appearance; a white tubular corolla with four apical lobes, usually with a few pink or purple spots on the lower lip; two stamens; and a style with a bifurcated tip (which can be difficult to see). The fruits are four, concave-topped nutlets cupped in the calyx. This species is known to hybridize with American bugleweed (Lycopus americanus). The medicinal properties of gypsywort are quite controversial; resist the urge to nibble.

Lycopus

Lycopus europaeus

gypsywort [Blooms: Aug-Sep]