Epilobium hirsutum × lamyi, a hybrid herb, is the result of a cross between Epilobium hirsutum, commonly known as the Great Willowherb, and another Epilobium species. This perennial plant is not widely recognized in horticulture but shares characteristics with its parent species. Epilobium hirsutum is native to a variety of habitats including moist meadows, stream banks, and waste areas throughout Europe, North Africa, and parts of Asia. The hybrid likely shares this adaptability to moist, fertile environments.

Epilobium hirsutum × lamyi likely exhibits a vigorous growth habit with tall, erect stems and lance-shaped leaves. The flowers are expected to be pink to purple, similar to those of Great Willowherb, blooming in summer and attracting pollinators. While specific information on this hybrid’s benefits and uses is limited, it may share the parent species’ ability to colonize disturbed areas quickly, making it potentially useful for soil stabilization or habitat restoration projects. Cultivation requirements would include moist soil conditions and full sun to part shade. As with many hybrids, variability in appearance and vigor can be expected, and specific garden cultivars are not well-documented. Potential problems could mirror those of the parent species, such as susceptibility to rust and mildew.CC BY-SA 4.0