Althaea (plant) Althaea (plant) Althaea is a genus of 6–12 species of perennial herbs native to Europe, North Africa and western Asia. It includes "Althaea officinalis", also known as the marshmallow plant, whence the fluffy confection got its name. They are found on the banks of rivers and in salt marshes, preferring moist, sandy soils. The stems grow to 1–2 m tall, and flower in mid summer. The leaves are palmately lobed with 3–7 lobes. "Althaea" species are used as food plants by the larvae of some Lepidoptera species including "Bucculatrix quadrigemina". The genus formerly included a number of additional species now
Verbena officinalis "V. officinalis" as a subspecies or variety. But despite the outward similarity, biogeography alone strongly suggests there is really no justification to include this North American native here, and DNA sequence data agrees. Instead, "V. halei" seems to be closely related to "V. macdougalii", perhaps with some interbreeding with the "V. menthifolia" lineage which might explain its Common Vervain-like traits. Common vervain has been held in high esteem since classical antiquity; it has long been associated with divine and other supernatural forces, and it has an equally long-standing use as a medicinal plant. Herbal capsules are used as a soporific