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
Styrax officinalis spring to summer (May–June). "Styrax officinalis" subsp. "redidivus", "Styrax officinalis" subsp. "fulvescens" (both native to California) and "Styrax officinalis" subsp. "jaliscana" (native to Mexico), were included here, but recent molecular analysis has suggested that they may be diverged to the point of being separate species. This species is native to southern Europe and the Middle East. It prefers dry rocky slopes, woods and thickets at an elevation up to above sea level. This plant is the "official" source of styrax, an herbal medicine known from ancient times. Some believe its oleoresin to have been the stacte used together with frankincense,