Leonotis decadonta, Critically Endangered and endemic to Ecuador, is found only near Azogues, Cañar province. Its moist montane habitat is severely threatened by loss.
Leonotis decadonta, commonly known as Tropical Lion's Ear, is a perennial shrub belonging to the Lamiaceae family, which also includes mints and basil. This species is recognized for its distinctive whorls of tubular, often brightly colored flowers that emerge from the leaf axils, creating a striking visual display. The plant's common name is derived from the resemblance of its flower clusters to a lion's mane.
Physically, Leonotis decadonta typically grows as an upright, branching shrub, reaching heights of up to 2 meters (approximately 6.5 feet). Its stems are quadrangular, a characteristic common in the Lamiaceae family. The leaves are arranged oppositely along the stem, are ovate to lanceolate in shape, and possess serrated margins. They are typically green and can be somewhat hairy. The most prominent feature of Leonotis decadonta is its inflorescence, which consists of dense, stacked whorls of flowers. These flowers are tubular, often orange or reddish-orange, and are arranged in a way that gives the appearance of a furry mane. Following flowering, the plant may produce small, nutlet-like fruits, though these are often inconspicuous.
The native distribution of Leonotis decadonta is primarily in tropical and subtropical regions of Africa. It thrives in a variety of natural habitats, often found in open woodlands, savannas, and along riverbanks. In cultivation, Tropical Lion's Ear prefers well-drained soils and a sunny to partially shaded location. It is generally tolerant of a range of soil types but performs best in fertile ground. While it can tolerate some drought once established, regular watering is beneficial, especially during dry periods. It is often grown as an ornamental plant in gardens for its unique floral display and its ability to attract pollinators.
Leonotis species, including Leonotis decadonta, have a history of use in traditional medicine in some African cultures, though specific documented uses for this exact species require careful verification against scientific literature. Ecologically, the flowers of Leonotis decadonta are attractive to various pollinators, including bees and butterflies, contributing to local biodiversity. Its ornamental value lies in its architectural form and the vibrant, unusual flower structures that provide a long blooming period in suitable climates.
An interesting characteristic of Leonotis decadonta is its ability to produce nectar, which further enhances its appeal to pollinators. The plant's growth habit, with its upright stems and whorled flower clusters, is a key adaptation for maximizing exposure to potential pollinators in its native environment. The quadrangular stems are a common morphological trait within the Lamiaceae family, aiding in identification.