#tropical botany
- Aerva — A genus of herbaceous or subshrubby plants belonging to the Amaranthaceae family, native to the tropical and subtropical regions of Africa and Asia. These species are structurally characterized by alternate leaves and dense, tomentose or woolly inflorescences, often utilized in traditional Ayurvedic medicine due to their diuretic and anti-inflammatory properties.
- Aeschynanthus — A genus of perennial tropical herbaceous or subshrubby epiphytic or lithophytic plants belonging to the Gesneriaceae family, native to the humid forests of Southeast Asia. These plants are structurally characterized by pendulous stems, fleshy opposite leaves, and tubular flowers, often intense red, protected at the base by a dark tubular calyx resembling a lipstick tube, which is why they are popularly cultivated as hanging decorative plants.
- Aeschynanthus pulcher — Scientific name of a perennial epiphytic lipstick plant species from the Aeschynanthus genus, native to Malaysia and Java, structurally characterized by ovate, smooth, bright green leaves with slightly purple margins and scarlet-red tubular flowers with a yellow throat, emerging from a short, greenish or purple, often glabrous calyx. The species is highly valued in interior landscape design for the elegance and vibrant coloring of its flowers.
- Ageratum conyzoides — A species of annual herbaceous plant in the genus Ageratum, native to tropical America, widely distributed as an invasive weed in warm regions of the world and recognized for its medicinal properties. Its leaves emit a strong, goat-like odor, and it is traditionally used for its anti-inflammatory, analgesic, and wound-healing effects, although it contains pyrrolizidine alkaloids toxic to the liver.
- Anoectochilus — A genus of terrestrial plants in the Orchidaceae (orchid) family, popularly known as 'jewel orchids' due to their spectacular velvety foliage veined with brilliant gold or silver lines. These small structural plants grow wild in the shade of tropical rainforests across Southeast Asia and the Pacific islands, highly collected and globally valued for their leaf aesthetics, unlike most orchids cultivated for their blooms.
- Anoectochilus regalis — An endemic species of terrestrial orchid from Sri Lanka, belonging to the genus Anoectochilus, world-renowned for its velvety, dark green to blackish foliage traversed by a complex structural network of brilliant golden veins. This rare plant, nicknamed the 'king jewel orchid', grows in the shaded and humid lower strata of montane tropical rainforests, being a strictly protected species highly prized by exotic plant collectors.
- Anoectochilus reinwardtii — A species of terrestrial orchid native to a wide range in Southeast Asia (including Indonesia, Malaysia, and Thailand), belonging to the 'jewel orchid' group. The plant is structurally distinguished by its ovate, dark purple or coppery-brown leaves decorated with a network of fine pink-gold or bronze veins, and by its erect floral spikes bearing small, white flowers with a well-developed labellum.
- Anoectochilus roxburghii — A remarkable species of terrestrial orchid widespread across South Asia, the Himalayas, and China, belonging to the 'jewel orchid' group. This small structural plant is highly famous due to its velvety leaves of an intense dark purple to black color, spectacularly decorated with a dense network of brilliant pink-gold or reddish veins, also used traditionally in Chinese medicine due to its bioactive properties.
- Anoectochilus setaceus — The type species of the genus Anoectochilus, a rare terrestrial orchid native to the montane tropical rainforests of Java, Sumatra, and other Indonesian islands. The plant is structurally characterized by velvety dark olive-green or reddish-brown leaves decorated with finely branched gold or copper veins, and by a spectacular white floral labellum provided with long lateral fringes resembling stiff hairs (setaceous).