Arachnis

Arachnis is a genus of orchids belonging to the subfamily Epidendroideae. These orchids are native to Southeast Asia, including countries like Thailand, Malaysia, and the Philippines. Arachnis orchids are epiphytic, meaning they grow on other plants, typically trees, without being parasitic. They are characterized by their long, arching stems that can grow to several meters in length, from which hang pendulous racemes of flowers.

The flowers of Arachnis orchids are often quite striking, with a waxy texture and a long-lasting bloom. They typically feature prominent sepals and petals, often with a contrasting labellum. The coloration can vary widely depending on the species, ranging from white and yellow to green and brown, often with intricate spotting or veining. Some species are fragrant.

Commonly known as "scorpion orchids" due to the shape of their inflorescences which can resemble a scorpion's tail, these orchids are popular in horticulture. Their robust nature and showy flowers make them attractive additions to collections. Propagation is usually done through division of established plants or by stem cuttings. Arachnis orchids generally require bright, indirect light, good air circulation, and consistent watering, allowing the potting medium to dry slightly between waterings. They are sensitive to overwatering and root rot.