Arachnis
Arachnis is a genus of orchids in the family Orchidaceae, comprising over 20 species native to parts of Asia and Oceania. These vining, monopodial epiphytic herbs are characterized by their linear leaves and flowers that are noted for resembling spiders and possessing a musky fragrance.
Key Facts
- ›The genus Arachnis is part of the Orchidaceae family.
- ›Species are found across China, India, Southeast Asia, Indonesia, the Philippines, New Guinea, and the Solomon Islands.
- ›Arachnis plants are monopodial, epiphytic herbs with linear leaves that can form dense thickets.
- ›Their flowers are often described as spider-like in appearance.
- ›The flowers are known to be fragrant, with a musky scent.
- ›The genus name Arachnis is derived from the Greek word for spider.
Scorpion Orchid
Epiphytic, Vining
June
Pots, Baskets, Mounted On Slabs
About Arachnis
Overview
The genus Arachnis, abbreviated as Arach in horticultural circles, is a collection of orchids belonging to the family Orchidaceae. It encompasses more than 20 species found naturally across a broad geographical expanse, including China, India, Southeast Asia, Indonesia, the Philippines, New Guinea, and the Solomon Islands. The common name for orchids in this genus is "scorpion orchid."
Vegetative and Generative Characteristics
Plants within the genus Arachnis are characterized as monopodial, epiphytic herbs. They feature distichously arranged, linear leaves, and their vining growth habit can lead them to form dense thickets. Unlike some other orchids, Arachnis does not produce pseudobulbs. The flowers are a distinctive feature, often noted for their resemblance to spiders, which is reflected in the genus's etymology, derived from the Greek word "arachne" meaning spider. These flowers are also known to be fragrant, with their scent described as musky.
Ecology and Habitat
Certain species within the Arachnis genus have specific habitat preferences. For instance, Arachnis senapatiana has been documented growing in subtropical broad-leaved forests at elevations of 1747 meters above sea level. This species is also known to flower in the month of June.
Taxonomy and Conservation
The genus currently includes 16 accepted species, along with one natural hybrid. It is important to note that taxonomic classifications can evolve, and several species formerly placed under Arachnis are now recognized within different genera, such as Dimorphorchis and Trichoglottis. In terms of conservation, the genus has faced challenges, with Arachnis having become extinct in the Nansei-shoto region.
Horticulture
Arachnis orchids can be cultivated successfully under warm and moist conditions. They are typically grown in pots, baskets, or mounted on slabs, demonstrating their adaptability to various horticultural setups.
Source: Wikipedia ↗
Frequently Asked Questions
What are the common names for orchids in the Arachnis genus?
The genus Arachnis is commonly known as the scorpion orchid. In horticultural trade, it is often abbreviated as Arach.
Where are Arachnis orchids naturally found?
Arachnis orchids are native to a wide range of regions including China, India, Southeast Asia, Indonesia, the Philippines, New Guinea, and the Solomon Islands.
What do Arachnis flowers look like?
The flowers of Arachnis are thought to resemble spiders, which is reflected in the genus's name, derived from the Greek word for spider. They are also noted for their fragrance.
What is the growth habit of Arachnis orchids?
Arachnis are monopodial, epiphytic herbs. This means they grow in a single direction, typically on other plants like trees, and do not produce pseudobulbs.
What kind of fragrance do Arachnis flowers have?
The flowers of Arachnis are fragrant, and this scent has been described as musky.
Are there any conservation concerns for Arachnis orchids?
One species, Arachnis has become extinct in Nansei-shoto, indicating potential vulnerability for some members of the genus.
Related Orchid species
Corybas
Corybas, commonly known as helmet orchids, is a genus of about 120 species of small, perennial, terrestrial herbs in the orchid family. Native to a wide range including Australia, New Zealand, Southeast Asia, and the Himalayas, these orchids are distinctive for their single, fungus-like flower, dominated by a large dorsal sepal and labellum, often resembling a helmet.
Dipodium
Dipodium, commonly known as hyacinth orchids, is a genus of approximately forty orchid species native to tropical, subtropical, and temperate regions across Southeast Asia, New Guinea, the Pacific Islands, and Australia. This genus is distinguished by its large, often colorful flowers borne on tall stems, and includes species that are either terrestrial or climbing, some with leaves and some leafless.
Dimorphorchis
Dimorphorchis is a genus of nine orchid species found in Southeast Asia and Oceania, remarkable for producing two distinct flower forms on the same plant. These epiphytic or lithophytic herbs are characterized by long stems and leathery leaves, with their inflorescences bearing dimorphic flowers that differ in size, scent, and petal shape.