Epipogium
Epipogium
Epipogium is a genus of four species of terrestrial, leafless orchids belonging to the Orchidaceae family. These orchids are characterized by a fleshy, underground rhizome and a hollow, pale flowering stem bearing small, delicate flowers. They are native to a wide geographic range spanning tropical Africa, Europe, temperate and tropical Asia, Australia, and some Pacific Islands.
Key Facts
- ›Epipogium orchids are leafless and grow terrestrially.
- ›They possess a fleshy, underground rhizome.
- ›Flowering stems are hollow, pale, and bear drooping flowers.
- ›Flowers are typically yellowish-white with violet or reddish-brown markings.
- ›The genus is distributed across Africa, Europe, Asia, Australia, and Pacific Islands.
- ›They are often found in rainforest habitats, particularly near rotting wood.
Ghost Orchids, 虎舌蘭, 上鬚蘭
Terrestrial, Mycotrophic
Yellowish White, Violet Markings, Reddish Brown Markings
About Epipogium
The genus Epipogium comprises leafless terrestrial orchids known commonly as ghost orchids. These plants belong to the Orchidaceae family and are characterized by their unique morphology, including a fleshy underground rhizome and a hollow, pale flowering stem that emerges above ground. The flowers, which are short-lived, are typically yellowish-white with distinctive violet or reddish-brown markings, featuring narrow sepals and petals, and a broad, spurred labellum.
Distribution and Habitat
Epipogium orchids are found across a wide geographical range, extending from tropical Africa to Europe, and across temperate and tropical Asia, Australia, and some Pacific Islands. They inhabit a variety of environments, but are most frequently encountered in rainforests, particularly in areas where rotting wood is present. This suggests a mycotrophic lifestyle, where the plants derive nutrients from fungi.
Taxonomy and Naming
The genus Epipogium was first formally described in 1792 by Moritz Balthasar Borkhausen, based on an unpublished description by Johann Georg Gmelin. The name itself is derived from Ancient Greek roots: 'epi' meaning 'upon' or 'on,' and 'pōgōn' meaning 'beard,' a reference likely made to the orchid's labellum. Several species are recognized within the genus, including Epipogium aphyllum, Epipogium japonicum, Epipogium kentingense, Epipogium lalashanense, Epipogium meridianum, Epipogium roseum, Epipogium sessanum, and Epipogium taiwanense.
Source: Wikipedia ↗
Frequently Asked Questions
What are ghost orchids?
Ghost orchids refer to orchids in the genus Epipogium. These are terrestrial, leafless orchids known for their pale, delicate flowers that can appear ethereal, resembling ghosts.
What are the defining characteristics of Epipogium orchids?
Epipogium orchids are leafless terrestrial herbs with a fleshy underground rhizome. Their flowering stems are hollow and pale, bearing small, drooping flowers that are short-lived. The flowers are typically yellowish-white with distinct violet or reddish-brown markings.
Where are Epipogium orchids found naturally?
This genus of orchids has a broad natural distribution. They are found in regions extending from tropical Africa across Europe, temperate and tropical Asia, Australia, and on some Pacific Islands.
What kind of habitat do Epipogium orchids prefer?
Epipogium orchids grow in various habitats but are commonly found in rainforest environments. They often thrive in areas with decaying wood, indicating a reliance on mycotrophic nutrition.
What does the name Epipogium mean?
The name Epipogium is derived from Ancient Greek. 'Epi' means 'upon' or 'on,' and 'pōgōn' means 'beard,' which likely refers to the appearance of the orchid's labellum.
Related Orchid species
Hetaeria
Hetaeria, commonly known as hairy jewel orchids, is a genus of approximately thirty terrestrial orchid species found in tropical Africa and Asia, extending to New Guinea, Australia, and Pacific Islands. These plants are characterized by their succulent rhizomes, loose rosettes of leaves, and small, pale, hairy flowers borne on thin, hairy stems. A distinctive feature is their non-resupinate flowers, where the dorsal sepal and petals form a hood over the column, and the labellum possesses a deep pouch.
Cypripedioideae
Cypripedioideae, commonly known as lady's slipper orchids, are a subfamily of perennial herbaceous plants characterized by their distinctive slipper-shaped flower pouches. These orchids are found across various regions of the Americas, Europe, Asia, and Africa, and are notable for their unique pollination mechanism that traps insects within the modified labellum.
Didymoplexis
Didymoplexis, commonly known as crystal orchids, is a genus of about twenty described species of leafless, terrestrial orchids. These orchids are characterized by their swollen, fleshy rhizomes and delicate, upright flowering stems bearing resupinate, bell-shaped flowers that are typically white or pale yellowish-brown and short-lived. They are found across a wide geographic range, including Africa, Madagascar, Southeast Asia, Australia, and various Pacific islands.