Goodyera is a genus of approximately 100 species of terrestrial orchids in the family Orchidaceae (order Asparagales), placed in the tribe Cranichideae. The genus is widely distributed, with its greatest diversity in East Asia and representatives across Europe, Madeira, North and Central America, Australia, and on islands from the west Indian Ocean to the Pacific Ocean.
Plants in the genus are characterised by a fleshy, creeping rhizome and a basal rosette of elliptic, asymmetrical leaves that are distinctively patterned with white or pale green veining or marbling — a feature responsible for the common name rattlesnake plantain. The genus is also known as jade orchids and, in some regions, ladies' tresses. Stems are erect and bear many small, white, resupinate flowers; the entire plant except the flowers is covered with slightly sticky hairs. The dorsal sepal and petals converge to form a hood over the column, while the lateral sepals spread widely. The labellum is entire (unlobed) and bears a small pouch at its base.
Goodyera is superficially similar to the genus Spiranthes, but the two can be distinguished by leaf ornamentation (plain green in Spiranthes versus patterned in Goodyera), the presence of rhizomes (absent in Spiranthes), and the pouched labellum characteristic of Goodyera.
The genus was first formally described in 1813 by the Scottish botanist Robert Brown, with the description published in William Aiton's Hortus Kewensis. Generic delimitation of Goodyera has remained a subject of taxonomic debate, with some authors arguing for a narrower circumscription of the genus.
Etymology
The genus name Goodyera was established by the Scottish botanist Robert Brown in 1813, with the description published in William Aiton's Hortus Kewensis. The name honours the English botanist John Goodyer (1592–1664). The genus is abbreviated G. in horticultural nomenclature.
Distribution
Goodyera has its center of diversity in East Asia and is distributed across Europe (including Madeira), North and Central America, Australia, and on islands throughout the Indian Ocean and Pacific Ocean. The wide distribution makes it one of the more geographically widespread orchid genera.
Ecology
Goodyera species are mainly terrestrial, growing in woodland and forest understory habitats where they colonise the ground via their fleshy, creeping rhizomes. Their patterned leaves and small white flowers are adapted to low-light forest floors, and the slightly sticky hairs on the vegetative parts may deter small invertebrates.
Taxonomy Notes
The generic delimitation of Goodyera remains problematic; some authors have presented evidence supporting a narrower circumscription of the genus. It is placed in the tribe Cranichideae within Orchidaceae (order Asparagales). GBIF recognises approximately 68 species in the genus backbone, while Plants of the World Online recognised around 100 as of May 2023.
