Pseudogoodyera
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Pseudogoodyera is a genus from the family of the orchid (Orchidaceae). It contains one to three species that are common in Central America and Cuba.
description
The Pseudogoodyera species are small, herbaceous plants. The roots are clustered together, they are fleshy, cylindrical to spindle-shaped and hairy. Two or three stalked leaves are in a basal rosette. The leaf blade is lanceolate to oval in shape, it ends pointed, the leaf color is a dark green with silver veins or spots. The leaves have not yet wilted at the time of flowering.
The racemose inflorescence is dense and many-flowered, the small flowers are indistinctly one-sided. The inflorescence axis is particularly hairy in the upper area. The bracts are dense and surround the peduncle, they are tubular to lanceolate, pointed, their color is reddish. The tiny flowers are reddish green with a white lip . The ovary is spindle-shaped, sessile, somewhat twisted and slightly hairy. The dorsal sepal is free, oval and concave. The lateral sepals with their asymmetrical bases have grown together to form a small bulge. The petals are narrow spatulate, with the inner edge they adhere to the dorsal sepal, the tips are free. The lip is narrow (nailed) at the base and laterally provided with two nectar glands visible as an indistinct thickening, further in front it merges into the heart-shaped to mussel-shaped blade. It is quite fleshy with thinner edges, the sides are turned up and cling to the column . The column is short, curved, hairy on the underside. It protrudes beyond the point of attachment on the ovary and forms a slightly curved column foot that is about as long as the actual column. The scar is kidney-shaped or semicircular and lies transverse to the column axis. The stamen is broadly oval, heart-shaped at the base, blunt to rounded at the front. It contains the club-shaped, yellow pollinia that hang on a small, oval adhesive disc ( Viscidium ). The separating tissue between the stigma and the stamen (rostellum) is rather short and trapezoidal, the viscidium leaves a rounded indentation after removal. The upright capsules are inverted ovoid.
Occurrence
The species of the genus Pseudogoodyera occur in Mexico, Belize, Guatemala and Cuba. They colonize altitudes up to 1000 meters. They occur terrestrially or lithophythically in tropical evergreen or seasonally deciduous forest.
Systematics and botanical history
Pseudogoodyera is classified within the tribe Cranichideae in the subtribe Spiranthinae . The genus was described by Rudolf Schlechter in 1920 . The name refers to the fact that the type species, Pseudogoodyera wrightii , was first classified by Reichenbach in the only distantly related genus Goodyera . Worse gave the genera Brachystele , Mesadenus and Sauroglossum as the closest relatives, but the actual relationships are unclear.
All three species that have been placed in the genus Pseudogoodyera by different authors were initially described as Spiranthes . Schlechter described Pseudogoodyera wrightii in 1920 , the genus was also used by Leslie Garay in his 1982 revision of Spiranthinae. In 1986 Burns Balogh established a further species, Pseudogoodyera gonzalezii , considered by Garay and in 2003 also by Salazar as Physogyne . The third species is the Pseudogoodyera pseudogoodyeroides described by Szlachetko in 1994 , which Govaerts considers to be a synonym for Pseudogoodyera wrightii .
literature
- Leslie A. Garay: A generic revision of the Spiranthinae . In: Botanical Museum Leaflets of Harvard University . tape 28 , no. 4 , 1982, ISSN 0006-8098 .
- Alec M. Pridgeon, Phillip Cribb, Mark W. Chase, Finn Rasmussen (Eds.): Genera Orchidacearum. Orchidoideae (Part 2). Vanilloideae . tape 3 . Oxford University Press, New York / Oxford 2003, ISBN 0-19-850711-9 .
Individual evidence
- ↑ a b Leslie Garay: Pseudogoodyera . In: A generic revision of the Spiranthinae . Cambridge Mass 1982, p. 349.
- ↑ a b c d e Gerardo Salazar: Pseudogoodyera . In: Genera Orchidacearum . New York 2003, pp. 238-240.
- ↑ a b Rafaël Govaerts (Ed.): Pseudogoodyera. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved May 18, 2020.