Tridactyle pentalobata P.J.Cribb & Stévart

This species is accepted, and its native range is Gabon (Monts de Cristal).

[KBu]

Stévart, T., & Cribb, P. (2004). Five New Taxa of Tridactyle (Orchidaceae) from West Central Africa. Kew Bulletin, 59(2), 195-205. doi:10.2307/4115850

Conservation
Known only from the type locality, which is now included in the Crystal Mountains National Park. It is probably not endangered.
Distribution
Endemic to Monts de Cristal (Gabon).
Ecology
Primary forest; 465 m. Epiphyte at 25 m in the middle part of the canopy.
Morphology General Habit
Epiphytic herb; stem more than 30 cm long, 6 - 7 mm in diameter, pendulous
Morphology Leaves
Leaves more than 6, imbricate, narrowly ovate-elliptic, twisted at base to lie in one plane, thin-textured, lower face keeled, 11.3 - 13.5 x 1.9 - 2.3 cm, unequally roundly bilobed, lobes 0 - 5 mm, articulate at the base to a sheathing leaf base
Morphology Reproductive morphology Flowers
Flowers distichous, green to yellow; pedicel and ovary 4 x 2 mm; bracts amplexicaul, enclosing the rachis and the pedicel, 2.5 x 2 mm
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal convex, oblong, apiculate, 4 x 2.2 mm, thickened, trinerved Lateral sepals oblong, acute, 5.8 x 2.1 mm, trinerved, thickened on outer face, slightly united at the base
Morphology Reproductive morphology Flowers Column
Column 1 mm long.
Morphology Reproductive morphology Flowers Corolla
Petals 4 x 1.8 mm, narrowly oblong, acute, trinerved, margins erose, thickened on outer face Lip oblong, trilobed in the upper part, 4 x 3.2 mm, with two distinct triangular auricles at mouth of the spur, 0.8 mm long; side lobes transversally oblong, very short, 0.5 x 1 mm; midlobe triangular, acute, I x 1 mm long, thickened downward; spur straight, distinctly inflated toward the apex, apex obtuse, 9 x 0.8 - 1 mm
Morphology Reproductive morphology Inflorescences
Inflorescence 3.4 - 5.3 cm, borne opposite the leaves, up to 11-flowered; rachis quadrangular to semi-terete, slightly papillose
Note
Tridactyle pentalobala is a distinctive species with a lip rather similar to that of T. tridentata, but it differs from that species in having dorsiventrally flattened leaves, longer inflorescences and a spur that is markedly inflated. It can be compared with T. gelllilii (De Wild.) Schltr., but that has long lacerate side lobes to the lip and with T. truncatiloba Summerh. which possesses much larger flowers (Summerhayes 1948). This species is named after the shape of the lip, which appears five-lobed with the two distinct basal auricles and a trilobed apex.
Phenology
Flowering in April.
Type
Gabon, Mont Mbilan, Stivart 1394 (holotypus BR).

[KBu]
Use
No data are available for this species.

Native to:

Gabon

Tridactyle pentalobata P.J.Cribb & Stévart appears in other Kew resources:

First published in Kew Bull. 59: 202 (2004)

Accepted by

  • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.
  • Szlachetko, D.L. & Mytnik-Ejsmont, J. (2021). Orchidaceae of West-Central Africa 3: 1-555. Koeltz Scientific books, Koenigsheim, Germany.

Literature

Kew Bulletin

  • --- (1918). XXX. Tridactyle. Beih. Bot. Centralbl. 36: 142-149.
  • Cribb, P. J. & Stewart, J. (1985). Additions to the orchid flora of tropical Africa. Kew Bull. 40: 399 - 419.
  • Lebrun, J.-P. & Stork, A. L. (1995). Enumération des plantes à fleurs d'Afrique tropicale. Vol. III. Monocotylédones: Limnocharitaceae à Poaceae. Conservatoire et Jardin Botaniques de la Ville de Genève.
  • Schlechter, R. (1914). Die Orchideen. Paul Parey, Berlin.
  • Skov, F. (2000). Potential plant distribution mapping based on climatic similarity. Taxon 49: 503 - 515.
  • Summerhayes, V.S. (1948). African orchids 18. Kew Bull. 3: 277 - 302.

Kew Backbone Distributions

  • Szlachetko, D.L. & Mytnik-Ejsmont, J. (2021). Orchidaceae of West-Central Africa 3: 1-555. Koeltz Scientific books, Koenigsheim, Germany.

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

  • Kew Bulletin

    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0