Dimorphorchis is a genus of flowering plants from the orchid family, Orchidaceae. It contains 9 species, which are native to Papua New Guinea, the Philippines, Indonesia, Malaysia, Solomon Islands, and Brunei.[1]
| Dimorphorchis | |
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| Dimorphorchis rossii | |
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| Botanical illustration of Dimorphorchis lowii | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Epidendroideae |
| Tribe: | Vandeae |
| Subtribe: | Aeridinae |
| Genus: | Dimorphorchis Rolfe |
| Synonyms[1] | |
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Description
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Species of Dimorphorchis are highly unusual in that the showy inflorescences, which may grow up to 3 metres in length, bear dimorphic (heteranthous) flowers. The 2-3 flowers closest to the base of the inflorescence are strongly fragrant, slightly smaller, and of a different colour compared to the rest of the flowers, which are unscented and have wavy petals. It is unknown how the genus is pollinated.[2]
Unlike Catasetum and species of Oncidium in the section Heterantha, which have sexually dimorphic flowers, the dimorphic flowers of Dimorphorchis are all hermaphoditic, which is also seen to a less striking extent in Grammatophyllum.[2]
Dimorphorchis are large monopodial vandaceous orchids. They may grow up to 2 metres in height, with leaves measuring up to 70 cm. The showy inflorescences may grow up to 3 metres in length.[2]
Taxonomy
editSpecies
editIt has nine species:[1]
- Dimorphorchis beccarii (Rchb.f.) Kocyan & Schuit.
- Dimorphorchis breviscapa (J.J.Sm.) Kocyan & Schuit.
- Dimorphorchis celebica (Schltr.) Ormerod
- Dimorphorchis graciliscapa (A.Lamb & Shim) P.J.Cribb
- Dimorphorchis lowii (Lindl.) Rolfe
- Dimorphorchis lyonii (Ames) Ormerod
- Dimorphorchis rohaniana (Rchb.f.) P.J.Cribb
- Dimorphorchis rossii Fowlie
- Dimorphorchis tenomensis (A.Lamb) P.J.Cribb
References
edit- ^ a b c "Dimorphorchis Rolfe". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 8 February 2023.
- ^ a b c Wood, Jeffrey (2005). "518. DIMORPHORCHIS ROSSII VAR. GRACILISCAPA: Orchidaceae". Curtis's Botanical Magazine. 22 (1): 42–46. ISSN 1355-4905.
External links
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Data related to Dimorphorchis at Wikispecies
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