Oeceoclades, collectively known as the monk orchids, is a genus of flowering plants from the orchid family, Orchidaceae. It is related to Eulophia and like that genus is mostly terrestrial in habit. A few species extend into very arid environments, unusual for an orchid.
Oeceoclades calcarata is a terrestrial orchid species in the genus Oeceoclades that is endemic to Madagascar. It was first described by the British botanist Robert Allen Rolfe in 1905 as Eulophia paniculata. The German botanist Rudolf Schlechter later described this species as Cymbidium calcaratum in 1915 and then transferred his own taxon to the genus Eulophia in 1925. When Leslie Andrew Garay and Peter Taylor revised the genus Oeceoclades in 1976, they transferred this species to the expanded Oeceoclades as O. calcarata because even though Eulophia paniculata was the older name and thus had priority, there had already been an earlier species named Oeceoclades paniculata that prevented using that specific epithet.
Oeceoclades alismatophylla is a species of orchid in the genus Oeceoclades that is native to Comoros and northeastern Madagascar. It was first described by the German botanist Heinrich Gustav Reichenbach in 1885 as Eulophia alismatophylla and later transferred to the genus Eulophidium in 1957 by V.S. Summerhayes. When Leslie Andrew Garay and Peter Taylor revised the genus Oeceoclades in 1976, they transferred this species to the expanded Oeceoclades as O. alismatophylla. Garay and Taylor noted that this species is broadly similar in vegetative morphology to O. analamerensis, O. lonchophylla, and O. petiolata but could be distinguished from them in floral morphology, with O. alismatophylla having lateral labellum lobes that are larger than the middle one.
Oeceoclades ambongensis is a terrestrial orchid species in the genus Oeceoclades that is endemic to Madagascar. It was first described by the German botanist Rudolf Schlechter in 1913 as Eulophidium ambongense. When Leslie Andrew Garay and Peter Taylor revised the genus Oeceoclades in 1976, they transferred this species to the expanded Oeceoclades as O. ambongensis. Garay and Taylor noted that this species could be distinguished from closely allied species, such as O. maculata by its larger flowers with subglobose spur and a bilobed callus on the labellum.
Oeceoclades analamerensis is a terrestrial orchid species in the genus Oeceoclades that is endemic to northern Madagascar. It was first described by the French botanist Joseph Marie Henry Alfred Perrier de la Bâthie in 1939 as Lissochilus analamerensis. The English botanist V.S. Summerhayes later transferred this species to the genus Eulophidium in 1957. When Leslie Andrew Garay and Peter Taylor revised the genus Oeceoclades in 1976, they transferred this species to the expanded Oeceoclades.
Oeceoclades analavelensis is a terrestrial orchid species in the genus Oeceoclades that is endemic to southwestern Madagascar. It was first described by the French botanist Joseph Marie Henry Alfred Perrier de la Bâthie in 1939 as Lissochilus analavelensis. The English botanist V.S. Summerhayes later transferred this species to the genus Eulophidium in 1957. When Leslie Andrew Garay and Peter Taylor revised the genus Oeceoclades in 1976, they transferred this species to the expanded Oeceoclades.
Oeceoclades angustifolia is a terrestrial orchid species in the genus Oeceoclades that is endemic to southwestern and northern Madagascar. It was first described by the German botanist Karlheinz Senghas in 1966 as Eulophidium angustifolium. When Leslie Andrew Garay and Peter Taylor revised the genus Oeceoclades in 1976, they transferred this species to the expanded Oeceoclades. The type specimen was collected by Werner Rauh near the town of Sakaraha and the Fiherenana River.
Oeceoclades boinensis is a terrestrial orchid species in the genus Oeceoclades that is endemic to northern and western Madagascar. It was first described by the German botanist Rudolf Schlechter in 1913 as Eulophidium boinense. It was first transferred to the genus Lissochilus by Joseph Marie Henry Alfred Perrier de la Bâthie in 1941 and later to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor suggested that this species is closely related to O. rauhii, the two species being allied by the cordate (heart-shaped) base of the leaves but differing in floral structures.
Oeceoclades cordylinophylla is a terrestrial orchid species in the genus Oeceoclades that is native to Comoros and northern Madagascar. It was first described by the German botanist Heinrich Gustav Reichenbach in 1885 as Eulophia cordylinophylla. It was first transferred to the genus Lissochilus by Joseph Marie Henry Alfred Perrier de la Bâthie in 1941, then to the genus Eulophidium by V.S. Summerhayes in 1957, and later to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. The type specimen was collected from the Comoro Islands by Léon Humblot, but the actual specimen is missing. Garay and Taylor indicated that an herbarium sheet of Humblot's with an unpublished name by Reichenbach appears to align well with the original description. The margins of the column wings of O. cordylinophylla are ciliolate-hirsute, fringed with stiff, minute hairs.
Oeceoclades latifolia is a terrestrial orchid species in the genus Oeceoclades that is endemic to São Tomé Island. It was first described by the British botanist Robert Allen Rolfe in 1891 as Eulophia latifolia, then moved to the genus Eulophidium by V.S. Summerhayes in 1957 and again moved to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor noted that O. latifolia is similar in vegetative morphology to O. atrovirens but the floral structure is more similar to O. ugandae. The lateral veins on the labellum are fringed with small hairs, a characteristic that is shared with O. pandurata, O. seychellarum, and O. lanceata.
Oeceoclades lonchophylla is a terrestrial orchid species in the genus Oeceoclades that is native to Tanzania, Mozambique, KwaZulu-Natal in South Africa, and Comoros. It was first described by the German botanist Heinrich Gustav Reichenbach in 1885 as Eulophia lonchophylla, then moved to the genus Eulophidium by Rudolf Schlechter in 1925 and to the genus Lissochilus by Joseph Marie Henry Alfred Perrier de la Bâthie in 1941. It was last transferred to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor also reduced the species Eulophia tainioides to a synonym of O. lonchophylla for lack of distinguishing characteristics that could separate the two species.
Oeceoclades lubbersiana is a terrestrial orchid species in the genus Oeceoclades that is native to the Democratic Republic of the Congo and Uganda. It was first described by the Belgian botanists Émile Auguste Joseph De Wildeman and Émile Laurent in 1899 as Eulophia lubbersiana, then moved to the genus Eulophidium by V.S. Summerhayes in 1957 and again transferred to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor noted that this species is similar to O. atrovirens in vegetative morphology, but is better allied to O. latifolia and O. pandurata because all three possess a labellum that is wider than it is long. Oeceoclades lubbersiana was named in honor of Louis Lubbers, who was a botanist working at the Botanical Garden of Brussels.
Oeceoclades seychellarum is a terrestrial orchid species in the genus Oeceoclades that was endemic to the island of Mahé in the Seychelles but is now considered to be extinct. Its sepals and petals are yellowish-white, while the labellum is white with some streaks. This species is only represented by the type specimen, collected in May 1902 from the Cascade Estate on the island of Mahé at an elevation of 900 feet (270 m) in what was then a mountain forest. The location from which the type specimen was collected is now degraded by human activity and invasive plants. Oeceoclades seychellarum was listed as being cultivated at the Royal Botanic Gardens, Kew in 1905, but not after that date.
Oeceoclades pandurata is a terrestrial and epiphytic orchid species in the genus Oeceoclades that is native to eastern Zimbabwe and Madagascar. It was first described by the British botanist Robert Allen Rolfe in 1891 as Eulophia pandurata, then moved to the genus Lissochilus by Joseph Marie Henry Alfred Perrier de la Bâthie in 1941, and again moved to the genus Eulophidium by V.S. Summerhayes in 1957. It was finally transferred to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor noted that this species possesses lateral veins on the labellum that fringed with small hairs. Oeceoclades pandurata is distinguishable from other species in the genus by the lateral lobes of the labellum, which are free and truncate. The type specimen was collected on trees near Fort Dauphin on Madagascar, now known as the city of Tôlanaro. The specific epithet pandurata refers to the fiddle-shaped labellum.
Oeceoclades perrieri is a terrestrial orchid species in the genus Oeceoclades that is native to Mozambique and northwestern Madagascar. It was first described by the German botanist Rudolf Schlechter in 1913 as Eulophia ambongensis. Schlechter had also described a separate species, Eulophidium ambongense in the same 1913 work. When Leslie Andrew Garay and Peter Taylor resurrected and revised the genus Oeceoclades in 1976, these two taxa caused a naming conflict, so they chose to use Eulophidium ambongense as the basionym for O. ambongensis and reduced Eulophia ambongensis to a synonym of O. perrieri, which was based on the basionym Eulophidium perrieri that Schlechter had also described later in 1925. Both Eulophidium perrieri and Eulophia ambongensis were conspecific, belonging to the same species, so Garay and Taylor were free to use the later name as the base for their new combination when transferring taxa to Oeceoclades. Garay and Taylor noted that this species is related to O. quadriloba, O. sclerophylla, and O. analavelensis but can be distinguished from them by its characteristic long strap-like leaves that taper to a point.
Oeceoclades petiolata is a terrestrial orchid species in the genus Oeceoclades that is endemic to northern and western Madagascar. It was first described by the German botanist Rudolf Schlechter in 1913 as Eulophia petiolata. Schlechter later moved this species to the genus Eulophidium in 1925. It was again moved to the genus Lissochilus by the French botanist Joseph Marie Henry Alfred Perrier de la Bâthie in 1941 and last transferred the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor noted that this species is almost identical to O. alismatophylla in vegetative morphology, but the two differ in the shape of the labellum on the flower. The labellum is fiddle-shaped and has three thickened veins in front of the calli.
Oeceoclades quadriloba is a terrestrial orchid species in the genus Oeceoclades that is native to Eswatini, southern Zimbabwe, and western Madagascar. It was first described by the German botanist Rudolf Schlechter in 1913 as Eulophia quadriloba. Schlechter later moved this species to the genus Eulophidium in 1925. It was again moved to the genus Lissochilus by the French botanist Joseph Marie Henry Alfred Perrier de la Bâthie in 1941 and last transferred the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor. Garay and Taylor noted that structure of the labellum is unique in the genus and resembles that of an Asian genus of orchids, Grosourdya. The spur is longer than the midlobe of the labellum.
Oeceoclades spathulifera is a terrestrial orchid species in the genus Oeceoclades that is endemic to northern and western Madagascar. It was first described by the French botanist Joseph Marie Henry Alfred Perrier de la Bâthie in 1935 as Eulophia spathulifera. Perrier later transferred the species to the genus Lissochilus in 1941 and it was again moved to the genus Eulophidium by V.S. Summerhayes in 1957. It was last transferred to the genus Oeceoclades in 1976 by Leslie Andrew Garay and Peter Taylor when they resurrected and revised that genus. Oeceoclades spathulifera is related to O. calcarata and O. hebdingiana but it can be distinguished from those species by its long, spathulate (spoon-shaped) sepals and petals and the globose spur.
Oeceoclades ugandae is a terrestrial orchid species in the genus Oeceoclades that is native to parts of tropical Africa, including west tropical Africa, west-central tropical Africa, northeast tropical Africa (Ethiopia), and east tropical Africa. It was first described by the British botanist Robert Allen Rolfe in 1913 as Eulophia ugandae and later transferred to the genus Oeceoclades in 1976 when Leslie Andrew Garay and Peter Taylor resurrected and revised that genus. The English botanist V.S. Summerhayes treated this species as a synonym of O. latifolia, but Garay and Taylor noted that while the two species share a superficial resemblance in the appearance of the labellum, they are distinct in vegetative morphology. The labellum of O. ugandae also has two swellings or protuberances between the lateral and midlobes, a feature that O. latifolia lacks.
Oeceoclades zanzibarica is a terrestrial orchid species in the genus Oeceoclades that is endemic to eastern Tanzania in the Zanzibar Archipelago. It was first described by the English botanist V.S. Summerhayes in 1927 as Eulophidium zanzibaricum and then later transferred to the genus Oeceoclades in 1976 when Leslie Andrew Garay and Peter Taylor resurrected and revised that genus. The lanceolate leaves, which gradually taper to a point, are unique to the genus and the floral morphology is most similar to O. alismatophylla. However, the two species differ in the shape of sepals and petals and in the proportions of the labellum.
