Category: OrchideenJournal

''Three new orchid species from the island of Mindanao and Palawan, Philippines''

10/6/2018

Derek Cabactulan, Dr. Miguel David De Leon, Reynold Pimentel & Jim Cootes

Bulbophyllum pyrrosifolium Photo: Miguel D. De Leon

Abstract: A new Bulbophyllum species, Bulbophyllum pyrrosifolium (sect. Brachystachyae), and a new Dendrobium species are proposed from the province Bukidnon, Mindanao and a new Dendrobium species from the island province of Palawan is also proposed.

The unusual and attractive foliage of Bulbophyllum pyrrosifolium is similar to the Bornean species Bulbophyllum botryophorum Ridley. Unlike the latter, the leaves of B. pyrrosifolium are ermarginate and do not lay on the substrat. The pseudobulbs of B. pyrrosifolium are clustered on the rhizome whilst those of Bulbophyllum botryophorum are spaced at intervals approximately 5 - 9 millimeters; also B. pyrrosifolium has a few-flowered inflorescence whilst that of Bulbophyllum botryophorum is a many-flowered, compact inflorescence.

Bulbophyllum pyrrosifolium is only known from Bukidnon on Mindanao. It grows as an epiphytes, in partial shade in mossy dipterocarp forest, at 1,600 metres above sea level.

Published in OrchideenJournal, Vol. 6-5: 9 - 13
http://www.orchideen-journal.de/descriptions.htm

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''Bulbophyllum irianae and B. adolinae (Orchidaceae: Dendrobiinae), two new species of sections Hoplandra and Peltopus from Indonesian New Guinea''

10/5/2018

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André Schuiteman, Ed De Vogel, Charlie D. Heatubun, Jimmy F. Wanma, Filep Mambor, Daawia Suhartawan & Eline Hoogendijk

Bulbophyllum irianae Photo: Daawia Suhartawan

Bulbophyllum irianae Photo: Eline Hoogendijk

Bulbophyllum adolinae Photos: André Schuiteman

Abstract: Two new species of Bulbophyllum are described here as Bulbophyllum irianae (sect. Hoplandra) and Bulbophyllum adolinae (sect. Peltopus)

Bulbophyllum irianae ist most similar to Bulbophyllum obovatifolium J.J.Sm., but differs in the apex of the median sepal which is a long, solid, terete, subulate awl c. 0.8 cm long that is adaxially in the lower half flat, has no crest or keel, and narrows continuously and gradually into very thin, narrowly acute tip (versus median sepal keeled, acute, concave, the top half in the middle conduplicate, laterally compressed); the lip from above slender narrowly triangular with a narrowly acute apex and a smooth upper surface without ornamentation (versus lip from above tongue-shaped with an obtuse apex and a channeled upper side with two ribs and a low small rib in the middle); lateral sepals c. 8.2 cm long and 6 times twisted around each-other (versus lateral sepals c 4.5 cm long and not twisted).

Bulbophyllum harposepalum Schltr. is often treated as a synonym of B. obovatifolium. It differs from B. irianae in the much smaller, not twisted sepals, the broader and obtuse lip with a median depression and obtuse apex, and in the median sepal which is towards the top conduplicate-compressed and keel-like, rather blunt, not gradually tapering.

It grows as a crown epiphyte in slightly disturbed rain forest with trees up to c. 45 m tall, with much undergrowth. Terrain undulating to steep. Elevation c. 300 m. Flowering in the wild in February.

Bulbophyllum adolinae differs from B. octarrhenipetalum J.J.Sm. in the terminal callus of the column-foot, which is bilobed, with one lobe pointing upwards and one, almost equally large, lobe pointing downwards (versus only one upwards-pointing callus in B. octarrhenipetalum); rostellum minute, erect (versus rostellum distinctly protruding, porrect); petals only 0.6 mm wide (versus petals 0.9 - 2.5 mm wide), sepals with glabrous, not ciliate, margins, and the bright yellow lip (versus lip white or purple).

A thorough revision of Bulbophyllum sect. Peltopus was published by J.J. Vermeulen (1993). Among the 32 species recognized by him, only B. octarrhenipetalum J.J.Sm. is similar enough that a careful comparison is required to tell them apart. Vermeulen's view, B. octarrhenipetalum is an extraordinarily variable species. Field studies are needed in order to establish if the variation is truly infraspecific and not caused by hybridization. Bulbophyllum adolinae was discovered in 2014 during a joint field trip in the Arfak Mountains, West Papua Province, Indonesia, carried out by staff of the Royal Botanic Gardens, Kew (André Schuiteman and Marie Briggs) and the Universitas of Papua.

It is a Epiphyte on moss-covered tree trunks in montane forest. Elevation 1970 m. Flowering observed in July.

Published in OrchideenJournal, Vol. 6-5: 3 - 8
http://www.orchideen-journal.de/descriptions.htm

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''Nineteen new orchid species from northern Mindanao, Philippines''

4/17/2018

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Derek D. Cabactulan, Jim Cootes, Miguel David De Leon, Reynold B. Pimentel, Fernando B. Aurigue, and Neil K. Binayao III

Bulbophyllum alboaligerum Photo: Miguel D. de Leon

Bulbophyllum crassiusculum Photo: Miguel D. de Leon

Bulbophyllum prasinoglossum Photo: Miguel D. de Leon

Bulbophyllum puberulosum Photo: Miguel D. de Leon

Bulbophyllum vinicolor Photo: Miguel D. de Leon

Epicrianthes charishampliae Photo: Miguel D. de Leon

Epicrianthes jimcootesii Photo: Miguel D. de Leon

Epicrianthes neilkonradii Photo: Miguel D. de Leon

Abstract: (...), Bulbophyllum alboaligerum (sect. Macrocaulia) Cabactulan, Cootes, M.D. De Leon & Pimentel, Bulb. crassiusculum (sect. Stachysanthes) Cabactulan, Cootes, M.D. De Leon & Pimentel, Bulb. prasinoglossum (sect. Brachystachyae) Cabactulan, Cootes, M.D. De Leon, & Pimentel, Bulb. puberulosum (sect. Stachysanthes) Cabactulan, Cootes, M.D. De Leon, & Pimentel, Bulb. vinicolor ( sect. Brachystachyae) Cabactulan, Cootes, Aurigue, Pimentel & M.D. De Leon, (...), Epicrianthes charishampeliae Cabactulan, M.D. De Leon, Cootes & Pimentel, Epicr. jimcootesii Cabactulan, M.D. De Leon & Pimentel, Epicr. neilkonradii Cabactulan, Cootes, M.D. De Leon & Pimentel, (...), are all described as new to science.

Bulbophyllum alboaligerum is most similar to Bulb. leproglossum J.J. Vermeulen and Lamb from Borneo. It differs in the edges of the dorsal sepal and the petals, which in Bulb. alboaligerum are slightly erose, whilst the dorsal sepal and petals of Bulb. leproglossum are entire; and the apices of the labellum which in Bulb. alboaligerum is papillose, whereas that of Bulb. leproglossum is glabrous. The lateral sepals are also occasionally adnate as in Bulbophyllum pelicanopsis J.J. Verm & Lamb.

Bulbophyllum crassiusculum is most similar to Bulb. unguiculatum Rchb. f., but differs in the shape of the labellum which in Bulb. crassiusculum is sharply curved downwards with a recurving apex, the labellum of Bulb. unguiculatum is evenly curved; the edge of the labellum of Bulb. crassiusculum is minutely ciliate, whereas the edge of the labellum of Bulb. unguiculatum is entire; the petals of Bulb. crassiusculum are lanceolate, whereas the petals of Bulb. unguiculatum are obovate to elliptic.

Bulbophyllum prasinoglossum is most similar to Bulb. submarmoratum J.J. Sm., but differs in the much shorter, upright infl orescence of Bulb. prasinoglossum; and the positioning of the ridges on the labellum, which in Bulb. prasinoglossum are in a central position, close together, the central ridges on the labellum of Bulb. submarmoratum are more widely spaced; the petals of Bulb. prasinoglossum are ovate, whereas those of Bulb. submarmoratum are triangular.

Bulbophyllum puberulosum is most similar to Bulb. crassiusculum Cabactulan, Cootes, M.D. De Leon and Pimentel, but differs in the size of the flowers, 6 mm across the lateral sepals in Bulb. crassiusculum versus 4.3 mm across the lateral sepals in Bulb. puberulosum; the shape of the leaves in Bulb. crassiusculum are semi-terete, whereas the leaves of Bulb. puberulosum are flattened (this feature has remained constant amongst the flowering plants examined from different localities); and the keel of Bulb. crassiusculum, at its column foot is low and bluntly, broadly triangular when viewed in profi le, whereas the keel of Bulb. puberulosum is more prominent and runs from the centre of the column foot to the column; when viewed from the front it is triangular, raised, and well-demarcated from the column foot.

Bulbophyllum vinicolor is most similar to Bulb. hyposiphon from Borneo but differs in the shape of the labellum, which in Bulb. vinicolor is distinctly recurved, with a deep channel lengthwise, whereas the labellum of Bulb. hyposiphon is gently curved; the shape of the stelidia of Bulb. vinicolor are three-toothed at the apex, whereas the stelidia of Bulb. hyposiphon have a single, minute tooth centrally.

Epicrianthes charishampeliae is most similar to Bulbophyllum stenomeris J.J. Verm. and O’Byrne, from section Epicrianthes, but differs in the ornamentation of the labellum, which in Epicr. charishampeliae is vesiculate, whereas the labellum of Bulb. stenomeris is almost glabrous; and the column of Epicr. charishampeliae which bears a single, downward-pointing tooth, whereas the column of Bulb. stenomeris bears two, downward-pointing teeth.

Epicrianthes jimcootesii is most similar to Epicrianthes davidii, but differs in the number of appendages on the petals, which in Epicr. jimcootesii number up to 10 on each side, whereas the petal appendages of Epicr. davidii number up to 6 only on each side; the labellum of Epicr. jimcootesii is heavily papillose on its sides and underside, whereas the labellum of Epicr. davidii is glabrous.

Epicrianthes neilkonradii is most similar to Epicr. aquinoi Cootes, M.D. De Leon and Naive, but differs in surface structure of the labellum which in Epicr. neilkonradii is vesicular to papillose, whereas the labellum surface of Epicr. aquinoi is glabrous; the petal appendages of Epicr. neilkonradii vary from three to fi ve in number (the outer two can be vestigial), whereas the petal appendages of Epicr. aquinoi are always three in number; and the leaves of Epicr. neilkonradii are lanceolate and purplish dark green, whilst those of Epicr. aquinoi are ovate to ovate-cordate and plain green to bright green.

Published in OrchideenJournal, Vol. 6-2: 3 - 21
http://www.orchideen-journal.de/descriptions.htm

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''Three new orchid species from the island of Mindanao and Palawan, Philippines''

Derek Cabactulan, Dr. Miguel David De Leon, Reynold Pimentel & Jim Cootes

Bulbophyllum pyrrosifolium Photo: Miguel D. De Leon

Published in OrchideenJournal, Vol. 6-5: 9 - 13http://www.orchideen-journal.de/descriptions.htm

''Bulbophyllum irianae and B. adolinae (Orchidaceae: Dendrobiinae), two new species of sections Hoplandra and Peltopus from Indonesian New Guinea''

André Schuiteman, Ed De Vogel, Charlie D. Heatubun, Jimmy F. Wanma, Filep Mambor, Daawia Suhartawan & Eline Hoogendijk

Bulbophyllum adolinae Photos: André Schuiteman

Published in OrchideenJournal, Vol. 6-5: 3 - 8http://www.orchideen-journal.de/descriptions.htm

''Nineteen new orchid species from northern Mindanao, Philippines''

Derek D. Cabactulan, Jim Cootes, Miguel David De Leon, Reynold B. Pimentel, Fernando B. Aurigue, and Neil K. Binayao III

Published in OrchideenJournal, Vol. 6-2: 3 - 21http://www.orchideen-journal.de/descriptions.htm

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Published in OrchideenJournal, Vol. 6-5: 9 - 13
http://www.orchideen-journal.de/descriptions.htm

Published in OrchideenJournal, Vol. 6-5: 3 - 8
http://www.orchideen-journal.de/descriptions.htm

Published in OrchideenJournal, Vol. 6-2: 3 - 21
http://www.orchideen-journal.de/descriptions.htm