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Plocoglottis mamberamensis

Plocoglottis mamberamensis

Plocoglottis mamberamensis J.J.Sm., Nova Guinea 14 (1929) 351, pl. 45, fig. 12

Type: Feuilletau de Bruyn 148 (holo L)

Roots 0.15-0.2 cm diameter. Rhizome creeping 0.9 cm diameter, internodes between stems 6. Stems 3.5 cm apart, 103 by 0.4 cm, angular, internodes 18, 4.7-7.5 cm long; 10-leaved. Cataphylls 9. Leaves petiolate; sheaths 5.5-6 cm long; petiole 4.5 cm long; blade 29-37.3 by 4-4.8 cm, index 7-8, linear-lanceolate, base cuneate, apex acuminate, glabrous, with 5 prominent veins underneath. Inflorescence 73 cm long, 40-flowered. Peduncle 45 by 0.4-0.44 cm, pubescent, internodes 6, 1.4-12.5 cm long; peduncle scales 0.2-3.1 cm long, tubular, apex obtuse to acuminate, sparsely pubescent; rachis 28 by 0.3 cm, densely pubescent, internodes 42, 0.2-8.8 cm long. Sterile bracts 2; floral bracts 0.61 by 0.41 cm, broadly lanceolate, apex acuminate, densely pubescent, with 8 distinct veins. Flowers 2.1 cm wide. Median sepal 1.2 by 4.1 cm oblong-lanceolate, apex subacute, moderately abaxially pubescent, above half to apex thick in texture, 7 distinct veins. Lateral sepals 1.1 by 0.41 cm, oblong-lanceolate, falcate near apex, base oblique with short lobule, apex acuminate, pubescent, with 7 distinct veins. Petals 1.1 by 0.26 cm, lanceolate, base broadly cuneate, apex acute, sparsely pubescent at base on both sides, moderately thick in texture, lateral margin thin, with 5 distinct veins. Lip in total 0.9 by 0.53 cm, adnate to column-foot with basal lamellae, quadrangular, with 10 distinct veins, at the base with a small sac, formed by the column-foot and the lip base, 0.1 cm long; with two basal lamellae, grooved along the median on adaxial side, on the adaxial side with two thick keels, hill-shaped at base to gradually decurrent on the apex, lateral margin in basal half thick, entire, apex abruptly truncate, in the middle with 0.11 cm long, triangular, acuminate acumen; glabrous. Column 0.6 by 0.2 cm, clavate, sparsely abaxially pubescent; stigma obdeltoid, rostellum orbicular. Anther glabrous, with a long keel. Pollinia 0.1 by 0.05 cm, half round in lateral view. Pedicel with ovary 1.6 by 0.1-0.2 cm, clavate. (After Eang Hourt, unpublished manuscript 2004)

Flower yellow with red dots.

Terrestrial in lowland forest.

Malesia (New Guinea).

Papua (Indonesia). See map

distribution map

Warm growing terrestrial, requires shaded position.


  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Collabieae
  • Subtribe Not used
  • Genus Plocoglottis
  • Section Caulescentes
  • Species Plocoglottis mamberamensis

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Plocoglottis mamberamensis

Plocoglottis mamberamensis J.J.Sm., floral analysis, drawing J.J. Smith, from Feuilletau de Bruyn 148

Plocoglottis mamberamensis

Plocoglottis mamberamensis J.J.Sm., sepals, petal, and anther, drawing J.J. Smith, from Feuilletau de Bruyn 148

Plocoglottis mamberamensis

Plocoglottis mamberamensis J.J.Sm., herbarium sheet, Feuilletau 148 (holotype specimen L)