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Bulbophyllum mamberamense

Bulbophyllum mamberamense

Bulbophyllum mamberamense J.J.Sm., Meded. Rijks-Herb. 23 (1915) 15

Type: Janowsky 459 (holo BO)

Rhizome creeping, branched, rooting, terete. Pseudobulbs c. 2.5-3.5 cm apart, ovoid, obtuse, irregularly many ribbed, c. 2.2 by 1.6 cm. Leaf lanceolate, obtuse; base contracted in a petiole; upper side on either side of the midrib grooved; underneath obtuse prominent convex; margins recurved, fleshy-coriaceous, c. 13 by 4 cm; petiole c. 2.2 cm long. Inflorescences many-flowered, from the base of the pseudobulbs; peduncle terete, 0.18 cm; rachis c. 3 cm or more long, over the bracts c. 1.15 cm wide, the internodes 0.4 cm long. Floral bracts close together, distichous, imbricate, erect, incurved; base tubular, in front breaking open, conduplicate-triangular, acute, strongly keeled, c. 1.3 cm long. Flowers opening with intervals, large, c. 3.5 cm wide. Median sepal oblong, acute, inside on either side convex, 11-nerved, fleshy, c. 3.35 by 1.3 cm; midrib inside grooved, dorsally high, acute, keeled. Lateral sepals horizontal, divergent, falcate-incurved, obliquely oblong, acute, conduplicate-cymbiform, somewhat fleshy, c. 3.7 cm long, the conduplicate part slightly over 1 cm wide; keel high, acute. Petals very small, porrect, appressed to the column, obliquely transversely quadrangular, 1-nerved, fleshy, in total 0.95 by 0.33 cm, to the apex of the lobes 0.23 cm; apex obtuse bilobed, the lobes fimbriate, between these with an elongated, at the base dilated, 0.75 cm long setum. Lip mobile, simple, above the base recurved and making a straight angle with the lateral margins, subobovate-elliptic, obtuse, 7-nerved, thin fleshy, c. 2.6 by 1.55 cm; upper side convex, with a longitudinal groove which disappears towards the apex; keels 2, longitudinal, acute, above vanishing, in the basal part more raised and divergent in the basal 2/5th of the lip, between the keels transversely warty-rugose, the rest except the margins verrucose; margins in the basal part wavy-crenulate; underneath slightly concave, at the base convex, with a longitudinal groove which disappears to the top, on either side with 3 short grooves. Column above dilated and almost to the middle bifid, 0.95 cm long; clinandrium transverse deeply concave; filament short; stelidia large, divergent, obliquely oblong, at the apex unequally bidentate, upper margin sparsely very minutely denticulate, the lower tooth large, acute. Anther cucullate, in outline rounded-rhombic, 0.3 cm wide; base bilobulate; apex rounded-cucullate, apical margins subtruncate. Pollinia 4, unequal, united in 2 obliquely triangular-pear-shaped, 0.2 cm long bodies; the inner pollinia smaller than the outer ones.; stigma large, transversely 6-angular, with a longitudinal rib, in the basal part with 2 obtuse lobes, the margins raised, dilated and forming a thickened A-shape; column-foot making an almost straight angle with the ovary, with incurved apex, oblong, truncate, fleshy, 0.93 cm long. Ovary elongate-obconical, 6-grooved, 0.75 cm long; pedicel 0.8 cm long. (After Smith, 1916)

Leaves above shining, underneath opaque. Flowers brown with white stripes.

Epiphyte in lowland forest; 0-400 m.

Malesia (New Guinea).

Papua (Indonesia); see map

Distribution of Bulbophyllum mamberamense in New Guinea

Warm growing epiphyte.


  • Smith, J.J., Nova Guinea 12, 4 (1916) 418, t. 157, fig. 295
  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Dendrobieae
  • Subtribe Bulbophyllinae
  • Genus Bulbophyllum
  • Section Intervallatae
  • Species Bulbophyllum mamberamense

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Bulbophyllum mamberamense

Bulbophyllum mamberamense J.J.Sm., floral analysis, drawing J.J. Smith, from Janowsky 459

Bulbophyllum mamberamense

Bulbophyllum mamberamense J.J.Sm., column and lip, drawing J.J. Smith, from Janowsky 459

Bulbophyllum mamberamense

Bulbophyllum mamberamense J.J.Sm., herbarium sheet, Janowsky 459 (holotype specimen BO)