Prev Taxon: Genus Bulbophyllum section Pelma
Current Genus: Genus Bulbophyllum section Peltopus
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Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Sm., Repert. Spec. Nov. Regni Veg. 12 (1913) 400
Type: Gjellerup 1090 (holo BO; iso L)
Synonyms:
- Peltopus octarrhenipetalus (J.J.Sm.) Szlach. & Marg., Polish Bot. J. 46 (2001) 116
- Bulbophyllum quadrans J.J.Sm., Meded. Rijks-Herb. 23 (1915) 13
- Type: Janowsky 368 (syn BO); 418 (syn BO) - Bulbophyllum longipiliferum J.J.Sm., Bot. Jahrb. Syst. 66 (1934) 204
- Type: Mayr 539 (holo L; iso BO)
Rhizome creeping, 1.2-1.5 mm diam. Pseudobulbs ovoid, 0.2-0.6 cm apart, 1.1-2.5 by 0.3-0.5 cm, not or hardly flattened. Petiole 4-15 mm. Leaf blade elliptic to obovate, 3.3-7.5 by 0.8-1.4 cm, index 3.9-7.5, tip acute. Inflorescence 4-9 cm, 1-flowered. Peduncle 2-3 cm; bracts 2-3, the longest 3.5-5 mm. Floral bracts tubular, c. 3 mm, tip obtuse to acute. Pedicel and ovary 11-23 mm, with the node 1.7-3.5 mm from the floral bract. Flowers moderately opening. Median sepal ovate, 6-37 by 3-7 mm, index 1.212.3, tip short acuminate to caudate; margins glabrous to finely ciliate; thin; adx. glabrous to slightly pubescent; abx. glabrous. Lateral sepals free, oblique, 6-37 by 2.5-6 mm, index 1.5-15, tip acute to caudate; otherwise as the median sepal. Petals ovate to triangular, 0.4-1.3 by 0.9-2.5 mm, index 0.3-0.7, tip rounded to obtuse; margins glabrous to deeply lacerate; thin; surface glabrous. Lip approx. straight or somewhat curved, general outline approx. orbicular, ovate, elliptic, or triangular, 3.5-6.5 by 1.6-6 mm, index 1-3 (not spread), tip rounded to approx. acuminate; margins finely papillose; rather thick; surface approx. glabrous; adx. with a distinct basal concavity, basal teeth converging, together forming a transverse ridge with a notch half-way, basal part of the lip convex to slightly concave, gradually passing into the flat or convex top part of the lip; abx. with or without an inconspicuous, truncate median ridge. Column from ovary to the tip of the rostellum 1.5-1.8 mm; rostellum distinctly protruding; stigma orbicular, (slightly) protruding at its base; column-foot with a distinct, distinctly upwards pointing, rounded, central knob above the attachment of the lip. Anther abx. with a wide ridge; front margin not protruding. (After Vermeulen, 1993)
Sepals and petals white or cream-coloured. Lip white or purple.
Epiphyte in lower montane forest; 1600-2100 m.
Malesia (New Guinea).
Papua (Indonesia); see map
Intermediate growing epiphyte.
April, May, June, July, August, December.
- Smith, J.J., Nova Guinea 12, 4 (1916) 400, t. 148, fig. 277
- Smith, J.J., Nova Guinea 12, 4 (1916) 401, t. 148, fig. 278, as Bulbophyllum quadrans J.J.Sm.
- Vermeulen, J.J., Orchid Monogr. 7 (1993) 165, fig. 119
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Subtribe Bulbophyllinae
- Genus Bulbophyllum
- Section Peltopus
- Species Bulbophyllum octarrhenipetalum
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Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Smith, Orchid Monogr. 7 (1993) 165, fig. 119, J.J. Vermeulen, drawing, plant habit and flower analysis, based on a,c,f,i-l Gjellerup 1090 (iso L); d,g Janowsky 368 (L); e,h Mayr 539 (L)
Bulbophyllum octarrhenipetalum
Bulbophyllum ptychantyx J.J.Verm., Orchid Monogr. 7 (1993) 170, fig. 125, drawing J.J. Vermeulen, flower analysis, based on C 14485 (E); Cruttwell 3339 (holo L)
Bulbophyllum octarrhenipetalum
Bulbophyllum longipiliferum J.J.Sm., floral analysis, drawing J.J. Smith, from Mayr 539
Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Sm., floral analysis, drawing J.J. Smith, from Gjellerup 1090
Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Sm., column and lip, drawing J.J. Smith, from Gjellerup 1090
Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Sm., floral analysis, drawing J.J. Smith, from Gibbs 5504
Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Sm., habit, drawing M. Soemawinata, from Gibbs 5504
Bulbophyllum octarrhenipetalum
Bulbophyllum quadrans J.J.Sm., column and lip, drawing J.J. Smith, from Janowsky 418
Bulbophyllum octarrhenipetalum
Bulbophyllum quadrans J.J.Sm., floral analysis, drawing J.J. Smith, from Janowsky 418
Bulbophyllum octarrhenipetalum
Bulbophyllum longipiliferum J.J.Sm., herbarium sheet, Mayr 539 (isotype specimen BO)
Bulbophyllum octarrhenipetalum
Bulbophyllum octarrhenipetalum J.J.Sm., herbarium sheet, Gjellerup 1090 (holotype specimen BO)
Bulbophyllum octarrhenipetalum
Bulbophyllum quadrans J.J.Sm., herbarium sheet, Janowsky 368 (syntype specimen BO)