Prev Taxon: Genus Rhinerrhizopsis

Current Genus: Genus Rhomboda

Next Taxon: Genus Rhynchophreatia


Prev Species: Rhomboda novaehiberniae


Rhomboda polygonoides

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod, Orchadian 11 (1995) 333

Type: Dallachy s.n. (Australia, Mt. Macallister, Rockingham's Bay) (holo MEL)

Synonyms:

  • Zeuxine polygonoides (F.Muell.) P.J.Cribb, Austral. Orchid Res. 1 (1989) 147
  • Hetaeria polygonoides (F.Muell.) Dockrill, Austral. Pl. 3 (1966) 350
  • Epipactis polygonoides (F.Muell.) Eaton, Proc. Biol. Soc. Wash. 21 (1908) 65
  • Goodyera polygonoides F.Muell., Fragm. 8 (1873) 29
  • Orchiodes polygonoides (F.Muell.) Kuntze, Rev. Gen. Pl. (1891) 675
  • Hetaeria torricellensis (Schltr.) J.J.Sm., Repert. Spec. Nov. Regni Veg. 11 (1913) 554
  • Zeuxine torricellensis Schltr. in K.Schum. & Lauterb., Nachtr. Fl. Deutsch. Schutzgeb. Südsee (1905) 92
    - Type: Schlechter 14435 (holo B, lost; NSW)
  • Hetaeria falcatula J.J.Sm., Bull. Dép. Agric. Indes Néerl. 19 (1908) 26
    - Type: Versteeg 1596 (syn BO); 1632
  • Zeuxine falcatula (J.J.Sm.) Schltr., Bot. Jahrb. Syst. 45 (1911) 394
  • Zeuxine falcatula (J.J.Sm.) Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1911) 77
  • Zeuxine dipera Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1911) 83
    - Type: Schlechter 17700; 20055 (B, lost)
  • Zeuxine dipera Schltr. var. laxa Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1911) 84
    - Type: Schlechter 17811 (holo B, lost; iso BO, E, K, L 2x, MO, NSW)
  • Hetaeria gautierensis J.J.Sm., Repert. Spec. Nov. Regni Veg. 11 (1913) 553
    - Type: Gjellerup 841 (holo BO)

Stem creeping at the base, rooting, erect part 4-8 cm high, 4-5-leaved. Leaves petiolate, obliquely subovate-lanceolate, 3-9.5 by 0.75-2.1 cm, frequently slightly falcate, acuminate, acute, frequently mucronate; petiole channelled, including the tubular sheath 0.8-2.5 cm long. Inflorescence erect, laxly many-flowered; peduncle pubescent, 10-18.5 cm long, peduncle-scales several, with tubular base, acuminate, acute, sparsely pubescent, to 1-1.7 cm long, upwards becoming smaller and bract-like; rachis pubescent, 4.5-15 cm long. Floral bracts appressed to the ovary, ovate, acutely acuminate, concave, 1-nerved, ciliate, to 0.8 cm long, the upper ones smaller. Flowers patent, 0.7 cm diam. Median sepal with the petals forming a helmet-like structure, horizontal, held against the column, broadly ovate, 0.45 by 0.26 cm, subobtusely acuminate, strongly concave, glabrous, 1-nerved. Lateral sepals divergent, slightly recurved, obliquely ovate, 0.45 by 0.26 cm, subobtusely acuminate, concave, glabrous, 1-nerved. Petals cohering with the median sepal, strongly obliquely semiobovate, 0.45 by 0.26 cm, subobtusely acuminate, concave, 1-nerved. Lip slipper-shaped, 0.48 by 0.23 cm, somewhat fleshy, in outline ovate, at the base emarginate, underneath deeply grooved, basal part strongly inflated-concave, subquadrangular, margins slightly incurved, on either side near the base with a lobule appressed to the column, inside with a longitudinal, 2-ribbed, in the middle stronger thickening, at the base with two elongated, subulate, at the apex dentate, slightly curved, 0.1 cm long processes; margins beyond the column strongly incurved, funnel-shaped, lip terminated by a minute, 3-lobulate, at the apex recurved blade; lip when flattened 0.48 cm long, the basal quadrangular part 0.33 cm long, the much narrower upper part including the terminal lobe 0.14 by 0.13 cm. Column 0.25 cm long, at the base thin, lamellae on the adaxial side two, very large, longitudinal, parallel, transversely oblong, at the base ending in a rounded lobule; clinandrium deeply concave; rostellum bidentate; stigmata 2, oblong. Anther cordate, acutely acuminate. Ovary 0.65 cm long, 6-grooved, twisted, at the apex incurved, glabrous. (After Smith, 1909, as Hetaeria falcatula J.J.Sm.)


Sepals reddish brown, petals and lip white.

Terrestrial in lowland forest to lower montane forest; 100 to 1600 m.

Malesia (Moluccas, New Guinea), Australia

Indonesia (Papua Barat and Papua Prov.); Papua New Guinea. See map

distribution map

Intermediate growing terrestrial, requires shaded position.

February, March, April, May, August, September, November.

  • Smith, J.J., Nova Guinea 8, 1 (1909) 16, t. 5, fig. 15, as Hetaeria falcatula J.J.Sm.
  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 1 (1911) 81, as Zeuxine torricellensis Schltr.
  • Smith, J.J., Nova Guinea 12, 1 (1913) 10, as Hetaeria falcatula J.J.Sm.
  • Smith, J.J., Nova Guinea 12, 3 (1915) 191, as Hetaeria falcatula J.J.Sm.
  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 33, fig. 114, as Zeuxine dipera Schltr.
  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 33, fig. 111, as Zeuxine torricellensis Schltr.
  • Dockrill, A. W., Austral. Indig. Orchids 1 (1969) 106, fig., as Hetaeria polygonoides (F.Muell.) Dockrill
  • Schuiteman, A. & J.F. Wanma. New and noteworthy Orchid Species from the Arfak Mountains, West Papua Province, Indonesia. Malesian Orchid Journal 20 (2017) 89, fig. 30-31
  • Family Orchidaceae
  • Subfamily Orchidoideae
  • Tribe Cranichideae
  • Subtribe Goodyerinae
  • Genus Rhomboda
  • Species Rhomboda polygonoides

According to Ormerod (2017), the Solomon Islands records refer to R. demisii Ormerod.


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Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod, flower, photo André Schuiteman, from Arfak Mts., Schuiteman 2014-75

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod, plant in situ, photo André Schuiteman, from Arfak Mts., Schuiteman 2014-75

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod, leaves, photo André Schuiteman, from Arfak Mts., Schuiteman 2014-75

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria falcatula J.J.Sm., drawing J.J. Smith, from Janowsky 208

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria falcatula J.J.Sm., drawing J.J. Smith, from Janowsky 208

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria falcatula J.J.Sm., drawing J.J. Smith, from Janowsky 208

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria falcatula J.J.Sm., drawing J.J. Smith, from Versteeg 1632

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria falcatula J.J.Sm., drawing J.J. Smith, from von Rmer 807

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria falcatula J.J.Sm., drawing J.J. Smith, from Versteeg 1632

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria gautierensis J.J.Sm., drawing J.J. Smith, from Gjellerup 841

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Hetaeria gautierensis J.J.Sm., drawing J.J. Smith, from Gjellerup 841

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Zeuxine dipera Schltr., drawing R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 33, fig. 114

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Zeuxine torricellensis Schltr., drawing R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 33, fig. 111

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Zeuxine dipera Schltr. var. laxa Schltr., herbarium sheet, Schlechter 17811 (isotype specimen L)

Rhomboda polygonoides

Rhomboda polygonoides (F.Muell.) Ormerod,, as Zeuxine dipera Schltr. var. laxa Schltr., herbarium sheet, Schlechter 17811 (isotype specimen L)