Prev Taxon: Genus Devogelia

Current Genus: Genus Didymoplexis

Next Taxon: Genus Diglyphosa

Next Species: Didymoplexis pallens

Didymoplexis micradenia

Didymoplexis micradenia

Didymoplexis micradenia (Rchb.f.) Hemsl., J. Linn. Soc., Bot. 20 (1883) 311


  • Epiphanes micradenia Rchb.f. in Seem., Fl. Vitiensis (1868) 295
    - Type: Seemann 610 (holo W 48230; iso K)
  • Leucorchis micradenia (Rchb.f.) Benth. & Hook.f. ex Drake, Ill. Fl. Ins. Pacif. 7 (1892) 313
  • Didymoplexis minor J.J.Sm., Bull. Inst. Bot. Buitenzorg 7 (1900) 1
    - Type: J.J. Smith 74 (Java, Buitenzorg) (holo BO; iso L)
  • Didymoplexis neocaledonica Schltr., Bot. Jahrb. Syst. 39 (1906) 50
    - Type: Schlechter 15748 (holo B, lost)
  • Didymoplexis minor J.J.Sm. var. samoensis H.Fleischm. & Rech., Denkschr. Kaiserl. Akad. Wiss., Math.-Naturwiss. Kl. 85 (1910) 251
    - Type: Rechinger 1641 (holo W 3080)
  • Didymoplexis samoensis (H.Fleischm. & Rech.) Schltr., Repert. Spec. Nov. Regni Veg. 9 (1910) 85
  • Didymoplexis papuana Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1911) 43
    - Type: Schlechter 16578; 18106; 18413 (syn B, lost; iso BO, L); 19974; 20359 (B, probably lost)

Basionym: Epiphanes micradenia

Leafless terrestrial, erect, very small, 8-15 cm high. Tuber fusiform, horizontal, stem straight or almost straight, with a few small, scale-like sheaths, terete, glabrous. Inflorescence rather laxly 4-8-flowered, erect. Floral bracts scale-like, ovate, obtuse, patent, glabrous, very small. Flowers erect. Median sepal narrowly oblong-ligulate, obtuse, at the apex concave, 0.8 cm long, in basal third or fourth adnate to the lateral sepals. Lateral sepals connate into an oblong blade which is obtusely and obliquely bilobate in apical third, glabrous, 0.6 cm long. Petals linear-ligulate, obtuse, apex subfalcate, along the upper margin to below the apex adnate to the median sepal, along the lower margin in basal third adnate to the lateral sepal, glabrous, 0.7 cm long. Lip at the base indistinctly clawed, cuneate, in front subtruncate, 3-lobulate, 0.7 cm long, in front 0.3 cm wide, lobes very short, the laterals deeply cleft, the median not longer, in front dentate, with 3 parallel bands of papillae, the bands extending from basal fifth to below the apex, decurrent, united in front. Column slender, semiterete, glabrous, almost without a foot, towards the apex distinctly dilated, 0.6 cm long. Anther suborbicular-cucullate, glabrous, dorsally obtusely 2-gibbose. Ovary cylindrical, glabrous, about 0.8 cm long. Fruit fusiform, about 2.3 cm long, near the middle 0.6 cm across, when mature together with the elongated pedicel up to 19 cm long. (After Schlechter, 1911-1914, as Didymoplexis papuana Schltr.).

Note: Easily recognised by the dentate front margin of the lip.

Terrestrial in forest. Altitude 30-400 m.

Malesia (Java, New Guinea), Solomon Is., Vanuatu, New Caledonia, Fiji, Samoa, Tonga.

Papua (Indonesia); Papua New Guinea. See map

distribution in New Guinea

Terrestrial, probably parasitic on fungi and probably impossible to grow under normal conditions.

July, August, September, October.

  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Gastrodieae
  • Genus Didymoplexis
  • Species Didymoplexis micradenia
  • Smith, J.J., Icon. Bogor. 2 (1903) 9, t. 102A, as Didymoplexis minor J.J.Sm.
  • Smith, J.J., Orchid. Java (1905) 79, as Didymoplexis minor J.J.Sm.
  • Smith, J.J., Orchid. Java, Fig.-Atl. (1908) fig. 53, as Didymoplexis minor J.J.Sm.
  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 19, fig. 61, as Didymoplexis papuana Schltr.
  • Lewis, B.A. & P.J. Cribb, Orchids of the Solomon Islands and Bougainville (1991) 65, fig. 11M-O

Sponsored Ads

Didymoplexis micradenia

overview picture

Didymoplexis micradenia

Didymoplexis minor J.J.Sm., drawing J.J. Smith, from Gjellerup 284

Didymoplexis micradenia

Didymoplexis papuana Schltr., from Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 19, fig. 61

Didymoplexis micradenia

Didymoplexis papuana Schltr., herbarium sheet, Schlechter 18413, isotype specimen (L)

Didymoplexis micradenia

Didymoplexis papuana Schltr., herbarium sheet, Schlechter 18413, isotype specimen (BO)