Thrixspermum congestum

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, Australasian Sarcanthinae (1967) 27

Synonyms:

  • Cleisostoma congestum F.M.Bailey, Proc. Roy. Soc. Queensland 11 (1895) 17
    - Type: Nugent 10 (Australia, Queensland, Cairns) (holo BRI)
  • Thrixspermum adenotrichum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 962
    - Type: Schlechter 18923 (holo B, lost)
  • Thrixspermum adenotrichum Schltr. var. eitapense Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 963
    - Type: Schlechter 19991; 19998 (syn B, lost)

Basionym: Cleisostoma congestum

Epiphyte, erect or ascending; roots filiform, glabrous. Stem terete, rather rigid, many-leaved, to 20 cm long, 0.3 cm diam., covered with the striate leaf-sheaths. Leaves ligulate, obliquely and obtusely bilobulate, 5-7 cm long, near the middle 7-1.2 cm wide. Inflorescence with a long peduncle, erect-patent, densely several-flowered; peduncle 14-22 cm long. Floral bracts lanceolate-subulate, much shorter than the ovary. Ovary glabrous, 0.5 cm long. Flowers erect-patent, opening in succession. Sepals oblong-ligulate, apiculate, glabrous, 0.6-0.7 cm long. Lateral sepals oblique. Petals ligulate, acute, almost as long as the sepals. Lip cucullate-concave, at the base shortly saccate, semiorbicular, at the apex 3-lobed, 0.6-0.7 cm long, when flattened between the tips of the lateral lobes 1 cm wide; inside with a short, bilobulate, tongue-like callus; the whole lip, except for the central part, densely covered with patent glandular hairs, especially along the margins; lateral lobes obliquely oblong, obtuse; mid-lobe short, about as long as the lateral lobes. Column short, glabrous. Anther reniform-cucullate, glabrous; pollinia obliquely pear-shaped; stipe very short; viscidium rounded. (After Schlechter, 1911-1914, as Thrixspermum adenotrichum Schltr.)


Flower [creamy] white, on the lip with brown dots.

Epiphyte in lowland forest, also on garden trees; 10 to 450 m.

Malesia (New Guinea), Australia, Solomon Islands, Vanuatu, New Caledonia.

Papua (Indonesia); Papua New Guinea. See map

distribution map

Warm growing epiphyte, requires light position.

February, August, December.

  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 340, fig. 1310, as Thrixspermum adenotrichum Schltr.
  • O'Byrne, P., Lowland Orchid. Papua New Guinea (1994) 546, fig.
  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Vandeae
  • Subtribe Aeridinae
  • Genus Thrixspermum
  • Section Dendrocolla
  • Species Thrixspermum congestum

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Thrixspermum congestum

overview picture

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, habit, photo A. Schuiteman, based on Yumte 142

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, habit, photo A. Schuiteman, based on Yumte 173

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, flower, photo A. Schuiteman, based on Yumte 173

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, plant habit, photo E.F. de Vogel, based on Leiden cult. 20030785

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, plant habit, photo E.F. de Vogel

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, inflorescence, flower lateral view, photo E.F. de Vogel

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, flower, oblique front view, photo E.F. de Vogel

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, flower, front view. Road near Malasait, c. 550 m., photo E.F. de Vogel

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, flower, oblique front vieww, photo E.F. de Vogel, based on Leiden cult. 20030785

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, flower, oblique front vieww, photo E.F. de Vogel, based on Leiden cult. 20030785

Thrixspermum congestum

Thrixspermum congestum (F.M.Bailey) Dockrill, habit and floral analysis, drawing N.H.S. Howcroft 284, based on FRI cult.

Thrixspermum congestum

Thrixspermum adenotrichum Schltr., drawing R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 340, fig. 1310