Next Species: Ceratostylis lancipetala

Ceratostylis keysseri

Ceratostylis keysseri

Ceratostylis keysseri Schltr., Repert. Spec. Nov. Regni Veg. 16 (1919) 214

Type: Keysser s.n. (X-1912, Saruwaged Mts., 2400-3000 m) (holo B, lost), neotype

Epiphytic, erect, slender, 20-22 cm high. Rhizome very short. Roots filiform, flexuose, thin, finely pilose. Stems very slender, filiform, 10-14 cm long, scarcely 0.1 cm diam., 1-leaved, at the base enveloped by a few clasping, pale sheaths. Leaf erect-patent or suberect, filiform-subulate, 6-7.5 cm long, scarcely 0.1 cm diam. Floral heads sessile, several-flowered, i. e. with several fascicled, 1-flowered inflorescences, surrounded by a few elliptic acuminate scales; peduncle very short. Floral bract elliptic, shortly acuminate, distinctly shorter than the pedicellate ovary. Flowers suberect. Sepals oblong, rather obtuse, 3-nerved, glabrous, 0.3 cm long. lateral sepals oblique, at the base along the front margin dilated; mentum very short, obtuse. Petals obliquely and obtusely oblong-lanceolate, rather obtuse, 1-nerved. almost as long as the sepals. Lip in outline narrowly ovate, carnose-thickened in apical third, obtuse, as long as the petals, with two parallel, minutely papillose-puberulous keels from the base decurrent to near the middle, otherwise glabrous, below the middle 0.13 cm wide. Column short, arms short, concave, obliquely and shortly semi-oblong. Column-foot very short. Ovary pedicellate, subclavate, finely white-pilose, 0.28 cm long. (After Schlechter, 1919).

Not recorded.

Epiphyte in upper montane forest. Altitude 2400-3048 m.

Malesia (New Guinea, endemic).

Papua New Guinea. See map

distribution in New Guinea

Cool growing epiphyte.

January, October.

  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Podochileae
  • Subtribe Eriinae
  • Genus Ceratostylis
  • Section Ceratostylis
  • Species Ceratostylis keysseri
  • Royen, P. van, Alp. Fl. New Guinea 2 (1979) 462, fig. 159

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Ceratostylis keysseri

Ceratostylis keysseri Schltr., drawing Pieter van Royen, in P.Royen, Alp. Fl. New Guinea 2 (1979) 462, fig. 159, based on Hartley 11249

Ceratostylis keysseri

Ceratostylis keysseri Schltr., herbarium sheet, Hartley 11249, isoneotype specimen (L)