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Ceratostylis gracilicaulis

Ceratostylis gracilicaulis

Ceratostylis gracilicaulis Schltr., Bot. Jahrb. Syst. 58 (1922) 71

Type: Ledermann 9967 (holo B, lost)

Epiphytic, erect, caespitose, 22-27 cm high. Rhizome very short. Stems very slender, terete, 8-17 by 0.15 cm, at the base enveloped with several acuminate, pale grey sheaths, 1-leaved. Leaves erect, linear or linear-lanceolate, 6-10 by 0.3-0.5 cm, acute, base shortly weakly petiolate-attenuate, subcoriaceous, usually slightly more than half as long than the stem. Inflorescences several, 1-flowered, fascicled, arranged in a subglobose, 1 cm wide, sessile head, surrounded with elliptic, acuminate scales. Floral bracts elliptic, apiculate, hyaline, as long as the ovary. Flowers outside white-hairy. Sepals oblong, 0.3 cm long, subacute, lateral sepals at the base along the front margin forming an oblongoid, strongly obtuse, 0.1 cm long sac. Petals obliquely linear-ligulate, acute, Almost as long as the sepals. Lip at the base shortly subunguiculate-narrowed, lanceolate-oblong, 0.4 cm long, in apical half somewhat narrowed and carnose-thickened, with two thin, parallel keels extending from the base to the middle. Column semiterete, glabrous, about half as long as the lip, stigma-arms elliptic, obtuse. Ovary shortly pedicellate, clavate, 0.2 cm long, pilose. (After Schlechter, 1922).

Flower greenish white, outside with white hairs.

Epiphyte in montane forest. Altitude 1000 m.

Malesia (New Guinea, endemic).

Papua New Guinea. See map

distribution in New Guinea

Intermediate growing epiphyte.


  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Podochileae
  • Subtribe Eriinae
  • Genus Ceratostylis
  • Section Ceratostylis
  • Species Ceratostylis gracilicaulis

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Ceratostylis gracilicaulis

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