Next Species: Agrostophyllum acutum

Agrostophyllum acuminatum

Agrostophyllum acuminatum

Agrostophyllum acuminatum Ormerod, Malesian Orchid J. 16 (2015) 49, fig.

Type: T.M. Reeve 5925 (holo K, iso LAE, NSW)

Herb. Roots and rhizome not seen. Stem elliptic in section, laxly leafy, over 100 by 1.25 cm, 1.6-1.7 cm wide across the sheaths; internodes partly exposed. Leaves ligulate, thin,19.2-25.5 by 2.7-3.0 cm;leaf sheaths compressed tubular, slightly inflated, smooth, striate dry, truncate, half open, along exposed dorsal edge 2.5-3.4 cm long, 1.2-1.6 cm wide, usually estipulate but sometimes with a deltate point; apex acute. Inflorescence terminal, subglobose, composed of numerous bracts, sheaths and flowers, c. 4 by 5.5 cm. Pedicel and ovary subterete, 1 cm long. Median sepal ovate-elliptic, 0.59 by 0.28 cm; apex acuminate; midnerve low carinate; 3-nerved. Lateral sepals obliquely ovate-lanceolate, 0.72 by 0.28 cm (0.62 cm along midrib); apex acuminate; midnerve carinate in upper half; 3-nerved. Petals elliptic, 0.48 by 0.20 cm; apex acute; 3-nerved. Lip 3-lobed, 0.7 cm long; hypochile retrorsely conical-saccate, obtuse 0.1-0.11 cm, lateral lobes obliquely obtuse, c. 0.3 by 0.16 cm, 0.15 cm high; ligu1a subquadrate, truncate; epichile trilobulate, c. 0.4 by 0.39 cm, with subacute apex. Column subclavate, 0.28-0.29 cm long.
(after Ormerod 2015)

Leaf sheath with narrow black margin. Flowers cream-coloured, lip white.

Not indicated. Altitude 1600 m.

New Guinea, endemic.

Papua New Guinea, Southern Highlands Prov.

Cool growing epiphyte.


  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Undetermined
  • Subtribe Agrostophyllinae
  • Genus Agrostophyllum
  • Section Agrostophyllum
  • Species Agrostophyllum acuminatum

Agrostophyllum acuminatum is a tall plant like A. elatum Schltr. but it has longer, broader leaves, larger inflorescences, acuminate sepals (versus acute), and the lip epichile is trilobulate (versus entire).

Sponsored Ads

Agrostophyllum acuminatum

Agrostophyllum acuminatum Ormerod, drawing by Paul Ormerod in Malesian Orchid J. 16 (2015) 49, fig., after the holotype: T.M. Reeve 5925.