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 w ide 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.

December.

  • 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).


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Agrostophyllum acuminatum

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