Prev Taxon: Genus Agrostophyllum
Current Genus: Genus Agrostophyllum section Agrostophyllum
Next Taxon: Genus Agrostophyllum section Appendiculopsis
Agrostophyllum gahavisukae
Agrostophyllum gahavisukae Ormerod, Orchadian 17 (2013) 377, fig.
Type: T.M. Reeve 6353 (holo K;iso LAE).
Synonyms:
Epiphytic(?) herb. Roots not seen. Stems caespitose, sublaxly foliose, 24.7-27.5 by 0.3-0.4 cm across the sheaths; at the base subterete, higher up compressed. Leaves linear ligulate, obliquely erect, 6-8.6 by 0.25-3 cm; apex equally to unequally bidentate, tips the teeth 0.02-0.1 cm long; leaf sheaths open to near the apex of the next sheath, its stipules lanceolate-subulate, 0.5 cm long, acute. Inflorescence terminal, composed of bracts and sheaths, probably successively 1- flowered, c. 1.5 by 0.3-0.5 cm. Pedicel and ovary terete, 0.9 cm long. Median sepal oblong-elliptic, 0.715 by 0.295 cm; upper quarter carinate; apex acute; 3-nerved. Lateral sepals obliquely oblong elliptic, 0.85 by 0.295 cm (0.79 cm along midrib; upper half carinate; apex subacuminate; 4-5-nerved. Petals oblong lanceolate, 0.65 by 0.175 cm; apex acute; 3-nerved. Lip 3-lobed, 0.92 cm long; hypochile shortly retrorse-saccate, 0.4 by 0.19• cm, its lateral lobes rounded-oblique; ligula subquadrate, bicuspidate, papillose-pubescent, raising c. 1 mm above sidelobes; epichile widely rhombic, weakly trilobulate,0.52 by 0.7 cm, its midlobule widely and shortly triangular, 0.14 by 0.4 cm. Column obliquely erect, 0.4 cm long (without anther cap).
(after Ormerod 2013)
Leaf sheaths with black margin. Flowers white, slightly translucent, lip (epichile?) with yellow patch.
Montane forest. Altitude 2250 m.
Malesia (New Guinea), endemic.
Papua New Guinea (Eastern Highlands Prov.). see map
Cool growing epiphyte.
December
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Undetermined
- Subtribe Agrostophyllinae
- Genus Agrostophyllum
- Section Agrostophyllum
- Species Agrostophyllum cheirophyton
Agrostophyllum gahavisukae is similar to A. huonense Ormerod, but differs in the longer leaf sheaths (0.5 vs 0.03-0.1 cm), a shorter ovary (0.9 versus 1.3 cm), narrower petals (0.175 versus 0.25 cm), a bicuspidate ligula (versus bidentate), a column with a more pronounced base, and a half box-like substigmatic appendage (versus semi-conical).
Agrostophyllum gahavisukae is also similar to A. alticola Ormerod, but differs in having longer leaf sheath stipules (0.5 versus 0.02-0.1 cm), a terete ovary (versus triquetrous), narrower petals (0.175 versus 0.25-0.275 cm), a more pronounced column base and a much larger, prominently exserted substigmatic appendage.
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Agrostophyllum gahavisukae
Agrostophyllum gahavisukae Ormerod, drawing by Paul Ormerod, Orchadian 17 (2013) 377, fig., based on the holotype: T.M. Reeve 6353