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Glomera mayuensis

Glomera mayuensis

Glomera mayuensis Ormerod, Orchadian 16 (2009) 228, fig.

Type: LAE 55592 (P.F. Stevens & J.E. Veldkamp) (holo K; iso A, BRI, LAE).

Epiphytic or terrestrial herb forming large patches, to 40 cm tall. Roots, rhizome and lower part of stem not seen. Stems erect, subterete, slightly compressed, producing new stems below the old flower head near the stem apex, 5-8 leaved, longest complete stem 11-12 by 0.4-0.8 cm. Leaves ligulate-lanceolate, thinly coriaceous, 8.5-16.0 by 1.3-1.7 cm; leaf sheaths tubular, truncate opposite leaf axil, smooth, in dried state sometimes weakly striate and slightly wrinkled, exposed part 1.5-2.1 cm long; apex inequally subacutely bilobed. Inflorescence a terminal, semiglobose, densely many- flowered capitulum 2.5-3.0 cm wide; floral bracts thin, oblanceolate-rhombic, 1.3 by 0.5 cm wide, with acute apex, lacking a midnerve. Pedicel and ovary subcylindric clavate, 0.95 cm long. Median sepal narrowly elliptic, 0.78 by 0.29 cm; apex acute. Lateral sepals fused in a broadly elliptic, inequally bilobed synsepalum 0.7 by 0.5 cm, its basal third with inner margins free and loosely enveloping the spur, upper 2/3 connate, each obliquely oblong- elliptic, 0.7 by 0.25 cm; apex subacute. Petals oblong-ligulate, 0.72 by 0.19-2 cm; apex acute. Lip spurred, entire, joined to apex of ovary and margins of column for c. 0.2 cm; spur saccate, obtuse, ca. 0.05 cm long; epichile ovate-elliptic, 0.25 by 0.22 cm, with obtuse apex, veins 5, low lamellate. Column semiterete, 0.275 cm long; arms triangular.
(After Ormerod, 2009)

Leaves midgreen to dark shiny green above, paler and duller below. Flowers white with an orange-yellow labellum.

Montane Araucaria forest on steep slope, also in mixed montane forest. Altitude 1775-2010 m.

Malesia (New Guinea, endemic)

Papua New Guinea (Milne Bay Province)

Cool growing epiphyte.


  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Arethuseae
  • Subtribe Coelogyninae
  • Genus Glomera
  • Section Glomera
  • Species Glomera mayuensis

Glomera mayuensis differs from the similar G. palustris J.J.Sm. in the leaf sheaths being truncate opposite the leaf axil (not U- or V-shaped), slightly smaller lip epichile (0.25 by 0.22 versus 0.3-0.35 by 0.3 -0.35 cm) and triangular (not ligulate) column arms.
Glomera mayuensis is similar to to G. bougainvileana Ormerod in leaf length and in having truncate leaf sheaths, but differs in the longer stems (to 150 versus 40 cm), distinctly striate, transversely wrinkled leaf sheaths (against smooth, at most weakly striate) and a longer column (0.33versus 0.275 cm).
Glomera emarginata Kores from Fiji differs from G. mayuensis in having longer stems (to 90 vs. 40 cm), fleshier leaves, striate (not smooth, at most weakly striate) leaf sheaths and a shorter (2.00 vs. 2.75 mm) column.

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Glomera mayuensis

Glomera mayuensis Ormerod. Drawing by Paul Ormerod in Orchadian 16 (2009) 228, fig., based on the type: LAE 55592 (P.F. Stevens & J.E. Veldkamp).