Prev Taxon: Genus Ceratostylis
Current Genus: Genus Ceratostylis section Ceratostylis
Next Taxon: Genus Ceratostylis section Pleuranthemum
Ceratostylis longifolia J.J.Sm., Bull. Dép. Agric. Indes Néerl. 39 (1910) 6
Type: Römer, von 1291 (holo BO; iso L)
Synonyms:
Stems elongated, terete, 21.5-23.5 cm long. Leaf elongated, linear, apex conduplicate, acute, above on either side of the grooved mid-rib convex, 16.5-17.5 cm long, 1-1.1 cm wide. Inflorescences fascicled, many-flowered, peduncle short, 1-flowered, pilose, 0.2-0.28 cm long. Floral bracts rather large, at the base funnel-shaped, ventricose, acutely conical-acuminate, 0.45 cm long. Flowers medium-sized, 0.95 cm long. Sepals in the basal part parallel, at the base sparsely pilose outside. Median sepal in the middle recurved, oblong, obtuse, 3-nerved, 0.45 cm long, 0.2 cm wide. Lateral sepals obliquely triangular, obtuse, 3-nerved, 0.43 cm long, to the apex of the mentum 0.88 cm long, 0.2 cm wide with a narrow basal part which is slightly longer than the column-foot, decurrent on the column-foot; mentum pointing backwards, straight, gradually clavate-inflated, obtuse, dorsally near the apex with a longitudinal concavity, 0.5 cm long, at the apex 0.15 cm wide. Petals narrowly rhomboid, acute, 1-nerved, 0.4 cm long, 0.16 cm wide. Lip spathulate, 0.825 cm long, claw linear, inside with 2 puberulous ribs, at the base slightly extended beyond the point of attachment, truncate-retuse, blade concave, indistinctly 3-lobed, 0.25 cm wide, lateral lobes erect, rounded, mid-lobe ovate, strongly thickened, broadly obtuse, convex on either side, inside at the base with a decurrent rib, longitudinally grooved below, 0.2 cm long, 0.1 75 cm wide. Column short, bipartite, 0.2 cm long, arms broad, broadly obtuse. Anther cucullate, apex truncate-obtuse, 0.08 cm wide. Column-foot, pointing backwards, straight, linear, 0.4 cm long. Ovary and pedicel pubescent, 0.5 cm long. (After Smith, 1911)
Flower violet.
Epiphyte in upper montane forest. Altitude 3200 m.
Malesia (New Guinea, endemic).
Cool growing epiphyte.
July, December.
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