Species Information - Tainia trinervis

Tainia trinervis (Blume) Rchb.f., Bonplandia 5 (1857) 54

Type:

Synonyms:

• Mitopetalum trinerve Blume, Mus. Bot. Lugd. Bat. 2 (1856) 185
  - Type: Korthals s.n. (Tandite) (holo L)
• Mitopetalum parviflorum Blume, Fl. Javae, n.s., 1 (1858) 135, pl. 50, f. 2; Coll. Orchid. (1858) 160, t. 5
• Tainia parviflora Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1911) 100
  - Type: Schlechter 20132 (holo B, lost)

Basionym: Mitopetalum trinerve

Stem of sterile shoot with 2-5 internodes, 38-73 mm long, 3-6 mm diam. (herb.). Pseudobulb cylindrical, slightly swollen towards the base, 30-68 by 3-6 mm, scale of subterminal node decaying to somewhat persistent, 70-97 mm long. Petiole 30-135 mm long. Leaf blade elliptic, 9.5-26.7 by 2.9-8.1 cm, index 2.3-7.2, acute; margin not undulate; thin, 33-61-veined (3 thickened). Inflorescence terminal, 28.0-69.6 cm long, 11-25-flowered, arising from the base of the pseudobulb. Peduncle 24-41.5 cm long, 1-4 mm diam. Peduncle scales 3-4, the longest 28-66 mm long. Rachis 8.1-29.6 cm long, 1-3 mm diam. Floral bracts patent to spreading, triangular, 4-11 mm long. Flowers several open simultaneously. Pedicel and ovary 7-18 mm long, as long as to longer than the bracts. Median sepal elliptic to triangular, 9-12.5 by 1.5-2 mm, index 5.5-8.3, obtuse, mid-vein not thickened abaxially. Lateral sepals elliptic to triangular, slightly falcate, 8-11 by 1.5-3 mm, index 3.3-5, obtuse, mid-vein usually not thickened abaxially. Petals obliquely elliptic to triangular, slightly falcate to falcate, 8.5-11 by 1.5-2 mm, index 4.3-7.3, obtuse, mid-vein usually not thickened abaxially. Lip blade three-lobed, in general outline elliptic, 6.5-8 by 5-6.5 mm, index 1.2-1.6; median lobe about triangular to orbicular, 2-3.5 by 4-5 mm, index 0.4-0.8; tip acuminate; margins entire, glabrous, rarely minutely papillose, adaxial surface usually minutely papillose; lateral lobes obliquely triangular, 1-2 mm long; tip acute to slightly obtuse; margins entire, minutely papillose, rarely glabrous; adaxial surface usually minutely papillose; lip adaxially with 3 keels, the median keel 3-7 mm long, starting at 1-5 mm, raised plate-like from the basal part of the lip, abruptly increasing in height distally, forming a disc-like flap, highest distally, crest straight, entire, glabrous, thickened throughout, sometimes doubled distally; the lateral keels 5-7 mm long, starting at 0.5-1.5 mm, raised plate-like from the basal part of the lip, forming a about triangular fleshy callus over c. 1 mm, then decreasing in height, abruptly increasing again on the median lobe, forming a disc-like flap, highest distally, crest straight to slightly undulating proximally, straight distally, entire, glabrous, thickened throughout, sometimes doubled proximally and distally. Column 3.5-5 mm long, stelidia absent; top part truncate to semi-orbicular, margin entire; wings seam-like, extending up to the tip of the column-foot; column-foot 0.5-2 mm long. Anther 1-1.5 by 1-1.5 mm, abaxially with 2 crests; thecae distinctly 2-4-celled. Pollinia 8. Fruit ellipsoid, c. 28 by c. 10 mm; stalk c. 8 mm long. (After Turner, 1992)

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