Tropidia connata J.J.Wood & A.L.Lamb (1994: 47) emend. I.Kikuchi & Tsukaya

Kikuchi, Izai Alberto Bruno Sabino & Tsukaya, Hirokazu, 2017, Epitypification with an emended description of Tropidia connata (Orchidaceae, Epidendroideae, Tropidieae), PhytoKeys 80, pp. 77-85 : 80

Tropidia connata J.J.Wood & A.L.Lamb (1994: 47) emend. I.Kikuchi & Tsukaya Figure 1

Type.

MALAYSIA. Borneo: Sabah, Sipitang District, Gunung Lumaku , 27 June 1992, A.Lamb, A.Surat, & H.Lim 1512 (holotype: K!, K000942868) .

Epitype.

INDONESIA. West Kalimantan: Kabupaten Kapuas Hulu, Betung Kerihun National Park, en route from stream to ridge, a branch of Sungai (River) Sibau, 01°13.32'N; 113°06.2433'E, 240 m alt., 31 December 2011, H. Tsukaya, H. Okadada and A. Soejima HT245 (BO, TI), here designated.

Emended description.

Erect, mycoheterotrophic herb. Tubers 2-7 × 0.5-1 cm, dark brown, pubescent. Roots 2-5 mm long, short, occurring at the basal 1-3 nodes of stem. Stem 10-22 cm high, ivory white to creamy colored, wiry, simple or branched, perennial, 1 mm thick, internodes 0.8-2.5 cm long, sparsely ramentaceous, bearing 5-10 ovate, acute, sheath-like leaves apressed to the stem, 3-5 mm long. Inflorescence 5-15 flowered, 1-2 flowers open at a time; rachis 2-9 cm long, creamy white, internodes 4-10 mm, slightly zigzag, sparsely ramentaceous; floral bracts 3-5 mm long, off white tipped brown, triangular, acute to acuminate, with a abscission zone at 1-2 mm from the apex, apex detached at the abscission zone after maturation, base of the bracts forming a sheath enclosing the stem. Flowers 1 cm across, non-resupinate, partially open, white, apex of the lip pale orange to yellow. Pedicel with ovary 3-7 mm long, white, sparsely ramentaceous. Dorsal sepal 5-5.9 × 1.5-1.8 mm, narrowly elliptic, acute, sparsely ramentaceous on the abaxial sides. Lateral sepals connate into a 4-7.4 × 2.5-2.7 mm ovate-elliptic, cymbiform synsepalum, apex minutely bifid. Petals 4.8-6 × 1.5 mm narrowly elliptic, acute and asymmetric with two keels at the adaxial surface. Lip 5-7.6 × 2-2.2 mm with 3 nerves, elliptic, acute, concave, margin minutely erose, curving back to a horizontal position, spur saccate, obtuse, bifid, enclosed by synsepalum, 1.1-4 × 1 mm. Column 3-3.9 × 1.6-1.9 mm, ovate-trullate rostellum margin minutely erose 1.4-1.5 mm long, anther cap rostrate 2.5 mm long, stigma with calli-like protrusions and two fiber-like protrusions on the adaxial side of the column, the fibers 1.1-1.4 mm long. Pollinia 2, granular. Vicidium ellipsoid.

Additional specimens examined.

INDONESIA. West Kalimantan: Kabupaten Kapuas Hulu, Betung Kurihun National Park, Sungai (River) Menyakan , upstream of Sg. Sibau, 01°13.825'N; 113°03.963'E , 331m alt. to 01°13.82167'N; 113°03.9367'E, 331 m alt., 5 January 2011, H. Tsukaya, H. Okada and H. Nagamasu #1040 (BO, TI); Kabupaten Kapuas Hulu, Betung Kerihun National Park , on a ridge the junction of Sungai (River) Sibau and Sungai Minyakan, from 01°12.5567'N; 113°04.35'E , 298 m alt. to 01°12.325'N; 113°04.433'E, 341 m alt., 1 January 2012, H. Tsukaya, H. Okadada and A. Soejima HT250 (BO, TI).

Figures

Figure 1. Drawing of Tropidia connata J. J. Wood & A. L. Lamb. A Gross morphology B Lateral view of unopened flower C Lateral view of the column with lip D Dorsal view of the column E Lip F Anther cap G Pollinia H Lateral view of the column I Dorsal sepal J, K Lateral petal of abaxial (J) and adaxial (K) side. L Lateral sepal M Tuber with basal part of inflorescence with short filamentous roots. Scales 3 cm (A), 3 mm (B, C, I-K), 1 mm (D-H), 5 mm (M). Drawing by Ms. Mutsuko Nakajima based on the specimen HT 245.