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Dienia Lindl.

Sub family: Epidendroideae     
Tribe: Malaxideae
Derivation of name: dienos two year referring to belief that flowering is alternate year
Salient Features: 

  • Terrestrial herbs Rarely epiphytic

  • Roots hairy Stem cylindrical, fleshy often creeping , rooting at nodes

  • Leaves two to several thin textured, pleated, petiole sheathing at the base

  • Inflorescence Apical erect unbranched racemose

  • Bracts Setose to lanceolate, persistent

  • Flowers non resupinate or resupinate, green brown, yellow, pink or purple; dorsal sepal spreading free, lateral sepals spreading free or fused; petals narrower than sepals, spreading, free

  • Labellum parallel to column, sometimes concave at the base, entire to lobed. lacking auricles at the base, apocal margin entire or toothed, lacking spur, callus absent, cushion like or obscurely transversely ribbed

  • Column lacking foot, anther dorsal attached to broad filament, opening ventrally, pollinia 4 in pairs, waxy, clavate, stigma semicircular or transversely elliptical; rostellum obtuse at apex

Dienia ophrydis (J.Koenig) Seidenf.

In Contr. Orchid Fl. Thailand 13: 18 (1997)

  • Crepidium ophrydis (J.Koenig) M.A.Clem. & D.L.Jones in Lasianthera 1: 38 (1996)

  • Dienia montana (Blume) M.A.Clem. & D.L.Jones in Lasianthera 1: 41 (1996), nom. superfl.

  • Epidendrum ophrydis J.Koenig in A.J.Retzius, Observ. Bot. 6: 46 (1791)

  • Gastroglottis montana Blume in Bijdr. Fl. Ned. Ind.: 397 (1825), nom. superfl.

  • Gastroglottis ophrydis (J.Koenig) A.N.Rao in Bull. Arunachal Forest Res. 26: 103 (2010)

  • Malaxis ophrydis (J.Koenig) Ormerod in G.Seidenfaden, Descr. Epidendrorum J.G.König: 18 (1995)

  • Anaphora liparioides Gagnep. in Bull. Mus. Natl. Hist. Nat., sér. 2, 4: 592 (1932)

  • Corymborkis latifolia (Sm.) M.R.Almeida in Fl. Maharashtra 5A: 30 (2009)

  • Dienia congesta Lindl. in Bot. Reg. 10: t. 825 (1824)

  • Dienia curranii (Ames) M.A.Clem. & D.L.Jones in Lasianthera 1: 41 (1996)

  • Dienia fusca Lindl. in Gen. Sp. Orchid. Pl.: 22 (1830)

  • Dienia latifolia (Sm.) M.A.Clem. & D.L.Jones in Lasianthera 1: 41 (1996)

  • Dienia volkensii (Schltr.) M.A.Clem. & D.L.Jones in Lasianthera 1: 42 (1996)

  • Gastroglottis latifolia (Sm.) Szlach. in Fragm. Florist. Geobot., Suppl. 3: 123 (1995)

  • Glossochilopsis carnosula (Rolfe ex Downie) Szlach. & Marg. in Polish Bot. J. 46: 114 (2001)

  • Gyrostachys plantaginea (Spreng.) Kuntze in Revis. Gen. Pl. 2: 664 (1891)

  • Liparis bernaysii (F.Muell.) F.M.Bailey in Syn. Queensl. Fl.: 508 (1883)

  • Liparis krempfii Gagnep. in Bull. Soc. Bot. France 76: 514 (1929)

  • Liparis turfosa Gagnep. in Bull. Soc. Bot. France 76: 515 (1929)

  • Malaxis carnosula (Rolfe ex Downie) Seidenf. & Smitinand in Orch. Thail. (Prelim. List): 146 (1959)

  • Malaxis congesta (Lindl.) Deb in Bull. Bot. Surv. India 3: 128 (1961 publ. 1962)

  • Malaxis curranii Ames in Philipp. J. Sci., C 6: 44 (1911)

  • Malaxis kizanensis (Masam.) S.Y.Hu in Quart. J. Taiwan Mus. 27: 433 (1974)

  • Malaxis latifolia Sm. in A.Rees, Cycl. 22: n.° 3 (1812)

  • Malaxis latifolia var. nana S.S.Ying in Mem. Coll. Agric. Natl. Taiwan Univ. 25: 101 (1985)

  • Malaxis parvissima S.Y.Hu & Barretto in Chung Chi J. 13: 22 (1976)

  • Malaxis plicata Roxb. in Fl. Ind., ed. 1832. 3: 456 (1832

  • Malaxis vietnamensis T.B.Nguyen & D.H.Duong in T.B.Nguyen (ed.), Fl. Taynguyen. Enum.: 202 (1984)

  • Malaxis volkensii (Schltr.) Fosberg & Sachet in Micronesica 20: 143 (1987)

  • Microstylis bernaysii F.Muell. in Fragm. 11: 21 (1878)

  • Microstylis carnosula Rolfe ex Downie in Bull. Misc. Inform. Kew 1925: 368 (1925)

  • Microstylis congesta (Lindl.) Rchb.f. in W.G.Walpers, Ann. Bot. Syst. 6: 206 (1861)

  • Microstylis dalatensis Guillaumin in Bull. Mus. Natl. Hist. Nat., sér. 2, 27: 397 (1955)

  • Microstylis fusca (Lindl.) Rchb.f. in W.G.Walpers, Ann. Bot. Syst. 6: 207 (1861)

  • Microstylis ishigakensis Ohwi in J. Jap. Bot. 13: 439 (1937)

  • Microstylis kizanensis Masam. in Rep. (Annual) Taihoku Bot. Gard. 3: 75 (1933)

  • Microstylis latifolia (Sm.) J.J.Sm. in Orch. Java: 248 (1905)

  • Microstylis trilobulata Kurz ex N.E.Br. in Gard. Chron., n.s., 18: 393 (1882)

  • Microstylis volkensii Schltr. in Bot. Jahrb. Syst. 56: 458 (1921)

  • Neottia plantaginea D.Don in Prodr. Fl. Nepal.: 27 (1825), nom. illeg.

  • Spiranthes plantaginea Spreng. in Syst. Veg., ed. 16. 3: 708 (1826)

Ecology Plants terrestrial, herb growing on moist soil near stream on laterite soil under dense undergrowth, in cool places, in evergreen forest.
Pseudobulbs cylindric, 1-2 cm, fleshy, with several nodes, ± enclosed in membranous sheaths. Leaves 4 or 5, obliquely ovate-elliptic, ovate, or narrowly elliptic-lanceolate, 7-16(-25) × (2.5-)4-9 cm, base contracted into a sheathlike, amplexicaul petiole 3-5 cm, apex acuminate.

Inflorescence erect; peduncle erect, 15-60 cm, very narrowly winged; rachis 5-15(-25) cm, many flowered; floral bracts ± reflexed, narrowly lanceolate, 2.5-5(-12) mm.

Flowers purplish red to greenish yellow, relatively small; pedicel and ovary 2-3 mm.

Dorsal sepal narrowly oblong, 3-3.5 × 1.1-1.2 mm, apex obtuse; lateral sepals obliquely ovate, 2-2.5 × 1.2-1.4 mm. Petals linear, 2.5-3.2 × ca. 0.7 mm, apex obtuse;
Lip broadly ovate, ca. 2 × 2.5 mm, concave, subcordate to truncate at base, apex 3-lobed; mid-lobe narrowly ovate, 0.7-1.1 mm, much longer than lateral lobes, apex obtuse. 

Column  1.2 mm, stout. 
Capsule erect, obovoid-ellipsoid, 6-7 × 3-4 mm; fruiting pedicel 2-3 mm.

 
Flowering June July                              
Fruiting Aug-Dec. 

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