Current Genus: Genus Luisia

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Luisia tristis

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., Fl. Brit. Ind. 6 (1890) 25

Synonyms:

  • Epidendrum triste G.Forst., Fl. Ins. Austral. (1786) 60
    - Type: Forster s.n. (lost?)
  • Luisia teretifolia Gaudich. in Freyc., Voy. Uranie, Bot. (1826) 426, t. 37
    - Type: Gaudichaud 37 (holo P, sterile)
  • Cymbidium triste Roxb., Fl. Ind. 3 (1832) 461
    - Type: Calcutta cult. (Egerton) s.n. (Ganges delta) (holo K?)
  • Cymbidium tenuifolium Wight, Icon. Pl. Ind. Or. 5 (1851) t. 911 (not text on p. 11); ibid. 3 (1844-45) t. 911
    - Type: Wight? s.n. (Iyamally Hills, Neilgherries) (holo K)
  • Luisia burmanica Lindl., Folia Orchid. Luisia (1853) 3
    - Type: the plate, Griffith drawing nr. 8 (=Notul. 340 p.p.) (holo K)
  • Luisia zeylanica Lindl., Folia Orchid. Luisia (1853) 3
    - Type: Macrae s.n. (Ceylon) (holo K)
  • Luisia beccarii Rchb.f., Bot. Centralbl. 28 (1886) 344
    - Type: Beccari 10372 (holo FI)
  • Luisia macrocarpa Schltr., Repert. Spec. Nov. Regni Veg. 17 (1921) 382
    - Type: Kempter s.n. (Angriffshafen, Kaiser Wilhelmsland) (holo B, lost)

Basionym: Epidendrum triste

Roots few at the base of the stem, rarely from higher up the stem, very long, 0.1-0.3 cm diam. Stem erect, eventually pendent with ascending tip, not or sparsely branching at the base, up to 100 cm long but usually less, 0.3-0.4 cm diam., 3-6-leaved, tough, almost woody, covered by the leaf-sheaths; internodes 1.2-3.5 cm long. Leaf sheaths as long as or a little shorter than the internodes, fleshy, rough-textured. Leaves terete, sometimes slightly curved, 5-15 by 0.2-0.35 cm, sometimes channelled dorsally, apex sharp pointed. Inflorescences arising laterally near the lowest leaves, racemose, up to 0.8-1 cm long; peduncle very short, peduncle-scales 3, basal; rachis broader than peduncle, 0.3-0.5 cm diam., cylindrical to clavate, 8- to 10-flowered (1-3 opening simultaneously). Floral bracts deltoid, 0.1 cm long, apex acute. Pedicel and ovary 0.6-0.8 cm long, narrowly conical, decurved near the apex. Flowers nodding, 1-1.2 cm diam. Median sepal suberect, cucullate, oblong-elliptic, 0.6 cm long, apex obtuse. Lateral sepals ovate, not wide-spreading, 0.8 cm long, with inrolled margins, concave, mid-rib prominent outside, apex apiculate. Petals ringent, oblong-subspathulate, 0.9 cm long. Lip 3-lobed at the base, 0.7 by 0.6 cm, fleshy, inside densely covered with minute brown hairs; hypochile oblong at the base, lateral lobes small, erect, triangular; epichile cordate, 0.4 by 0.6 cm, obtuse. Column stout, 0.4 cm long. Anther transversely elliptic. Fruit linear in outline, sharply 3-angled with a flat keel on each side, 5-6 cm by 0.5 cm. (After O'Byrne, 1994)


Sepals and petals green to yellow green, lip velvety dark maroon.

Epiphyte in lowland and montane forest, old plantations and on solitary trees; 0-1700 m.

Malesia (New Guinea), tropical Asia, Australia, New Caledonia, east to Samoa.

Papua (Indonesia); Papua New Guinea. See map

distribution in New Guinea

Warm to intermediate growing epiphyte, requires light position.

January, April, May, June, July, August, September, October, December.

  • Smith, J.J., Orchid. Java (1905) 545, as Luisia teretifolia Gaudich.
  • Smith, J.J., Orchid. Java, Fig.-Atl. (1912) fig. 413, as Luisia teretifolia Gaudich.
  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 970, as Luisia beccarii Rchb.f.
  • Smith, J.J., Nova Guinea 12, 4 (1916) 459, as Luisia cf. beccarii Rchb.f.
  • Dockrill, A. W., Austral. Indig. Orchids 1 (1969) 674, fig., as Luisia teretifolia Gaudich.
  • O'Byrne, P., Lowland Orchid. Papua New Guinea (1994) 504, fig., pl., as Luisia teretifolia Gaudich.
  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Vandeae
  • Subtribe Aeridinae
  • Genus Luisia
  • Species Luisia tristis

O'Byrne (1994: 506) reports a deviating form which may represent a different taxon. A quite different species was recently collected by Howcroft (pers. comm.) on New Britain, which appears to be very similar to Luisia curtisii Seidenf. This has petals which are much longer than the sepals.


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Luisia tristis

overview picture

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., plant habit, photo E.F. de Vogel, Leiden cult. 20031986

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., stem with inflorescence, photo E.F. de Vogel, Leiden cult. 20031986

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., inflorescence, photo E.F. de Vogel, Leiden cult. 20031986

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., flower, oblique front view, photo E.F. de Vogel, Leiden cult. 20031986

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., aerial root, photo E.F. de Vogel, Leiden cult. 20031986

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., inflorescences, photo P.J. Cribb, from Papua (Indonesia), Baliem Valley

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., plant with inflorescence, photo John Cara, based on Cara cult. s.n.

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., inflorescence, photo John Cara, based on Cara cult. s.n.

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., flower, front view, photo John Cara, based on Cara cult. s.n.

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., plant in situ, photo Graham Corbin, from Western Highlands Prov.,m Mount Hagen

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., flower, photo Graham Corbin, from Western Highlands Prov.,m Mount Hagen Image

Luisia tristis

Luisia teretifolia Gaudich., drawing N.H.S. Howcroft 21, from PNG, Markham Valley

Luisia tristis

Luisia tristis (G.Forst.) Hook.f., drawing P. O'Byrne in Lowland Orchids of New Guinea (1994) 505, as Luisia teretifolia Gaudich.

Luisia tristis

Luisia beccarii Rchb.f., floral analysis, drawing J.J. Smith, based on Gjellerup 595

Luisia tristis

Luisia beccarii Rchb.f., floral analysis, drawing J.J. Smith, based on Gjellerup 595