Grosourdya Rchb.f.

This genus is accepted, and its native range is Hainan to Indo-China and Malesia.

General Description

Epiphytic herbs. Stem enclosed in basal leaf-sheaths. Leaves 1–6, basal, distichous, flat, narrowly oblong to lanceolate, twisted at base so as to lie in one plane, apex often unequally bilobed, articulate and short-sheathing at base. Inflorescences lateral, usually shorter than leaves, often many borne simultaneously on a plant, usually erect; peduncle longer than rachis, both usually pricklyhairy, with 1–6 flowers open at a time; floral bracts persistent. Flowers resupinate, 0.5–1.5 cm across, ephemeral, opening successively, widely opening. Sepals and petals free, similar, spreading. Petals narrower than sepals. Labellum motile on column foot or rigidly attached to base of column, usually trilobed, spurred, side lobes narrow, erect, midlobe often replicate on spur, sometimes with two basal lobules on both sides, with a median tooth, giving a ‘four-lobed’ appearance; spur prominent, usually spreading at open end, rarely pendent. Column bent forward at an obtuse angle at base of stigma, as long as or longer than column foot, or foot absent; pollinia two, waxy, subglobular to ovoid, entire, or rarely four and the pollinia then completely split into two unequal bodies, each of the pollinia often attached to stipe by an auriculate caudicle, stipe cuneate or narrowly triangular-cuneate to spatulate, viscidium triangular or ovate; rostellum beaked.


The 12 species of Grosourdya are collectively distributed from the Andaman Islands, Burma, Thailand, and Indochina to Malaysia, Indonesia, and the Philippines.


All species of Grosourdya are epiphytes from 0 to 1600 m. Grosourdya appendiculata (Blume) Rchb.f. is recorded as epiphytic on tree trunks in broad-leaved evergreen forest in China, on cultivated fruit trees near sea level in Thailand, and as a common twig epiphyte in Sumatra (Comber 2001) and also in Java (Comber 1990). Grosourdya bicornuta J.J.Wood & A.L.Lamb is recorded from forests at c. 1300 m in Sabah. Grosourdya incurvicalcar (J.J.Sm.) Garay is epiphytic on branches of small trees such as Diospyros L. (Ebenaceae) at c. 30 m in Peninsular Malaysia. Grosourdya quinquelobata (Schltr.) Garay is reported from remnant riverine forests at 800–900 m in Sulawesi. Grosourdya tripercus (Ames) Garay is known from forests at sea level in the Philippines.


No uses have been reported for Grosourdya; it is uncommon in cultivation.

Native to:

Andaman Is., Borneo, Hainan, Jawa, Lesser Sunda Is., Malaya, Maluku, Myanmar, Philippines, Sulawesi, Sumatera, Thailand, Vietnam

Grosourdya Rchb.f. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Kiew, R. [RK 4658], Malaysia 61728.000

First published in Bot. Zeitung (Berlin) 22: 297 (1864)

Accepted by

  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Pridgeon, A.M., Cribb, P.J., Chase, M.C. & Rasmussen, F.N. (2014). Genera Orchidacearum 6: 1-544. Oxford University Press, New York, Oxford.

  • Aeridinae:

    All Rights Reserved

  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.