Gastrodia R.Br.

Potato orchids (en)

Genus

Angiosperms > Asparagales > Orchidaceae

Characteristics

Herbs terrestrial, leafless, holomycotrophic. Rhizomes horizontal, tuberous, cylindric, sometimes slightly coralloid, slightly fleshy, usually densely noded. Inflorescence erect, terminal, noded below middle, nodes with tubular or scalelike sheaths, glabrous, yellowish brown or dull brown, usually few to many flowered, rarely 1-flowered, sometimes elongating in fruit. Flowers spreading or nodding, campanulate, urceolate, or cylindric, resupinate or not, cream-brown, yellowish brown, or dull brown, occasionally greenish brown, lip often lighter brown and sometimes with orange markings; pedicel usually elongating in fruit. Sepals and petals united and forming a perianth tube, only apical portions free; perianth tube sometimes dilated and saccate at base, sometimes with a deep sinus between lateral sepals, outer surface often verrucose; petals much smaller than sepals; lip enclosed within perianth tube, adnate to apex of column foot, usually small, usually clawed at base, simple or 3-lobed; disk with a pair of globose calli at base. Column elongate, with a short but distinct column foot at base, winged toward apex, sometimes with a pair of toothlike projections at apex; anther borne on a filament, large, subterminal, incumbent; pollinia 2, granular-farinaceous, usually composed of friable massulae, without caudicles; stigma raised, shield-shaped. Capsule erect.
More
Raceme of few to many pedicellate fls; floral bracts short, scarious. Per. tubular with 5 fleshy lobes, ± split between the lateral sepals which stand uppermost; tube gibbous beneath labellum; petal lobes small and just within mouth of tube. Labellum included, adnate to gibbous part of tube, its free portion ± oblong with submedian longitudinal calli and undulate margins. Column us. long, very narrowly winged; anther terminal, erect then bending forward, pollen in angular granules; stigma broad, basal, hollow; rostellum represented by flap under anther. Plants terrestrial, non-green; rhizome elongated, sympodially branched, mycorrhizal, bulky and filled with starch, nodes bearing remnants of scale lvs. Lvs represented on erect stem only by short loose sheathing scales. About 15 spp., from Himalayas to Japan and southwards through Malaya to Australasia. One N.Z. sp. shared with Australia, the other 2 endemic and both with short columns.
Leafless terrestrial orchids with rootless, fleshy, elongated rhizomes that sometimes look like a yam or potato. Inflorescence racemose, multiflowered, tip of raceme sometimes nodding. Flower stem fleshy, brown, solid. Peduncle much longer than rachis. Sterile bracts encircling stem, scarious. Pedicels fleshy, obliquely erect. Flowers tubular, completely enclosing labellum and column, suberect to pendulous. Sepals fused along margins, fleshy, often with roughened or verrucose exterior. Petals short, overlapping sepals, tips free. Labellum attached weakly by basal stalk to vestigial column foot. Labellum lamina 3-lobed, with flexible basal claw; lateral lobes broad, with entire to crinkled/crispate margins. Callus consisting of a series of keels or ridges, papillate, often producing granules of yellow, starchy pseudopollen. Capsules erect, often verrucose.
Life form perennial
Growth form herb
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Sexuality hermaphrodite
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Environment

Found in forested habitats and swampy areas, sometimes in peaty soil or in sites of litter accumulation.
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Hardiness (USDA) 8-12

Usage

The fleshy rhizomes of Gastrodia were an important food source for First Nations peoples (Gott 1982).
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Cultivation

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Images

Gastrodia unspecified picture

Distribution

Gastrodia world distribution map, present in Australia, Bangladesh, Chile, China, Indonesia, Japan, Lao People's Democratic Republic, Madagascar, Myanmar, Mozambique, Nepal, New Zealand, Pakistan, Philippines, Korea (Democratic People's Republic of), Réunion, Rwanda, Solomon Islands, Thailand, Taiwan, Province of China, Viet Nam, Vanuatu, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:29530-1
WFO ID wfo-4000015373
COL ID 8VXSF
BDTFX ID -
INPN ID 705367
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Neoclemensia Gastrodia Demorchis

Lower taxons

Gastrodia major Gastrodia similis Gastrodia tonkinensis Gastrodia sabahensis Gastrodia silentvalleyana Gastrodia albida Gastrodia uraiensis Gastrodia flexistyla Gastrodia spatulata Gastrodia wuyishanensis Gastrodia surcula Gastrodia abscondita Gastrodia africana Gastrodia angusta Gastrodia appendiculata Gastrodia arunachalensis Gastrodia boninensis Gastrodia callosa Gastrodia celebica Gastrodia confusa Gastrodia cunninghamii Gastrodia elata Gastrodia entomogama Gastrodia flavilabella Gastrodia fontinalis Gastrodia gracilis Gastrodia grandilabris Gastrodia holttumii Gastrodia lacista Gastrodia menghaiensis Gastrodia minor Gastrodia mishmensis Gastrodia stapfii Gastrodia urceolata Gastrodia verrucosa Gastrodia vescula Gastrodia punctata Gastrodia crassisepala Gastrodia crebriflora Gastrodia crispa Gastrodia dyeriana Gastrodia papuana Gastrodia procera Gastrodia pubilabiata Gastrodia queenslandica Gastrodia shimizuana Gastrodia taiensis Gastrodia tuberculata Gastrodia zeylanica Gastrodia sesamoides Gastrodia takeshimensis Gastrodia damingshanensis Gastrodia phangngaensis Gastrodia huapingensis Gastrodia cajanoae Gastrodia isabelensis Gastrodia solomonensis Gastrodia cooperae Gastrodia kuroshimensis Gastrodia clausa Gastrodia confusoides Gastrodia albidoides Gastrodia tembatensis p.t.ong & p.o'byrne Gastrodia effusa p.t.ong & p.o'byrne Gastrodia flexistyloides Gastrodia nantoensis Gastrodia madagascariensis Gastrodia nipponica Gastrodia javanica Gastrodia falconeri Gastrodia exilis Gastrodia peichatieniana Gastrodia theana Gastrodia longitubularis Gastrodia ballii Gastrodia rwandensis Gastrodia selabintanensis Gastrodia sui Gastrodia fimbriata