Zeuxine Lindl.

Genus

Angiosperms > Asparagales > Orchidaceae

Characteristics

Herbs, terrestrial or rarely lithophytic. Rhizome usually elongate, creeping, fleshy, several noded; roots emerging from rhizome nodes, cylindric, stout. Stem erect or ascending, terete, leafy, glabrous. Leaves cauline or subrosulate, withered or pendulous at anthesis in some species, adaxially green to blackish, sometimes with a white stripe along midvein, linear-lanceolate, obliquely ovate-lanceolate, or elliptic, with or without a petiole-like base sheathing stem, sometimes slightly fleshy. Inflorescence glabrous or pubescent, with a few crowded to scattered sheathing bracts and a few to many flowers in a short to elongate terminal raceme; floral bracts usually equal in length to pedicel and ovary. Flowers resupinate or occasionally erect, small, not opening widely; ovary twisted, glabrous or pubescent. Sepals free, similar, outer surface glabrous to pubescent; dorsal sepal concave, forming a hood with petals; lateral sepals enclosing base of lip. Petals connivent with dorsal sepal, nearly as long as dorsal sepal though usually narrower; lip usually adnate to column margin at base, 2-or 3-partite or rarely entire; hypochile concave-saccate to cymbiform, containing 1 to a few scalelike, subulate or lamellate calli on each side at base; mesochile (when present) short, margin often involute and forming a tube, externally glabrous or pubescent and sometimes with a lamellate flange on each side; epichile dilated, entire to 2-lobed. Column short, dilated, with or without a pair of lateral wings; anther ovoid, 2-locular; pollinia 2, each longitudinally parted, granular-farinaceous, sectile, attached either directly to viscidium or via a short tegula; viscidium ligulate-lanceolate to ovate; rostellum conspicuous, erect, bifid; stigma lobes separate, convex, lateral or at apical corners of column. Capsule erect.
More
Herbs, terrestrial, sympodial. Roots fleshy, villous. Stems succulent, glabrous. Leaves cauline, sessile [petiolate], not articulate; blade convolute, conduplicate, often membranous. Inflorescences terminal, dense spikes [racemes]; flowers spirally arranged; floral bracts mostly longer than flowers, membranaceous, scarious. Flowers few–many, resupinate, white with yellow lip, small, scarcely opening; sepals subequal; dorsal sepal erect, connivent with petals, forming hood over column; lateral sepals distinct and free, enclosing base of lip; lip pandurate, broadly rounded, margins entire, apex slightly broadened to winglike; column short; anther abaxial, 2-chambered, membranous; pollinia 2, sometimes 2-lobed, pyriform, sectile, caudicles present or absent; stigmas 2, on either side of column, convex; rostellum large, deeply divided. Fruits capsules, erect, ovoid [subglobose].
Terrestrial herbs, with long creeping rhizomes and erect leafy stems. Leaves sessile or petiolate, linear or ovate, with broad sheathing bases. Inflorescence terminal; scape with few sheaths; raceme long and slender with many small flowers, or short with fewer larger flowers. Flowers hardly opening. Petals connivent with dorsal sepal to form a hood; lateral sepals enclosing base of lip. Lip saccate at the base with 2 calli; mid-lobe shortly clawed or sessile, entire or bilobed. Column very short, with or without wings in front; 2 lateral stigmatic lobes; rostellum deeply divided; pollinia pyriform, with caudicle attached by an oblong viscidium to the rostellum.
Small, deciduous, shade-loving terrestrial orchids with creeping, above-ground stems. Leaves petiolate, relatively narrow, thin-textured, dark green, in loose basal rosette. Inflorescence terminal on stem, spicate, hairy, wiry or fleshy. Flowers resupinate, small, hairy or glabrous, dull-coloured, often short-lasting. Dorsal sepal concave, overlapping petals to form a hood. Lateral sepals free, flanking labellum base. Petals asymmetrical. Labellum with basal, pouch-like hypochil containing 1 to 3 stalkless glands, epichil bilobed, lobes spreading apart. Pollinia 2, attached to viscidium via short caudicles.
Rostellum deeply divided; pollinia pyriform, the caudicle attached to the rostellum by an oblong viscidium.
Petals adnate to the dorsal sepal and forming a hood with it; lateral sepals enclosing the base of the lip.
Inflorescence a terminal raceme; flowers small or very small, not opening widely.
Column very short, sometimes winged in front, with 2 lateral stigma lobes.
Terrestrial herb with creeping rhizomes and erect leafy stems.
Lip saccate at the base with 2 calli.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) -
Root system creeping-root rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

These orchids grow in shady, humid forests, particularly rainforest.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Zeuxine unspecified picture

Distribution

Zeuxine world distribution map, present in Afghanistan, Angola, Åland Islands, Andorra, Australia, Benin, Bangladesh, Bahamas, Bermuda, Botswana, Central African Republic, China, Congo, Cuba, Ethiopia, Fiji, Gabon, Georgia, Ghana, Guinea, Indonesia, Iran (Islamic Republic of), Jamaica, Japan, Kenya, Lao People's Democratic Republic, Liberia, Moldova (Republic of), Madagascar, Myanmar, Nigeria, Nepal, Pakistan, Philippines, Puerto Rico, Saudi Arabia, Solomon Islands, Sierra Leone, Thailand, Turkmenistan, Tonga, Taiwan, Province of China, Tanzania, United Republic of, Uganda, United States of America, Uzbekistan, Viet Nam, Vanuatu, Samoa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:325743-2
WFO ID wfo-4000041206
COL ID 8W4T9
BDTFX ID -
INPN ID 672814
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Zeuxine Adenostylis Haplochilus Zeuxinella

Lower taxons

Zeuxine gracilis Zeuxine amboinensis Zeuxine bifalcifera Zeuxine clandestina Zeuxine elatior Zeuxine elmeri Zeuxine elongata Zeuxine erimae Zeuxine exilis Zeuxine flava Zeuxine fritzii Zeuxine goodyeroides Zeuxine baliensis Zeuxine lindleyana Zeuxine longilabris Zeuxine lunulata Zeuxine macrorhyncha Zeuxine madagascariensis Zeuxine marivelensis Zeuxine membranacea Zeuxine nervosa Zeuxine odorata Zeuxine palawensis Zeuxine palustris Zeuxine papillosa Zeuxine parvifolia Zeuxine petakensis Zeuxine plantaginea Zeuxine purpurascens Zeuxine reflexa Zeuxine samoensis Zeuxine stammleri Zeuxine stenophylla Zeuxine strateumatica Zeuxine tenuifolia Zeuxine tjiampeana Zeuxine tonkinensis Zeuxine triangula Zeuxine weberi Zeuxine affinis Zeuxine africana Zeuxine andamanica Zeuxine arisanensis Zeuxine ballii Zeuxine boninensis Zeuxine integrilabella Zeuxine kantokeiensis Zeuxine kutaiensis Zeuxine lancifolia Zeuxine leucoptera Zeuxine montana Zeuxine niijimai Zeuxine oblonga Zeuxine rolfiana Zeuxine rupestris Zeuxine violascens Zeuxine bougainvilleana Zeuxine cordata Zeuxine diversifolia Zeuxine wenzelii Zeuxine amboinensis Zeuxine ovalifolia Zeuxine blatteri Zeuxine ovata Zeuxine leytensis Zeuxine philippinensis Zeuxine viridiflora Zeuxine agyokuana Zeuxine glandulosa Zeuxine reginasilvae Zeuxine vietnamica Zeuxine regia Zeuxine gilgiana Zeuxine gengmanensis Zeuxine mindanaensis Zeuxine chowdheryi