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Gastrorchis

Gastrorchis humblotii plate
Gastrorchis humblotii plate from
Lindenia Iconographie des Orchidées

Scientific Classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Asparagales
Family:Orchidaceae
Subfamily: Epidendroideae
Tribe: Arethuseae
SubTribe: Bletiinae
Alliance:
Genus: Gastrorchis
Thoaurs 1809
Type Species
Gastrorchis tuberculosa


Gastrorchis is a genus of large, mostly terrestrial orchids (family Orchidaceae). The genus has about 8 species and is abbreviated as Gs. in horticultural trade.

Distribution[]

These species are found in tropical Africa and Madagascar.

Description[]

The species in this genus are very similar and have been classified as Phaius species. The plants differ by being smaller in size, less robust and having a different floral structure

Culture[]

Plants require shade around 1000 to 2500 footcandles and intermediate to warm temperature requirements depending on the species. Plants should be potted in a mix that retain some moisture such as 40% fir bark, 30% sphagnum moss, and 30% soil. Medium should be kept moist during growing season. When growth matures with hold watering for 3 to 4 weeks. Repotting should be done after flowering. . New plants can be obtained from the old spikes by laying the spike out in sand and half covering it.

Naming[]

The genus is named after the Greek words "gaster" (stomach or belly) and "orchis" (orchid) in reference to the sack-like lip base.

Synonyms[]

  1. Gastrorkis Schltr.,1924
  2. Gastorchis misspelling

Species[]

  • Gastrorchis francoisii Schltr., 1924.
  • Gastrorchis geffrayi (Bosser) Senghas, 1984.
  • Gastrorchis humblotii (Rchb.f.) Schltr., 1924.
    • Gastrorchis humblotii var. humblotii.
    • Gastrorchis humblotii var. rubra (Bosser) Bosser & P.J.Cribb in D.J.Du Puy & al., 1999.
    • Gastrorchis humblotii var. schlechteri (H.Perrier) Senghas ex Bosser & P.J.Cribb in D.J.Du Puy & al., 1999.
  • Gastrorchis lutea (Ursch & Toill.-Gen. ex Bosser) Senghas, 1984.
  • Gastrorchis peyrotii (Bosser) Senghas, 1984.
  • Gastrorchis pulchra Humbert & H.Perrier, Mém. Inst. Sci. Madagascar, 1955.
    • Gastrorchis pulchra var. perrieri (Bosser) Bosser & P.J.Cribb in D.J.Du Puy & al.,1999.
    • Gastrorchis pulchra var. pulchra
  • Gastrorchis simulans (Rolfe) Schltr., 1924.
  • Gastrorchis tuberculosa (Thouars) Schltr., 1924.

89.97.179.118 12:26, March 21, 2012 (UTC)

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