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Platanthera chlorantha (Custer) Rchb., 1828

Platanthera chlorantha.jpg <b><i>Platanthera chlorantha</i></b> (Custer) Rchb., 1828||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310200834-f78c70ec-th.jpg>Thumbnails<b><i>Orchis anatolica</i></b> Boiss., 1844 ||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310194231-6511a201-th.jpg><b><i>Platanthera chlorantha</i></b> (Custer) Rchb., 1828||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310200834-f78c70ec-th.jpg>Thumbnails<b><i>Orchis anatolica</i></b> Boiss., 1844 ||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310194231-6511a201-th.jpg><b><i>Platanthera chlorantha</i></b> (Custer) Rchb., 1828||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310200834-f78c70ec-th.jpg>Thumbnails<b><i>Orchis anatolica</i></b> Boiss., 1844 ||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310194231-6511a201-th.jpg><b><i>Platanthera chlorantha</i></b> (Custer) Rchb., 1828||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310200834-f78c70ec-th.jpg>Thumbnails<b><i>Orchis anatolica</i></b> Boiss., 1844 ||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310194231-6511a201-th.jpg><b><i>Platanthera chlorantha</i></b> (Custer) Rchb., 1828||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310200834-f78c70ec-th.jpg>Thumbnails<b><i>Orchis anatolica</i></b> Boiss., 1844 ||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310194231-6511a201-th.jpg><b><i>Platanthera chlorantha</i></b> (Custer) Rchb., 1828||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310200834-f78c70ec-th.jpg>Thumbnails<b><i>Orchis anatolica</i></b> Boiss., 1844 ||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux/2011/03/10/20110310194231-6511a201-th.jpg>

Platanthera chlorantha (Custer) Rchb., 1828
Common names: Greater Butterfly-orchid [En], Platanthère verdâtre, Platanthère à fleurs vertes, Platanthère à fleurs verdâtres, Orchis des montagnes, Orchis verdâtre [Fr], Bergnachtorchis [Nl], Platantera verdastra [It], Satirión verde [Es].

Ferrières ● Belgium

Etymology: The name Platanthera is derived from Greek, πλατύς [platis], broad et ανθηρός [anthirôs], flourish, meaning "broad anthers", while the species name, chlorantha comes from χλωρός [chloros], and ανθός [anthos], flower.

Description: Robust plant, 20-60 cm tall, with two large, elliptical, shiny, bluish-green basal leaves and up to five smaller, pointed stem leaves. There are 10-40 white flowers. The ovate, wavy-edged lateral sepals spread outwards and downwards, the smaller upper sepal and two petals forming a broad, semicircular hood. The translucent lip is long and strap-shaped with a greenish tip, the spur at the base being up to 25 mm long, lying right across the flower spike and curving slightly downwards. The two pollinia diverge and are set wide apart at the base of the column, giving a clear view down into the spur. (Lesser Butterfly-orchid or Platanthera bifolia is very similar, but the two pollinia are parallel and lie close together, obscuring the entrance to the spur.) The scent is sweet and strong, particularly at night. The white flowers are highly reflective and show up well in dim light.

Habitat: It is most commonly found on well-drained, calcareous soils, on downland, old pastures, hill hay meadows, woodland such as that on the heavier soils below chalk hills, and occasionally in calcareous sand dunes. It is rarely found on slightly acid moorland.
Flowering period: May to July.

Distribution: It is an Atlantic Mediterranean species, from southern Norway to southern Sicily and to the East to Turkey and Russia.


References:
Delforge P., 2005. Guide des Orchidées d’Europe, d’Afrique du Nord et du Proche-Orient, Les guides du naturalistes, Delachaux et Niestlé.
Britain’s Orchids







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Monday 7 June 2010
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