Gastrorchis humblotii (Rchb.f.) Schltr.

"Phaius humblotii (Rchb.f.) Schltr. is native to Madagascar and in Comoros. This species grows in moist forests, partially deciduous, at an altitude of 1100-2100 m "

Gastrorchis humblotii Schltr., Repert. Spec. Nov. Regni Veg. Beih. 33: 169 (1924).

Gastrorchis humblotii (Rchb.f.) Schltr.; Photo Dieter Weise

Synonym:

Gastrorchis humblotii var. humblotii

Phaius humblotii Rchb.f.

Description:

Plants 45-80 cm tall, pseudobulbs with 2-4 petiolate leaves (petiole 13-20 mm) elliptical-lanceolate or oval lanceolate (25-40 x 6-10 cm), plicate-veined, acute and attenuate toward both ends. Scape 60- 90 cm tall; cluster loosely 12-15 flowered: bracts herbaceous, green, narrow, lanceolate, obtuse and with the veins less numerous, generally slightly longer than the pedicel. Sepals red, oval (3-3.2 cm x 2 cm), shortly, apiculate. Petals similar, but smaller (2.5-2.8 x 1.5-1.8 cm). Labellum (3 x 3 cm) lateral lobes thick and clear red; median deeper, slightly longer than wide, larger than the 2 laterals together: with a large number of hairs at the base of the labellum: V shaped callus 8 mm tall elongated in front by a single flat keel. Column curved, 2.2cm long. Rostellum longer than wide on top. Anther bearing several hairs, basally, elongated in front by an attenuate then truncate rostrum. Pedicel 3-3.2 cm long.

Distribution:

Madagascar and the Comoros Islands.

Ecological:

At altitudes of 1100 to 2100 m.

Refs:

orchidspecies.com

travaldo.blogspot.com

theplantlist.org

ipni.org