Lady Susan's orchid (Pecteilis susannae)

Susanna's egret flower or Lady Susan's orchid (Pecteilis susannae) is a plant species in the Orchidaceae, a large to giant terrestrial orchid, growing upright, white flowers and large in karst to limestone landscapes and flowering December-January.

P. susannae has an erect, thick, leafy stem with a basal sheath and is oval in shape with a pointed tip and has no stalk.

Large flowers, stalks and ovaries 4-6 cm, shallow wings and hairless. Dorsal sepals erect, ovate to globose, 2.5-3 x 2-2.8 cm, blunt end rounded.

Lateral sepals spread, broadly ovoid, slightly oblique, 2.5-4 x 1.2-2.2 cm, usually slightly longer than the dorsal sepals and blunt apex.

Calyx linear lance-shaped, 7-12 x 2.5 mm, lip irregularly ovate and 2.5-4.0 x 2.5-4.4 cm. Lateral lobes broad, subflabellate, 1.6-2.2 x 1.8-2.4 cm, entire lateral margin, apical margins frayed torn.

Mid-lobe linear-oblong, 18-30 x 4-6 mm, moderately fleshy and intact. Straight to gradually curved forward, 6-13 cm x 3-5 mm and pointed end.

Kingdom: Plantae
Phylum: Tracheophyta
Subphylum: Angiospermae
Class: Liliopsida
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Orchideae
Subtribe: Orchidinae
Genus: Pecteilis
Species: Pecteilis susannae

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Dlium