Pterostylis ×aenigma D.L.Jones & M.A.Clem.

Muelleria 8: 73 (1993) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:Victoria: endangered (e); listed in Flora and Fauna Guarantee Act 1988

Flowering plant to 30 cm tall. Rosette leaves 4–8, ovate to oblong, 4–6 cm long, 1.5–2 cm wide, more or less sessile, margins flat. Flower solitary, 4–4.5 cm long, semi-nodding, green and white with brownish front and apex; galea apex decurved to flat; dorsal sepal acuminate, exceeding the petals; lateral sepals erect, loosely embracing the galea leaving a lateral gap, sinus deeply v-notched when viewed from the front, barely bulging when viewed from the side, free points linear-tapered to filiform, 2.5–3.5 cm long, erect; petals flared. Labellum narrowly linear-lanceolate, 18–21 mm long, 3.5–4 mm wide, dark brown, apex blunt, tip protruding from the sinus in the set position. Flowers Nov.–Dec.

EGU, HNF, VAlp. Endemic to Victoria where known only from one locality near Omeo, in moist flats along floodplains of small streams in tall open forest, on moisture-retentive clay loam.

This is a natural hybrid between P. cucullata subsp. sylvicola and P. falcata, both of which grow nearby.

Created by: Jeff Jeanes, 2015-06-12
Updated by: Jeff Jeanes, 2015-06-12
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Pterostylis
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Pterostylis ×aenigma in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Pterostylis ×aenigma in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
East Gippsland Uplands present native
Highlands-Northern Fall present native
Victorian Alps present native