Prasophyllum viretrum D.L.Jones & D.T.Rouse

New Taxa Austral. Orch. (Austral. Orchid Res.) 5: 155 (2006) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

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

Flowering stem 20–40 cm tall. Leaf-blade to 30 cm long, 2–3 mm diam. at base, dark green, apex lax, often withered at flowering. Flowers 12–35, fragrant, greenish brown to brownish, sessile in a moderately dense to dense spike 8–15 cm long; ovary obovoid, 5–6 mm long, green; sepals 7–9 mm long, dorsal sepal ovate-lanceolate, deflexed, lateral sepals free, linear-lanceolate, widely divergent, recurved distally; petals 6–7 mm long, linear-lanceolate, porrect or spreading, blunt. Labellum ovate, 6.5–7.5 mm long, white or pinkish, recurved at right angles just above the middle, margins crenulate to crispate; apex apiculate; callus plate much-raised, broad, extending three-quarters of way to labellum apex. Column appendages oblong, c. 3 mm long, truncate. Flowers Oct.–Dec.

VVP. Restricted to a few sites in south-western Victoria growing in moist to wet grassland on dark basaltic loam.

Similar in appearance to Prasophyllum frenchii, but with more widely opening flowers and different structure of the labellum callus.

Prasophyllum viretrum is known from only 4 or 5 small populations.

Created by: Jeff Jeanes, 2015-03-26
Updated by: Val Stajsic, 2018-02-15
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Prasophyllum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Prasophyllum viretrum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Prasophyllum viretrum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native

State distribution

Distribution map