Prasophyllum chasmogamum R.J.Bates & D.L.Jones

New Taxa Austral. Orchid. (Austral. Orchid Res. 2) 77 (1991) 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 slender to stout, 30–55 cm tall. Leaf-blade 10–25 cm long, 3–6 mm diam. at base, apex suberect, senescent at flowering time. Flowers 15–30, greenish brown to reddish brown, pink or white, fragrant, in a moderately crowded spike 7–20 cm long; ovary obovoid, 4–5 mm long; sepals 8–11 mm long, dorsal sepal ovate-lanceolate, lateral sepals free or fused only at base, linear-lanceolate, recurved, parallel; petals linear-lanceolate, 9–11 mm long. Labellum subsessile, porrect, 7–9 mm long, recurved at about right angles near middle, lamina usually pink or white, margins entire; callus plate prominently raised, channelled, greenish, broad at base then tapered, extending almost to the labellum apex. Column appendages oblong, c. 2 mm long. Flowers Oct.–Nov.

EGL, EGU, GipP, HSF, NIS, VVP. Endemic to Victoria where found in seasonally wet grasslands and grassy woodlands on heavy clay loams.

This taxon was formerly included in Prasophyllum pyriforme, but that species has fused lateral sepals, slightly later flowering period and favours drier forest habitats.

Created by: Jeff Jeanes, 2015-04-07
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 chasmogamum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Prasophyllum chasmogamum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Gippsland Plain present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native

State distribution

Distribution map