Pterostylis agrestis (D.L.Jones) G.N.Backh.

Victorian Naturalist 127: 56 (2010) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:Victoria: endangered (e)

Flowering plant 5–12 cm tall, stem leaves 4–6, closely sheathing to spreading. Rosette leaves 5–8, ovate to elliptic, 0.6–2 cm long, 3–8 mm wide, shortly petiolate, crowded, margins entire. Flowers 3–14, 8–10 mm long, translucent green with darker green lines; galea porrect at base, shallowly curved for most of its length, abruptly decurved near the apex; dorsal sepal acute; lateral sepals deflexed, conjoined part broadly ovate in outline when flattened, 5–6 mm long, 6–7 mm wide, margins incurved, concave, free points broadly triangular, c. 3 mm long, spreading; petals asymmetrical, ovate, broadest towards the middle. Labellum green with a greenish black basal appendage; lamina oblong to obovate, 2–2.2 mm long, c. 2 mm wide; appendage c. 2 mm long, c. 1.3 mm wide, 3-ridged, central ridge hardly higher than marginal ridges. Flowers Sep.–Oct.

CVU, Gold, VVP. Endemic to Victoria where confined to basalt plains grasslands in the vicinity of Bacchus Marsh, Maldon, Sutton Grange, Taradale and possibly Woorndoo.

Easily confused with Pterostylis bicolor, but that species favours woodlands and coastal scrub, is generally more robust with widely spaced non-overlapping flowers. The closely related P. clivicola is a montane species that has an elliptical labellum and a more elevated central ridge on the labellum appendage.

This species is poorly known and seldom collected.

Created by: Jeff Jeanes, 2015-06-02
Updated by: Neville Walsh, 2018-06-19
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Pterostylis
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Pterostylis agrestis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Pterostylis agrestis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Goldfields present native
Central Victorian Uplands present native

State distribution

Distribution map
State
Victoria