Parietaria debilis G.Forst.

Shade Pellitory

Prodr. 73 (1786) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Annual herb, 6–30 cm high, not woody at base; stems erect, sometimes ascending, sometimes rooting at nodes, densely covered in curved and hooked hairs, sometimes also scattered glandular and flexuose hairs. Leaf-lamina ovate to broadly ovate, 0.6–4.5 cm long, 4–18 mm wide, more or less delicate, 3-nerved; base subcordate, cuneate or truncate; apex blunt or obtusely acuminate, midvein straight, the lateral veins with delicate tertiary veins. Inflorescence a 2–10-flowered dichasium; central flowers and solitary flower bisexual; lateral flowers female, subtending bracts 3, free or the central bract fused with the 2 shorter lateral bracts, narrowly lanceolate to ovate, incompletely hiding lateral flowers, remaining soft at maturity, green, a delicate reticulate venation sometimes visible, midrib distinct; perianth of all flowers similar, c. 2.0–2.5 mm long, midvein and margins reddish-brown; stigma sessile. Achene 1.2–1.4 mm long, 0.8–0.9 mm wide, mid to dark brown, hard, not crushed or crumbled; apiculum terminal or displaced sidewards. Flowers Aug.–Nov.

Brid, CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MuF, MuM, NIS, OtP, RobP, VRiv, VVP, WaP, WPro, Wim. All States. Widespread through temperate regions of the world. Common throughout the State, from shrublands in the northwest, where sometimes forming dense mats beneath shrubs, to coastal scrub on dunes.

Variable in leaf size and shape, petiole length, bract shape, sex of flowers, and the orientation of the apiculum on the nut. Possibly including 2 taxa, one with a terminal apiculum and ovate to broadly ovate bracts (mostly in northern parts of State), the other with apiculum displaced sidewards and the bracts lanceolate to narrowly oblong (mostly southern Victoria).

Source: Gebauer, R. (1996). Parietaria. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2019-07-30
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Rosales
family Urticaceae
genus Parietaria
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Parietaria debilis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Parietaria debilis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Robinvale Plains present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales
Australian Capital Territory