Zygophyllum glaucum F.Muell.

Pale Twinleaf

Trans. & Proc. Victorian Inst. Advancem. Sci. 1: 29 (1855)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Erect or ascending annual herb or perennial subshrub to c. 20 cm high; stems stout, often forming a mat up to 2 m diam. Leaves 15–50 mm long, glaucous or green; leaflets articulate at base, oblique-obovate, 10–40 mm long, 3–22 mm wide, fleshy, apex rounded; common petiole narrow. Sepals 4, ovate-lanceolate, 5–8 mm long, spreading in fruit; petals 4, obovate, 8–15 mm long, apex truncate to emarginate, bright yellow; stamens 8, filaments broadly winged in lower half, wings fringed at apex. Fruiting pedicels 5–8 mm long; fruit a 4-angled loculicidal capsule, ovoid-oblong to obovoid-oblong, 14–20 mm long, drooping, rounded at apex or rarely rather truncate, with a short apical point; seeds 3–5 per cell. Flowers May–Dec.

CVU, LoM, MuF, MuM, MSB, OtP, RobP, VRiv, VVP, Wim. All mainland states, ?Tas. Apart from a few isolated sites near Melbourne (Long Forest near Bacchus Marsh, Jacksons Creek between Diggers Rest and Keilor), confined in Victoria to the north-west where widespread and sometimes locally common. Grows predominantly in mallee, often on gypseous sands. .

Specimens with more or less campanulate fruit with tapering sides and obliquely truncate apices have been collected in Victoria. These plants may require recognition at some taxonomic level.

Source: Jeanes, J.A. (1999). Zygophyllaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
genus Zygophyllum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Zygophyllum glaucum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Zygophyllum glaucum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Scroll Belt present native
Robinvale Plains present native
Murray Fans present native
Otway Plain present native
Central Victorian Uplands present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales