Roepera ammophila (F.Muell.) Beier & Thulin

Sand Twinleaf

Pl. Syst. Evol. 240: 30 (2003)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Erect or ascending, much-branched annual herb 10–30 cm high; stems spreading and ascending. Leaves 15–45 mm long, green; leaflets articulate at base, linear-oblong, 10–25 mm long, 1.5–3 mm wide, fleshy, apex truncate or sometimes rounded or emarginate; common petiole flattened. Sepals 4, ovate, 1.5–3 mm long, deflexed or spreading in fruit; petals 4, narrow-obovate to narrow-elliptic, 1.5–4 mm long, apex rounded or pointed, white; stamens 4, filaments filiform, hardly winged at base. Fruiting pedicels 2–4 mm long; fruit a 4-angled loculicidal capsule, campanulate to turbinate, 5–7 mm long, drooping, truncate at apex with a short point; seeds usually 3 or 4 per cell. Flowers mostly Aug.–Nov.

LoM, MuF, MuM, MSB, RobP, VRiv. Also SA, NSW. In Victoria, confined to the north-west where found in a variety of habitats, mostly on sand and sandy loams but also on heavier clay soils.

The mapped distribution of R. ammophila probably includes some older, unvouchered records attributable to the more recently described R. similis. The latter species is readily distinguished by its 8 stamens and only 1 or 2 seeds per cell.

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 (as Zygophyllum ammophilum F.Muell.).
Updated by: Neville Walsh, 2019-06-06
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Roepera ammophila in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Roepera ammophila in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Victorian Riverina present native
Murray Scroll Belt present native
Robinvale Plains present native
Murray Fans present native