Common name: Square-fruited Twinleaf
Roepera prismatotheca (F.Muell.) Beier & Thulin APNI* Synonyms: Zygophyllum prismatothecum F.Muell. APNI*
Description: Small spreading annual.
Leaflets continuous with the cuneate petiole, cuneate, forming an apically 2-lobed leaf, 12–28 mm long (including the petiole).
Sepals 4. Petals 4, oblanceolate, 3 mm long, about as long as sepals, ± acute at apex, yellow. Stamens 8; filaments winged in lower part. Fruiting pedicels 1–2 mm long, erect or spreading ± horizontally.
Capsule obtusely 4-angled, narrow-oblong to cylindrical, 10–15 mm long, in the grooves between the angles densely white-papillose, with an erect herbaceous appendage at apex of each angle; seeds 2 or 3 per loculus.
Flowering: June–November
Distribution and occurrence: Grows on barren ground, often somewhat salty brown gibber soil; west of Tibooburra area.
NSW subdivisions: NFWP
Other Australian states: S.A. N.T.
Text by Hj. Eichler
Taxon concept: Flora of NSW 3 (1992)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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