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Electronic Flora of South Australia genus Fact Sheet

Family: Polygonaceae
Emex

Citation: Necker ex Campderá, Monog. Rumex 58 (1819).

Derivation: Derivation of name uncertain, probably derived from the related genus Rumex.

Synonymy: Not Applicable

Common name: None

Description:
Annual with long taproots; leaves entire or nearly so, generally ovate; stipular sheaths truncate and cleft at the apex.

Flowers monoecious, small, in axillary whorl-like clusters; male flowers with 5 or 6 spreading perianth-segments and 4-6 stamens; female flowers with a triangular tube and 6 lobes, the 3 outer lobes becoming in fruit 3 rigid spines, the 3 inner lobes ovate to lanceolate and erect; styles 3.

Fruit a trigonous nut.

Distribution:  2 or 3 species usually recognised, from the Mediterranean and South Africa. (D.J. Gilbey (1974) J. Aust. Inst. Agr. Sci. 40:114-120.)

Biology: No text

Key to Species:
1. Inner perianth-segments ovate, with shortly pointed apices
E. australis 1.
1. Inner perianth-segments lanceolate, acute
E. spinosa 2.

Author: Not yet available


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