Rumex L.
Fls us. perfect, in clusters on simple or branched racemes or spikes. Outer 3 tepals small, thin; inner 3 enlarging and hardening in fr., with or without tubercles on midribs. Stamens 6, basifixed. Fr. triquetrous or trigonous, invested by persistent hardened per. Annual to perennial herbs, us. with deeply descending stout taproot; lvs alt., stipules ochreate. Subcosmopolitan genus with some 150 spp., the N.Z. pair endemic.
Key
1
Infl. much-branched; inner tepals not tuberculate, margins with long curved sharp processes
Infl. simple or sparingly branched; inner tepals tuberculate, margins entire or with 1-2 short teeth
