PlantaeDB Logo
Login Sign-up

Genus Rumex in Family Polygonaceae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Rumex L. (Polygonaceae) is a cosmopolitan herbaceous genus of approximately 200 species of docks and sorrels, with a primary concentration in temperate Eurasia and North America but additional representation in tropical highlands, Australia and parts of Africa (POWO, 2024; WFO, 2024). The type species, designated by Linnaeus, is Rumex acetosa L. (APG IV, 2016). Plants are usually perennials, sometimes rhizomatous, bearing alternate simple leaves whose basal sheaths are fused into an ochrea, a distinctive feature of Polygonaceae. The inflorescence is a terminal panicle or raceme of small, often unisexual, six‑tepal flowers; in fruit the inner three tepals enlarge into three wing‑like valves that enclose a trigonous achene. Ovary development follows the three‑carpellate plan with a single basal ovule and three persistent styles, a key diagnostic trait of the genus.

Diversity is greatest in the Northern Hemisphere, where several species form regional endemics (e.g., R. alpinus in the Alps, R. arcticus in subarctic zones). Many taxa inhabit disturbed sites, riverbanks, meadows and cultivated ground, ranging from sea level to alpine elevations (Horton et al., 2005). Molecular phylogenetic work (Schuster et al., 2015; Lamb Frye et al., 2020) confirms that Rumex is monophyletic within Polygonoideae and reveals several well‑supported clades that largely correspond to traditional sections such as Acetosa, Rumex and Vesicaria. Although some treatments maintain Acetosella as a separate genus, APG IV and recent flora resources place it within Rumex as a subgeneric rank (APG IV, 2016; WFO, 2024). The circumscription of several problematic taxa remains fluid, especially in the temperate–tropical transition zones, and additional phylogenetic resolution is required.

Intrinsic biology is dominated by anemophily; wind‑borne pollen is released from pendulous anthers, while seed dispersal relies on the winged fruit valves that aid wind transport and occasional water dispersal (Schuster et al., 2015). Chromosome base number is x = 10, reported consistently across sampled species (Lamb Frye et al., 2020).

Humans interact with Rumex primarily through horticultural and culinary use. R. acetosa and related sorrels are cultivated as leafy vegetables, while ornamental cultivars such as the red‑leaved forms of R. sanguineus appear in gardens (POWO, 2024). Conversely, species such as R. crispus (curly dock) are widespread weeds of agricultural and ruderal habitats, sometimes becoming invasive outside their native range (GBIF, 2024).

Conservation status is generally secure for widespread taxa, but regional endemics face habitat loss and climate‑induced niche shifts. Ongoing taxonomic clarification and demographic monitoring will be essential to anticipate future threats to Rumex diversity.

Pick a Species to see its components: