Genus Coriandrum in Family Apiaceae
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).
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Genus Description
Suggest a correction!Coriandrum (authority L.) is a monotypic genus in the family Apiaceae, containing the cultivated annual herb Coriandrum sativum L., the source of coriander spice (POWO, 2024; WFO, 2024). The plant originated in the Mediterranean and Near East but is now naturalised worldwide in temperate and subtropical regions, thriving in disturbed soils, field margins and cultivated beds.
The genus is distinguished by an erect, glabrous habit and highly dissected foliage; basal leaves are broadly ovate to palmately lobed, while upper leaves are finely divided into linear leaflets. Inflorescences are compound umbels bearing numerous small, actinomorphic flowers; each flower has five white to pale‑pink petals, five stamens and an inferior ovary with two carpels each bearing a single ovule. The fruit is a schizocarp that splits into two ribbed mericarps, each containing a small, aromatic seed.
Coriandrum has a narrow centre of diversity in the eastern Mediterranean, especially Turkey, Greece and western Iran (Downie et al., 2010). Wild populations are rare and confined to calcareous grasslands, but the species persists through extensive cultivation and occasional escape. Typical habitats range from sea‑level fields to elevations of about 1500 m.
Pollination is primarily by flies and bees, and the ribbed mericarps facilitate dispersal by wind or attachment to animal fur. Chromosome counts consistently report 2n = 22, indicating a base number of x = 11 (Wang et al., 2018). The essential oil composition, dominated by linalool and geranyl acetate, underlies its culinary and aromatic value.
In the most recent treatment of Apiaceae, the genus occupies a basal position within tribe Coriandreae and subfamily Apioideae (Miller & Constance, 2016). Molecular studies confirm its monophyly and placement in this clade (Downie et al., 2010). No formal subgeneric groups are recognised; synonymy is limited to Coriandrum sativum L., with occasional informal subspecies treated by some authors but not widely accepted.
Coriandrum sativum is a major horticultural crop, valued for its leaves, seeds and essential oil, and is cultivated worldwide as an ornamental herb. It does not provide timber and only occasionally behaves as a weed in agricultural settings.
Wild populations face habitat loss and over‑harvesting, yet widespread cultivation safeguards the species. Research priorities include assessing genetic diversity of native populations and expanding breeding programmes for improved yield and disease resistance.