Anthemis is a genus of aromatic annual and biennial herbs in the family Asteraceae (tribe Anthemideae), comprising approximately 100 accepted species. Plants typically grow 5–90 cm tall, with branched, hairy stems and alternate, pinnately lobed or dissected leaves that are characteristically aromatic when crushed. Flower heads are radiate (occasionally discoid), with ray florets usually white or pale yellow and disc florets yellow. The fruit is a cypsela bearing 9–10 ribs, with the pappus absent or reduced to a small crown. The chromosome base number is x = 9.
The genus was described by Carl Linnaeus and published in Species Plantarum in 1753. It is placed in the Asteraceae subfamily Asteroideae and is closely related to Chamaemelum, sharing the common names chamomile, dog-fennel, and mayweed. The GBIF database records 392 descendant taxa, reflecting the breadth of the group across the Old and New World.
Anthemis is native to the Mediterranean region and southwest Asia eastward to Iran, but many species have spread widely as weeds of arable land and waste places and are now naturalized across Europe, the British Isles, North Africa, and parts of North America. The genus includes both ornamental garden plants, long cultivated for their daisy-like flowers, and troublesome agronomic weeds of cereals and disturbed ground.
Etymology
The name Anthemis derives from Greek, generally interpreted in reference to flowers; the Greek word anthemon means "flower." This reflects the showy, daisy-like flowerheads characteristic of the genus. Regional vernacular names in various European languages further reflect local botanical traditions, while the shared common names — chamomile, dog-fennel, and mayweed — underscore the genus's close relationship with Chamaemelum.
Distribution
Anthemis is native to the Mediterranean basin and southwest Asia, with its range extending eastward to Iran. The genus has a secondary centre of diversity in the Caucasus and Anatolia, and species occur through much of temperate Eurasia. Many species have spread far beyond their native range: in Switzerland, 5–6 species (including A. arvensis, A. cotula, A. tinctoria, and A. austriaca) are documented in the national checklist. Across Britain, several species are locally common on calcareous arable land, roadsides, and waste places. In North America, multiple introduced species — especially A. cotula and A. arvensis — are naturalized from the northeastern United States into Canada and across much of the continent.
Ecology
Anthemis species are typically aromatic annual or biennial herbs of open, disturbed habitats: arable fields, roadsides, rubbish heaps, calcareous grasslands, and coastal sands. Flowers are pollinated mainly by flies and beetles; plants are hermaphrodite and self-fertile. Several species serve as larval food plants for Lepidoptera, including Orthonama obstipata (The Gem moth). Bucculatrix anthemidella is a specialist leaf-miner restricted to Anthemis tinctoria. Some species, notably A. cotula, are aggressive colonisers of disturbed ground and are considered noxious or invasive weeds in parts of North America, including appearing on Colorado's B-list of noxious weeds.
Cultivation
Several Anthemis species and cultivars are grown as ornamental garden plants, prized for their long-lasting, daisy-like flowers. Two taxa have received the Royal Horticultural Society's Award of Garden Merit: Anthemis punctata subsp. cupaniana, a low-growing, silver-leaved perennial with white flowers, and Anthemis tinctoria 'E.C. Buxton', a lemon-yellow-flowered cultivar valued for summer borders. In general, Anthemis succeeds in a sunny position in well-drained, neutral to slightly acidic soil, though some species tolerate heavy clay. Plants bloom in summer (June–July), with seeds ripening from July to August.
Propagation
Anthemis is propagated primarily by seed. For annual species, seed is best sown outdoors as soon as it is ripe, taking advantage of natural stratification conditions. Perennial ornamental cultivars such as A. tinctoria selections can be divided or propagated from basal cuttings in spring to maintain true form.
Cultural Uses
Several Anthemis species have a documented history of medicinal use. Anthemis arvensis (corn chamomile) was traditionally used as a febrifuge and is considered one of the best fever-reducing species indigenous to France, with flowers and leaves applied medicinally. Anthemis tinctoria (dyer's chamomile) is notable for yielding a yellow dye from its flower heads, historically used to dye wool and fabric — hence its common name. The genus name chamomile, shared with related Chamaemelum, further reflects the long ethnobotanical recognition of these plants in European herbal tradition.
History
The genus Anthemis was first formally published by Carl Linnaeus in Species Plantarum in 1753, the founding work of modern botanical nomenclature. Linnaeus' type species was Anthemis maritima. By the nineteenth century, botanical illustrators such as Prof. Dr. Otto Wilhelm Thomé were documenting species like Anthemis arvensis in comprehensive regional floras — Thomé's detailed plate appears in Flora von Deutschland, Österreich und der Schweiz (1885). Over subsequent decades, various authors proposed segregate genera (including Maruta, Lyonnetia, and Ammanthus) for portions of the group; these are now generally synonymised back into Anthemis under modern circumscriptions.
Taxonomy
Anthemis L. was formally described by Carl Linnaeus and published in Species Plantarum in 1753 (GBIF usage key 3122476). It is classified in the family Asteraceae, subfamily Asteroideae, tribe Anthemideae. The type species is Anthemis maritima. Several historical generic segregates are now treated as synonyms, including Lyonnetia, Maruta, and Ammanthus. The chromosome base number for the genus is x = 9. GBIF currently records 392 descendant taxa under the accepted genus concept, reflecting considerable species diversity and ongoing taxonomic revision. The Swiss Checklist 2017 recognises the genus in the official national flora.
