Felicia is a genus of roughly 85 species of small shrubs, perennial herbs, and annuals in the daisy family (Asteraceae), placed in the tribe Astereae. The genus is overwhelmingly African, with its centre of diversity in the Cape Floristic Region of South Africa; its range extends north along the east of the continent to Sudan, across to the south-western Arabian Peninsula, and down the west coast to Angola, with isolated populations near the Cameroon–Nigeria border. The genus was established by the French botanist Henri Cassini in 1818 and is presumed to honour the Italian-Swiss scientist Fortunato Bartolomeo de Felice.
In habit, Felicia is varied but rarely tall. About sixty percent of the species are shrubs typically 15 to 60 cm high (occasionally reaching two metres), another fifth are herbaceous perennials, and the remainder are annuals. Stems are often well-branched and carry many flower heads above the foliage. The capitula are classically daisy-like, with a central disc of small yellow florets surrounded by a single whorl of ray florets — most commonly sky blue or violet blue, but also pink, mauve, white, or yellow depending on the species. Individual florets are 5-merous and the heads are subtended by neat rings of involucral bracts. Fruits are small achenes (cypselae) topped with a pappus of fine bristles that acts as a parachute, carrying the seed on the wind.
Members of Felicia inhabit a wide range of southern and eastern African environments, including fynbos, Karoo scrub, coastal sand dunes, sandy flats, stony hillsides and rocky outcrops, seasonally wet sites, and open woodlands. The flowers are visited by a broad range of insects: butterflies, wasps, solitary and honey bees, and even pollen-carrying thrips have been recorded on the type of the genus, Felicia amelloides. Several species — most famously the blue marguerite, F. amelloides, and the kingfisher daisy, F. heterophylla — are widely grown as garden ornamentals for their long flowering season and unusually pure blue ray florets, and ornamental hybrids have been bred from them. The genus is otherwise of limited economic importance, and the IUCN's Global Invasive Species Database holds no record for any Felicia.
Etymology
The genus Felicia was established by the French botanist Henri Cassini in 1818, in the Bulletin des Sciences par la Société Philomathique de Paris. The name is presumed to commemorate Fortunato Bartolomeo de Felice (1723–1789), an Italian-Swiss scientist and encyclopedist, though Cassini did not state this explicitly in the protologue.
Distribution
Felicia is essentially an African genus with a strong southern bias. Plants of the World Online lists native occurrences across tropical and southern Africa and the Arabian Peninsula — from Angola, Namibia and the Cape Provinces of South Africa north through Botswana, Zambia, Zimbabwe, Mozambique, Malawi and the Great Lakes states to Ethiopia, Eritrea, and Sudan, with outposts in Nigeria and Cameroon and an Arabian foothold in Saudi Arabia and Yemen. The centre of diversity is the Cape Floristic Region of South Africa, where SANBI estimates that around 79 of the roughly 84 currently recognised species occur, most of them in the Western and Eastern Cape. Outside its native range, POWO records Felicia as introduced only in France, almost certainly reflecting garden escapes of F. amelloides and related ornamentals.
Ecology
Felicia species occupy a broad spread of habitats across their African range, including fynbos, succulent Karoo scrub, coastal and inland sand dunes, sandy flats, stony and gravelly hillsides, seasonally wet seeps, and open woodlands. The daisy-like capitula attract a wide pollinator pool — butterflies, wasps, solitary and honey bees are commonly recorded, and SANBI notes that even tiny thrips carry pollen between the heads of F. amelloides, where flower spiders sometimes lurk among the disc florets. Seed dispersal is by wind: the pappus of fine bristles atop each cypsela acts as a parachute, scattering achenes from the dried heads. The genus also has at least one specialised antagonist, the root-parasitic santalaceous shrub Thesium namaquense, which can attach to Felicia hosts.
Cultivation
Several Felicia species — particularly the evergreen blue marguerite F. amelloides and the annual kingfisher daisy F. heterophylla — are grown as ornamentals for their long flowering season and clear blue ray florets, and a number of hybrids and cultivars have been bred. Cultural requirements mirror the dry, well-drained, sun-exposed habitats of the South African Cape: light sandy or gravelly soil with sharp drainage, full sun, and only moderate watering once established. SANBI describes F. amelloides as hardy, frost-resistant, and low-maintenance, typically flowering for five or more years when given those conditions; light pruning after the main flush keeps plants compact and encourages further bloom.
Propagation
Felicia species can be raised from seed or from softwood cuttings. For the widely cultivated F. amelloides, SANBI recommends taking cuttings in spring (August–September in the southern hemisphere), with rooted plants typically reaching flowering size within about a year. Wind-dispersed seed germinates readily for annual species such as F. heterophylla when sown into a free-draining medium and kept in full sun.
Conservation
No Felicia species are recorded in the IUCN's Global Invasive Species Database, which explicitly notes that the genus is "not present yet in [its] archive." The genus is not known to be invasive outside its native range; POWO records introduced occurrences only in France.
Taxonomy Notes
Cassini's Felicia sits in subfamily Asteroideae, tribe Astereae, and POWO currently accepts 86 species in the genus (Wikipedia gives ~85, SANBI ~84 — figures that fluctuate as revisions appear). Cassini protologue: Bulletin des Sciences par la Société Philomathique de Paris 1818: 165, expanded in the Dictionnaire des Sciences Naturelles 16: 314 (1820). POWO lists nine heterotypic synonyms — Agathaea, Asterosperma, Caelestina, Charieis, Detridium, Detris, Fresenia, Kaulfussia, and Munychia — reflecting a long history of segregate genera now folded back into Felicia. Wikipedia recognises six infrageneric sections: Anhebecarpaea, Dracontium, Felicia, Lignofelicia, Longistylus, and Neodetris. The genus is closely related to Aster and is separated on cypsela characters.
History
The first recorded Felicia, then known as Aster tenellus, was described by the English botanist Leonard Plukenet in 1692. Henri Cassini formally established the genus Felicia in 1818, and the German botanist Jürke Grau revised it in 1973, adding 17 new species. At least four further species have been described since 1999, and POWO's species count has continued to climb as a result.
