Phylica is a genus of evergreen woody shrubs and small trees in the buckthorn family Rhamnaceae, described by Linnaeus in Species Plantarum (1753). The genus is sometimes referred to by the vernacular name Cape myrtles, a nod to its centre of diversity in the Cape Floristic Region of southern Africa. The name comes from the Greek phullikos, meaning "of leaves" or "concerning leaves," a reference to the densely leafy stems and crowded, often heath-like foliage that characterise most species.
The genus is moderately large. Plants of the World Online recognises 148 accepted species, while popular treatments and Wikipedia cite "about 150." Members vary enormously in habit and leaf form, ranging from low, ericoid sub-shrubs with tiny needle-like leaves to upright shrubs and small trees with broader foliage, but they share a tendency toward tough, leathery leaves and dense, terminal flower clusters. The Afrikaans family name for Rhamnaceae, hardeblaar ("hard-leaved"), captures this trait that runs throughout the genus.
The overwhelming majority of Phylica species are South African endemics, with the genus forming a conspicuous element of the fynbos shrublands of the Cape Floristic Region. Outside South Africa, the genus extends north into tropical Africa as far as Tanzania, and a small number of species occur on Madagascar and the western Indian Ocean islands of Mauritius and Réunion. Remarkably, isolated species are also found on remote South Atlantic and Subantarctic islands, including Saint Helena, Tristan da Cunha, Gough Island, and Île Amsterdam — a distribution that reflects long-distance dispersal across the southern oceans.
Phylica has a long history in European horticulture: several species, notably P. pubescens and P. plumosa, were already being grown in European gardens during the 17th and 18th centuries, and P. plumosa was among the earliest dried botanical specimens sent from the Cape to Europe. Today the genus remains commercially important in the cut-flower and dried-flower trades, prized for the texture and durability of its inflorescences. Among the better-known species are Phylica pubescens (featherhead), P. ericoides, P. arborea (Island Cape Myrtle, the tree of the remote South Atlantic islands), and P. nitida of Réunion.
Etymology
The genus name Phylica was coined by Linnaeus from the Greek φυλλικός (phullikos), meaning "of leaves" or "concerning leaves." The name alludes to the densely leafy stems characteristic of most species, whose crowded, often small and heath-like leaves give the plants a distinctly foliose appearance.
Distribution
Phylica is centred on southern Africa, where the great majority of species are endemic to the Cape Floristic Region and form a conspicuous element of the fynbos vegetation. The native range extends northward through tropical Africa as far as Tanzania, and a number of species occur on Madagascar and on the western Indian Ocean islands of Mauritius and Réunion. Beyond the African continent, Phylica has a striking presence on remote Atlantic and Subantarctic islands: species are recorded from Saint Helena, Tristan da Cunha, Gough Island, and Île Amsterdam in the southern Indian Ocean. This island-hopping distribution across the southern oceans is unusual among Rhamnaceae and points to long-distance dispersal in the genus's history.
Ecology
Within South Africa, Phylica species are a defining component of the fynbos — the fire-prone, sclerophyllous shrubland that dominates the Cape Floristic Region. The genus as a whole is adapted to Mediterranean and subtropical montane environments, with tough leathery leaves consistent with seasonally dry, nutrient-poor habitats. Many species are narrow endemics confined to specific mountain ranges or vegetation types within this biodiversity hotspot.
Cultivation
Several Phylica species have a long horticultural history. P. pubescens and the similar P. plumosa were already being cultivated in European gardens in the 17th and 18th centuries, and the genus contains many attractive ornamental species valued for their distinctive plumose or feathery inflorescences. Today Phylica remains commercially significant in the cut-flower and dried-flower trade, where the long-lasting, textured flower heads are prized for their durability and form.
History
Phylica was one of the South African genera that reached European botanical attention early in the colonial period. P. plumosa was among the earliest dried specimens shipped from the Cape to European herbaria, and by the 17th–18th centuries living plants of P. pubescens and P. plumosa were being grown in European gardens. The genus was formally established by Linnaeus in Species Plantarum (1753). A putative fossil record extending into the mid-Cretaceous — Phylica piloburmensis from Burmese amber roughly 99 million years old — was once cited as evidence of great antiquity for the genus, but later workers have disputed this placement and at least one study has moved the fossil to a separate genus, Nothophylica.
Taxonomy notes
Phylica L. sits in family Rhamnaceae (order Rosales) and is the type genus of the tribe Phyliceae. It was described by Linnaeus in Species Plantarum (1753, p. 195). Plants of the World Online currently recognises 148 accepted species, while Wikipedia and SANBI cite "about 150"; GBIF descendant counts vary across datasets from roughly 116 to 304 names, reflecting heavy synonymy. POWO lists five generic synonyms: Alaternoides Adans. (homotypic) and the heterotypic Calophylica, Petalopogon, Soulangia, and Tylanthus. GBIF records the vernacular name "Cape myrtles" for the genus.
Cultural uses
Beyond ornamental garden use, Phylica has economic value in the global floristry trade. The genus is sought after for cut and dried flower arrangements, where the durable, textured inflorescences — particularly those of P. pubescens and P. plumosa — hold their form well after harvest. This trade has roots that go back to the earliest European interest in Cape flora.
