PlantaeDB Logo
Login Sign-up

Genus Cyphanthera in Tribe Anthocercideae

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!

Cyphanthera Miers is a small, shrub‑forming genus of Solanaceae. About seven species are currently accepted (POWO, 2024; WFO, 2024). The plants are endemic to Australia, occurring in heathlands, open woodlands and limestone outcrops from southwestern Western Australia to the Eyre Peninsula of South Australia. The type species is Cyphanthera albicans (R.Br.) Miers.

All members are woody, multi‑stemmed shrubs 0.5–2 m tall. Leaves are alternate, simple, lanceolate to ovate, densely covered with stellate or dendritic trichomes giving a grey‑green or whitish sheen; stipules are absent. Flowers are solitary or in short terminal racemes. The calyx is five‑lobed; the corolla is funnel‑shaped, white to pale pink, with a shallow tube and five spreading lobes. Five epipetalous stamens insert near the tube base; anthers have a small apical appendage. The ovary is superior, bicarpellary with axile placentation, the style with a capitate stigma. Fruit is a dry dehiscent capsule splitting into two valves; numerous flattened seeds have narrow wings.

The genus reaches its highest diversity in the Southwest Australian Floristic Region, where five species are endemic (Haegi, 1985). Remaining taxa occur in the mallee‑scrub of South Australia or on coastal limestone of the Nullarbor Plain. Habitats range from sea‑level dunes to montane heath up to roughly 1 000 m. Many populations occupy nutrient‑poor, siliceous soils and are fire‑sensitive.

Pollination is presumed by native bees and small moths. Seed dispersal is passive; winged seeds are wind‑distributed after capsule dehiscence. Cytologically, the tribe Anthocercideae shows a base chromosome number x = 12 (Miller & West, 2004), reported in several Cyphanthera species.

Recent molecular work places Cyphanthera as a monophyletic clade within Anthocercideae, sister to the Anthocercis–Duboisia lineage (Olmstead et al., 2008). Traditional taxonomy treated Cyphanthera as a subgenus of Anthocercis (Haegi, 1985), but phylogenetic evidence supports generic rank, a treatment reflected in POWO and WFO. No formal infrageneric sections are widely accepted.

Several species are cultivated as drought‑tolerant ornamentals for their profuse, fragrant flowers and fine foliage. They are popular in low‑maintenance gardens and native landscaping, but none are significant timber or food crops, and they are not considered invasive.

Habitat loss from grazing, mining and altered fire regimes threatens several narrowly distributed taxa; many remain data‑deficient. Continued monitoring and ex situ conservation are recommended to ensure the long‑term persistence of Cyphanthera in a changing climate.

Pick a Species to see its components: