''Tremandra'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Elaeocarpaceae Elaeocarpaceae is a family of flowering plants. The family contains approximately 615 species of trees and shrubs in 12 genera."Elaeocarpaceae" In: Klaus Kubitzki (ed.). ''The Families and Genera of Vascular Plants'' vol. VI. Springer-Verlag: Ber ...

. It contains two species, both

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to Western Australia.

Description

Plants in the genus ''Tremandra'' are shrubs to high with small to medium sized leaves arranged in opposite pairs and on a

petiole Petiole may refer to: *Petiole (botany), the stalk of a leaf, attaching the blade to the stem *Petiole (insect anatomy) In entomology, petiole is the technical term for the narrow waist of some hymenopteran insects, especially ants, bees, and ...

. The leaves are simple, flat, heart or egg-shaped and may be rounded at the base. The mature leaves are smooth or covered with soft hairs on the upper surface, the underside covered in fine, soft hairs. The leaf margins are flat and scalloped. The single flowers are borne on a thread-like peduncle in leaf axils with 5 small to medium sized

bract In botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in size, color, shape or texture. They also lo ...

s. The sepals and petals are whorled around the centre floral receptacle. The fruit are a hairy capsule long containing 2 seeds that are dispersed at maturity.

Taxonomy and naming

The genus ''Tremandra'' was first formally described in 1824 by

Augustin Pyramus de Candolle Augustin Pyramus (or Pyrame) de Candolle (, , ; 4 February 17789 September 1841) was a Swiss people, Swiss botany, botanist. René Louiche Desfontaines launched de Candolle's botanical career by recommending him at a herbarium. Within a couple ...

from an unpublished description by

Robert Brown Robert Brown may refer to: Robert Brown (born 1965), British Director, Animator and author Entertainers and artists * Washboard Sam or Robert Brown (1910–1966), American musician and singer * Robert W. Brown (1917–2009), American printmaker ...

and de Candolle's description was published in '' Prodromus Systematis Naturalis Regni Vegetabilis''. The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

''(Tremandra)'' is derived from the Greek for "hole" and "anther", referring to the anthers bursting open through a hole.

Species list

The following species names are accepted by the

Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Sys ...

as at January 2020: * '' Tremandra diffusa'' R.Br ex

DC. Augustin Pyramus (or Pyrame) de Candolle (, , ; 4 February 17789 September 1841) was a Swiss botanist. René Louiche Desfontaines launched de Candolle's botanical career by recommending him at a herbarium. Within a couple of years de Candolle ...

; * '' Tremandra stelligera'' R.Br ex

Distribution

Both species of ''Tremandra'' are found in the south-west of Western Australia.

References

{{Taxonbar, from=Q6152082 Elaeocarpaceae genera Flora of Australia Rosids of Western Australia