Stylidium section Uniflora is a taxonomic rank under Stylidium subgenus Andersonia

Stylidium subg. Andersonia

Andersonia is a subgenus of Stylidium that is characterized by a linear hypanthium, recurved mature capsule walls, an erect and persistent septum, and many seeds...

. In 2000, A.R. Bean published a taxonomic revision of subgenus Andersonia and established this section to separate these five species based on morphological and cladistic

Cladistics

Cladistics is a method of classifying species of organisms into groups called clades, which consist of an ancestor organism and all its descendants . For example, birds, dinosaurs, crocodiles, and all descendants of their most recent common ancestor form a clade...

 analysis.

As the section epithet

Epithet

An epithet or byname is a descriptive term accompanying or occurring in place of a name and having entered common usage. It has various shades of meaning when applied to seemingly real or fictitious people, divinities, objects, and binomial nomenclature. It is also a descriptive title...

 suggests, the most striking feature of the species in this taxonomic group are the solitary flowers on the scapes

Scape (botany)

In botany, scapes are leafless flowering stems that rise from the ground. Scapes can have a single flower or many flowers, depending on the species....

, a departure from the traditional form of most Stylidium species which have more than one flower per scape. Distribution is primarily in tropical Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

 with one species, S. pedunculatum

Stylidium pedunculatum

Stylidium pedunculatum is a dicotyledonous plant that belongs to the genus Stylidium . It is an annual plant that grows from 5 to 10 cm tall. The linear or deltate leaves, about 20-200 per plant, are mostly in terminal rosettes but with some scattered along the elongate stem. The leaves are...

also being found on the Aru Islands

Aru Islands

The Aru Islands are a group of about ninety-five low-lying islands in the Maluku province of eastern Indonesia. They also form a regency of Indonesia.-Geography:...

.