Utricularia barkeri is a small terrestrial bladderwort from south-eastern Australia. Its pale mauve flowers can resemble other members of the U. dichotoma group, but the attachment of the tiny bracts below the flowers offers an important clue to its identity.
Name and classification
Utricularia barkeri R.W.Jobson is accepted by Kew, with South Australia, Victoria and Tasmania listed in its native range. Plants of the World Online. The name was published on 25 October 2013 and honours botanist William (Bill) R. Barker. The type was collected near Casterton, Victoria, by Richard Jobson and Robert Gibson in November 2012. International Plant Names Index.
The species belongs to section Pleiochasia, subgenus Polypompholyx. Its original description separated it from U. dichotoma using bracts with approximately equal portions above and below their attachment, together with the flecked upper flower lip. Original description and diagnosis.
Recognising the plant
VicFlora describes narrow leaves 3–12 mm long, traps 1.5–2 mm long and flower stalks 8–28 cm tall. Flowers are usually paired. The light-mauve corolla measures 5–12 mm, with a darker-flecked upper lip and broad lower lip bearing two yellow ridges beside purple ridges. The straight cylindrical spur is about two-thirds the lower lip's length and ends in a broad two-lobed tip. Capsules measure 3–3.5 mm, with seeds about 0.5 mm long. VicFlora description.
Photograph the bracts and a side view of the spur as well as the flower face. The original diagnosis makes bract attachment a central comparison with U. dichotoma; flower colour alone is insufficient. Diagnostic comparison.
Habitat and seasonal growth
The original account records seasonal sedge swamps and heath soakages on deep sand, mainly near sea level, with some higher sites on Kangaroo Island, Flinders Island and in the Grampians. Distribution and ecology. VicFlora treats it as a terrestrial perennial, with flowering from October to January. Regional life-cycle account.
Boaz Ng's Victorian field observations include seepages, wet track edges, seasonal ditches and swamp or creek floodplains. He describes chiefly winter growth followed by spring and summer flowering, with plants sometimes behaving as annuals where their habitat dries. This is an ecological observation, not a demonstrated requirement to dry every cultivated accession. Field observations.
Flower variation and pollination
Stephen Fretwell documented both typical and unusually pale flowers at Topperwein Swamp in the March 2019 Victorian Carnivorous Plant Society newsletter. A pale wild form is an observation of variation; that report does not establish a named cultivar. VCPS field report.
Ng also photographed a European honey bee visiting a flower, describing how its weight opened the lower lip and brought its head against the reproductive structures. That record documents a visitor and proposed pollen-transfer mechanism, without demonstrating that this is the species' only effective pollinator. Photographed flower visit.
Cultivation and propagation
The reviewed sources establish wetland ecology, stolon-bearing growth and seed production in wild specimens. They do not provide a repeatable, species-specific nursery germination or division protocol. Original reproductive observations.
For documented cultivated material, keep provenance attached to each accession and record vegetative persistence, flowering, seed set and germination separately. Habitat seasonality can guide questions to test, but it cannot supply an exact substrate recipe, water depth or drying schedule without cultivation evidence.
Conservation context
The 2013 paper documented populations in several protected areas across the three states, including Flinders Chase and Lower Glenelg national parks and Arthur Pieman Conservation Area. Those historical records do not establish current population condition or a current statutory threat category. Conservation discussion.
Research checked 23 September 2026. Detailed synonymy, recognised infraspecific names, current conservation listings and cultivation protocols remain editorial checks. Text-only draft; image identity and rights require verification. No Nano Nursery stock availability is implied.
