Plants of
South Australia
Utricularia violacea
Lentibulariaceae
Violet Bladderwort
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
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Oodnadatta
Renmark
Wudinna
Keith
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Botanical art

Kath Alcock paintings: 4.

Etymology

Utricularia from the Latin 'utriculus' meaning a small bottle or bladder; referring to a small insect trapping sac attached to the underground leaves. Violacea from Latin meaning violet colour; referring to the colour of the flowers.

Distribution and status

Found only in the lower South-east in South Australia, growing in wet heaths and swamps. Also found in Western Australia, Victoria and Tasmania. Native. Rare in South Australia. Rare in Victoria and Tasmania. Common in Western Australia.
Herbarium region: South Eastern
NRM region: South East
AVH map: SA distribution map (external link)

Plant description

Tiny terrestrial annual herb. Leaves numerous, rosetted, narrowly linear-cuneate, to 12 mm long and 0.5 mm wide. Inflorescence 1-4 erect spike to 10 cm long with 1 violet flower each, centre of lower lip pale yellow with 3 dark violet lines, upper lip obovate, bilobed, lower lip much larger, transversely oblong or elliptic. Flowering between October and November. Fruits are purple brown globular capsule to 2 mm diameter. Seeds are tiny brown ellipsoid seed to 0.4 mm long and 0.2 mm wide, with a thin mesh-like surface.

Seed collection and propagation

Collect seeds between November and January. Collect mature capsules, those turning reddish brown colour, fat and containing brown seeds. Can collect individual capsules or break off the whole stem. Place the capsules in a tray and leave to dry for two weeks. Then rub the capsules gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place. From one collection, the seed viability was high, at 100%.

Seeds stored:
  Hide
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
 
MSB

13,000 (0.24 g)
5023-Nov-2007RJB75917
South Eastern
100%
BGA15,000 (0.08 g)100+17-Nov-2010DJD2024
South Eastern
1-Jan-2012100%-18°C
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.