Seeds of South Australia
Utricularia violacea (Lentibulariaceae)
Violet Bladderwort
List of species for Utricularia
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Seed collecting:
November to January
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Lowan Mallee (MDD04)Murray Darling Depression
 Vulnerable   (IUCN: VU D2)   [edge of range; needs water]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Utricularia]
Name derivation:
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:
Found only in the lower South-east in South Australia, growing in wet heaths and swamps. Also found in Western Australia, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Rare in Victoria and Tasmania. Common in Western Australia.
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.
Fruit type:
Purple brown globular capsule to 2 mm diameter.
Seed type:
Tiny brown ellipsoid seed to 0.4 mm long and 0.2 mm wide, with a thin mesh-like surface.
Seed collecting:
Collect mature capsules, those turning reddish brown colour, fat and containing brown seeds. Can collect individual capsules or break off the whole stem.
Seed cleaning:
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.
Seed viability:
From one collection, the seed viability was high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA15000 (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.