Seeds of South Australia
Utricularia australis (Lentibulariaceae)
Yellow Bladderwort
List of species for Utricularia
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Seed collecting:
January to March
Herbarium regions:
Flinders Ranges, Northern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South Australian Arid Lands, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [undercollected; overlooked]
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [undercollected; overlooked]
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [undercollected; overlooked]
Southern Flinders (FLB04)Flinders Lofty Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [water quality/quantity issues]
Central Flinders (FLB06) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [climate sensitive; in Sliding Rock rock pool, Wilpena]
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. Australis means of or from the south; referring to the distribution of the species in the southern hemisphere.
Found mainly in the lower South-east in South Australia, with a few collection from the northern Flinders Ranges and northern Mount Lofty Ranges, growing in still slowly flowing water. Also found in all states and New Zealand, New Guinea, Asia, Europe and Africa.
Native. Rare in South Australia. rare in Western Australia, Northern territory and Tasmania. Common in the other states.
Plant description:
Suspended aquatic perennial with branched stolons to 50 cm long. Leaves alternate to 4 cm long, divided from base into 2 equal capillary segments, these again repeatedly divided. Traps ovoid to 2.5 mm long. Inflorescence erect above water, 30 cm long with 4 to 10 yellow with reddish-brown lines and spots on lower lip flowers. Flowering between December and April.
Fruit type:
Brown globular capsules.
Seed type:
Tiny brown ovoid capsule to 0.5 mm long and 0.3 mm wide, with a thin mesh-like covering.
Seed collecting:
Collect mature capsules, those turning brown, fat and containing brown seeds. Capsule are very difficult to find unless plants are marked when in flowers.
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.