Seeds of South Australia
Lobelia rhombifolia (Campanulaceae)
Tufted Lobelia
List of species for Lobelia
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Seed collecting:
October to February
Herbarium regions:
Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)   [(no records) T Horn has records]
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))
Kangaroo Island (KAN01)Kanmantoo
 Least Concern   [fluctuates; fire responsive]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   [fluctuates; fire responsive; limited range]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [fluctuates; fire responsive; limited range]
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 Lobelia]
Name derivation:
Lobelia named after Mathias de Lobel (1538-1616), physician to William of Orange and then botanist to James I of England. Rhombifolia from the Latin 'rhombicus' meaning a rhomb (diamond shape) and 'folium' meaning a leaf; referring to the species diamond-shaped leaves.
Distribution:
Found on Kangaroo Island, southern Mount Lofty Ranges and in the upper South-east in South Australia, growing on sandy or gravelly sites, often common after fires. Also found in Western Australia, Victoria and Tasmania.
Status:
Native. Uncommon in South Australia. Rare in Tasmania. Common in the other states.
Plant description:
Annual herbs to 20 cm high, with a tap root and usually with several branches from the base. Leaves broadly obovate to rhombic-obovate with a cuneate base and few often rounded teeth at the base of the plant becoming oblanceolate to linear-elliptic, with coarse distant serrations, to 15 mm long and 12 mm wide, glabrous. Flowers on long stalk to 10 cm long from leaf-like bracts, with blue flowers, lobes oblong-triangular, the tube paler blue than the lobes and split along the upper side, the upper 2 lobes recurved and glabrous, the lower median lobe oblanceolate, blue with a yellow spot in front of the throat and longer than the similar 2 lateral lobes. Flowering between October and February.
Fruit type:
Brown obovoid capsule to 8 mm long.
Seed type:
Orange to brown ellipsoid seed to 0.3 mm long and 0.2 mm wide, smooth surface.
Embryo type:
Linear under-developed.
Seed collecting:
Collect mature capsules, those that are fat, turning a pale straw colour and contain orange seeds.
Seed cleaning:
Place the capsules in a tray and leave to dry for one weeks. Then rub the capsules gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Be careful as the seeds are very small. 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 two collections, the seed viability were average to high, ranging from 55% to 90%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
107500 (0.77 g)
107500 (0.77 g)
50+31-Oct-2006DJD638
Southern Lofty
1-Aug-200790%-18°C
BGA23200 (0.27 g)4030-Oct-2007RJB75635
South Eastern
19-Sep-200855%-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.