Seeds of South Australia
Wahlenbergia gracilis (Campanulaceae)
Australian Bluebell
List of species for Wahlenbergia
Click on an image to enlarge it
Seed collecting:
October to February
Herbarium region:
Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))   [a few more records]
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU D2)   [limited habitat]
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [likes good soils; blackberries a threat]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [likes good soils ]
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 Wahlenbergia]
Name derivation:
Wahlenbergia named by H.A Schrader in honour of Georg Göran Wahlenberg (1780-1851), a Swedish professor of botany. Gracilis from Latin meaning slender; alluding to the species habit.
Distribution:
Found in the southern Mount Lofty Ranges and the lower South-east in South Australia, growing in shady grassy areas. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Uncommon in South Australia. Common in the other states.
Plant description:
Tufted perennial, few to many stems from a thickened taproot, smooth or with short hairs near base, stems erect, ascending or sprawling, to 80 cm long. Leaves alternate or opposite for a few pairs near base, obovate (usually near base) to linear (above), to 70 mm long and 10 mm wide, margins of broader leaves commonly with small callus-teeth, others usually entire. Flowers blue, sometimes pink or white, funnel-shaped with 5 narrowly triangular lobes. Flowering between September and January.
Fruit type:
Brown conical capsule to 7 mm long.
Seed type:
Tiny brown elliptic seed to 0.6 mm long and 0.2 mm wide, with fine striated surface.
Embryo type:
Spatulate under-developed.
Seed collecting:
Collect capsules that are maturing, drying and turning brown with brown seeds inside.
Seed cleaning:
Place the capsules in a tray and leave to dry for a week. Then rub the capsules gently with your hands 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 three collections, the seed viability were high, ranging from 90% to 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA3200 (0.3557 g)401-Dec-2006RJB70484B
Southern Lofty
1-Aug-2007100%-18°C
BGA31000 (0.36 g)5010-Nov-2007RJB75508
Southern Lofty
19-Sep-200890%-18°C
BGA74000 (1.88 g)20+18-Dec-2009KHB351
Southern Lofty
Jun-2010100%-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.