Seeds of South Australia
Wahlenbergia gymnoclada (Campanulaceae)
Naked Bluebell
List of species for Wahlenbergia
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Seed collecting:
November to January
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))
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. Gymnoclada from the Greek 'gymnos' meaning bare or naked and 'clados' meaning branch, referring to the stems which are usually leafless in upper half.
Distribution:
Found only in the lower South-east in South Australia, growing in light forest or heathland on sandy soils. Also found in New South Wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Rare in New South Wales. Common in the other states.
Plant description:
Perennial herbs with a fleshy rootstock and spreading rhizomes with stems simple or occasionally branching, smooth or with short hairs near base, erect, to 60 cm high, usually leafless in upper half. Leaves opposite near base, becoming alternate, narrowly obovate to linear, to 50 mm long and 3.5 mm wide, margins thickened, usually with a few, distant callus-teeth. Flowers blue, sometimes yellowish outside, funnel-shaped with 5 narrowly triangular lobes. Flowering between September and November.
Fruit type:
Brown ovoid capsule to 9 mm long and 4 mm wide
Seed type:
Tiny brown elliptic seed to 0.7 mm long and 0.4 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 two collections, the seed viability were high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA2000 (0.11 g)25+9-Dec-2009MJT268
South Eastern
Jun-2010100%-18°C
BGA8950 (0.2687 g)30+22-Dec-2010DJD2095
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.