Seeds of South Australia
Crassula sieberiana (Crassulaceae)
Australian Stonecrop
List of species for Crassula
Click on an image to enlarge it
Seed collecting:
October to February
Herbarium region:
Southern Lofty
NRM region:
Adelaide and Mount Lofty Ranges
IBRA region
Fleurieu (KAN02)Kanmantoo
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [Hindmarsh Falls - declining; Finniss River - stable; threatened by floods, traffic, weeds]
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 Crassula]
Name derivation:
Crassula the diminutive of the Latin 'crassus' meaning thick; alluding to the fleshy leaves and branches. Sieberiana named after Franz Wilhelm Sieber (1789-1844), a Bohemian botanist and collector who travelled to Europe, the Middle East, South Africa and Australia.
Distribution:
Found only in the southern Mount Lofty Ranges in South Australia, growing on rock ledges and in crevices, and on seasonally inundated ground. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Very rare in South Australia. Common in the other states.
Plant description:
Tiny erect herb to ankle high with succulent, paired leaves. Flowers white or pink, small, fleshy, usually one flower per group on a long thin stalk. Flowers in spring and summer.
Fruit type:
Small red-brown capsules in clusters along the stems.
Seed type:
Brown ellipsoid seed to 0.6 mm long and 0.2 mm wide, with a tuberculate surface. 
Seed collecting:
Collect whole plants that are drying off, turning red-brown with mature fruit-spikes. These will contain very small brown seeds when rubbed with your fingers.
Seed cleaning:
Place the plants in a tray and leave to dry for two weeks. Then rub the plants gently by hand or with a rubber bung to dislodge the seeds. Use a sieve to separate the unwanted material. Be very 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, ranging from 85% to 95%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA91000 (1.1 g)50+23-Jan-2008DJD1046
Southern Lofty
19-Sep-200885%+5°C, -18°C
BGA68000 (0.99 g)1023-Oct-2007RJB75032
Southern Lofty
19-Sep-200895%+5°C, -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.