Seeds of South Australia
Crassula tetramera (Crassulaceae)
Common Crassula
List of species for Crassula
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Seed collecting:
October to December
Herbarium regions:
North Western, Lake Eyre, Flinders Ranges, Eyre Peninsula, Murray, South Eastern
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Fleurieu (KAN02)Kanmantoo
 Data Deficient   [comes up well after fire; lack of records, should be LC]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Data Deficient   [comes up well after fire; lack of records, should be LC]
Southern Flinders (FLB04) 
 Rare   (IUCN: RA d(i,ii))
Northern Flinders (FLB05) 
 Least Concern   [records missing due to taxo changes]
Central Flinders (FLB06) 
 Least Concern   [records missing due to taxo changes]
Talia (EYB04)Eyre Yorke Block
 Rare   (IUCN: RA d(ii))   [edge of range]
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))   [edge of range]
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Least Concern
Lowan Mallee (MDD04) 
 Least Concern   [no records]
Murray Scroll Belt (RIV06)Riverina
 Least Concern
Myall Plains (GAW01)Gawler
 Least Concern   [dry area species]
Gawler Volcanics (GAW02) 
 Least Concern   [dry area species]
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Torrens (GAW06) 
 Near Threatened   [records missing due to taxo changes]
Roxby (GAW07) 
 Least Concern   [records missing due to taxo changes]
Kintore (GVD04)Great Victoria Desert
 Least Concern   [records missing due to taxo changes]
Yellabinna (GVD06) 
 Least Concern   [dry area species]
Warriner (SSD04)Simpson Strzelecki Dunefields
 Near Threatened   [records missing due to taxo changes]
Strzelecki Desert (SSD05) 
 Near Threatened   [records missing due to taxo changes]
Breakaways (STP01)Stony Plains
 Near Threatened   [records missing due to taxo changes]
Oodnadatta (STP02) 
 Near Threatened   [records missing due to taxo changes]
Murnpeowie (STP03) 
 Near Threatened   [records missing due to taxo changes]
Witjira (STP06) 
 Near Threatened   [records missing due to taxo changes]
Baltana (STP07) 
 Least Concern   [records missing due to taxo changes]
Coongie (CHC06)Channel Country
 Near Threatened   [records missing due to taxo changes]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern   [records missing due to taxo changes]
Watarru (CER02) 
 Least Concern   [records missing due to taxo changes]
Everard Block (CER03) 
 Least Concern   [records missing due to taxo changes]
IBRA regions
DISPLAY ALL
Fleurieu (KAN02)KanmantooData Deficient
  [comes up well after fire; lack of records, should be LC]
4 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
, Data Deficient
2 of 5 subregionsEyre Yorke BlockRare
3 of 6 subregionsMurray Darling DepressionLeast Concern
Murray Scroll Belt (RIV06)RiverinaLeast Concern
6 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
2 of 4 subregionsGreat Victoria DesertLeast Concern
2 of 4 subregionsSimpson Strzelecki DunefieldsNear Threatened
5 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
Coongie (CHC06)Channel CountryNear Threatened
  [records missing due to taxo changes]
3 of 3 subregionsCentral RangesLeast Concern
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. Tetramera meaning having flower parts in sets of four.
Distribution:
Found across most part of South Australia. Also found in all states.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Annual forb, sprawling to prostrate with succulent branches to 15 cm long. Leaves opposite each other, usually with a sheath at the base, to 0.32 cm long and less than 1 mm wide, flat and very narrow, surface hairless, edges finely warty at least towards the tips, tips rounded.  Flowers tiny with four petals, in clusters of 3-12 at the bases of the leaves.
Fruit type:
Small capsules in clusters along the stems.
Seed type:
Brown ovoid seed to 0.4 mm long and 0.2 mm wide, with a smooth 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 one collection, the seed viability was high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA62800 (1.03 g)501-Oct-2007RJB74969
South Eastern
19-Sep-2008100%-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.