Seeds of South Australia
Lasiopetalum baueri (Sterculiaceae)
Slender Velvet-bush
List of species for Lasiopetalum
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Seed collecting:
October to December
Herbarium regions:
Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Lucindale (NCP03) 
 Near Threatened
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [not often seen; Torrens Gorge stronghold]
Broughton (FLB02) 
 Rare   (IUCN: RA d(ii))   [roadsides & remnants]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
St Vincent (EYB02) 
 Least Concern
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Lowan Mallee (MDD04) 
 Least Concern
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(i,ii))
Yellabinna (GVD06)Great Victoria Desert
 Near Threatened
IBRA regions
DISPLAY ALL
3 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Near Threatened
, Rare
2 of 2 subregionsKanmantooLeast Concern
, Rare
2 of 6 subregionsFlinders Lofty BlockRare
5 of 5 subregionsEyre Yorke BlockLeast Concern
3 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
Myall Plains (GAW01)GawlerRare
  (IUCN: RA d(i,ii))
Yellabinna (GVD06)Great Victoria DesertNear Threatened
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 Lasiopetalum]
Name derivation:
Lasiopetalum from the Greek 'lasios' meaning hairy or shaggy and 'petalon' meaning petal; alluding to the hairy calyx. Baueri named after Franz and Ferdinand Bauer, 19th century Austrian botanical artists and brothers.
Distribution:
Found in the southern part of South Australia, growing on red sands associated with mallee communities. Also found in New South Wales, Victoria and Tasmania.
Status:
Native. Common in SA. Uncommon in New South Wales and Tasmania. Common in Victoria.
Plant description:
Shrubs to 1.5 m high but often under 50 cm. Leaves stiff, linear to linear-oblong, obtuse, to 50 mm long and 7 mm wide. Inflorescence lax, usually with fewer than 6 flowers, calyx pink or white, greenish towards the base, petals reddish-brown, less than 1 mm long. Flowering between August and October.
Fruit type:
Brown segmented capsule to 8 mm diameter.
Seed type:
Dark brown, oblong seeds covered to 2.5 mm long and 1.5 mm wide, with fine hairs and an inverted U shaped aril attached to the top.
Embryo type:
Spatulate.
Seed collecting:
Collect capsules when they are brown and beginning to dry. Rub the fruits to check that the dark seeds are present. Look out for holes in the fruits as this is an indication that the seed has been predated.
Seed cleaning:
Place the capsules in a tray and leave to dry for two weeks. Then rub the capsules gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. 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:
Seed predation can be high and seed viability can be low.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA990 (1.55 g)2618-Dec-2003PJA 71
Murray
14-Aug-200640%-18°C
BGA1300 (1.8256 g)7-Nov-2013JRG79
Murray
24-Mar-201565%-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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
November 2014100%10d10d Seed coat nicked
1% water agar
Incubated under winter conditions
July 201484%14d21d Seed coat nicked
1% water agar
Incubated under winter conditions
July 201472%14d36d Seed coat nicked
1% water agar
Incubated under spring/autumn conditions
June 20152%74dNA None
1% water agar
Incubated under winter conditions
June 20152%63dNA None
1% water agar
Incubated under spring/autumn conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)