Seeds of South Australia
Menkea villosula (Cruciferae)
List of species for Menkea
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Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
Kingoonya (GAW05)Gawler
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Commonwealth Hill (GAW08) 
 Near Threatened   [edge of range ]
Kintore (GVD04)Great Victoria Desert
 Near Threatened   [grows on red soils]
Tallaringa (GVD05) 
 Rare   (IUCN: RA d(ii))   [grows on red soils]
Breakaways (STP01)Stony Plains
 Least Concern   [grows on red soils]
Oodnadatta (STP02) 
 Near Threatened   [grows on red soils]
Baltana (STP07) 
 Rare   (IUCN: RA d(ii))   [limited habitat]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern   [grows on red soils]
Everard Block (CER03) 
 Least Concern   [grows on red soils]
Tieyon (FIN03)Finke
 Least Concern   [grows on red soils]
Pedirka (FIN04) 
 Near Threatened   [grows on red 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 Menkea]
Name derivation:
Menkea named after Karl Theodor Menke (1791-1861), a German malacologist, physician and botanist.Villosula from Latin meaning slightly hairy (diminutive of 'villosus').
Distribution:
Found in the north-western part of South Australia, growing on red sandy, clayey & loamy soils. Also found in Western Australia and the Northern Territory.
Status:
Native. Common in South Australia. Common in the other states.
Seed type:
Dark brown ellipsoid seed to 0.6 mm long and 0.5 mm wide, with a slight wrinkled surface.
Embryo type:
Bent.
Seed collecting:
Collect maturing pods those turning pale brown with hard seeds inside. Be gentle with the pods as they split open easily.
Seed cleaning:
Place the pods in a tray and cover with paper to prevent seeds from popping out and leave to dry for a week. Then rub the dried pods 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:
From one collection, the seed viability was high, at 100%.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Jun-17100%714 500 mg/L gibberellic acid for 24 h;
1% agar;
Incubated under winter conditions
Jun-1790%714 500 mg/L gibberellic acid for 24 h;
1% agar;
Incubated under spring/autumn conditions
Jun-176%7NA seeds leached in water for 24 h;
1% agar;
Incubated under winter conditions
Jun-170%NANA seeds leached in water for 24 h;
1% 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)