Seeds of South Australia
Menkea crassa (Cruciferae)
Fat Spectacles
List of species for Menkea
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Seed collecting:
September to November
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
SUMMARY
Northern Flinders (FLB05)Flinders Lofty Block
 Near Threatened   [annual, grows on stony ground]
Gawler Lakes (GAW03)Gawler
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Torrens (GAW06) 
 Rare   (IUCN: RA d(ii))   [annual, grows on stony ground]
Commonwealth Hill (GAW08) 
 Rare   (IUCN: RA d(ii))   [annual, grows on stony ground]
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Dieri (SSD03)Simpson Strzelecki Dunefields
 Near Threatened   [annual, grows on stony ground]
Warriner (SSD04) 
 Near Threatened   [annual, grows on stony ground]
Strzelecki Desert (SSD05) 
 Near Threatened   [annual, grows on stony ground]
Breakaways (STP01)Stony Plains
 Near Threatened   [annual, grows on stony ground]
Oodnadatta (STP02) 
 Least Concern   [annual, grows on stony ground]
Murnpeowie (STP03) 
 Least Concern   [annual, grows on stony ground]
Peake-Dennison Inlier (STP04) 
 Least Concern   [annual, grows on stony ground]
Witjira (STP06) 
 Rare   (IUCN: RA d(ii))   [annual, grows on stony ground]
Baltana (STP07) 
 Least Concern   [annual, grows on stony ground]
Sturt Stony Desert (CHC02)Channel Country
 Near Threatened   [annual, grows on stony ground]
Diamantina-Eyre (CHC04) 
 Near Threatened   [annual, grows on stony ground]
Coongie (CHC06) 
 Least Concern   [annual, grows on stony ground]
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(ii))   [annual, grows on stony ground]
Everard Block (CER03) 
 Rare   (IUCN: RA d(ii))   [annual, grows on stony ground]
Pedirka (FIN04)Finke
 Rare   (IUCN: RA d(ii))   [annual, grows on stony ground]
IBRA regions
DISPLAY ALL
Northern Flinders (FLB05)Flinders Lofty BlockNear Threatened
  [annual, grows on stony ground]
5 of 8 subregionsGawlerRare
Maralinga (GVD03)Great Victoria DesertRare
  (IUCN: RA d(i,ii))   (Probable Decline)
3 of 4 subregionsSimpson Strzelecki DunefieldsNear Threatened
6 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsChannel CountryLeast Concern
, Near Threatened
2 of 3 subregionsCentral RangesRare
Pedirka (FIN04)FinkeRare
  (IUCN: RA d(ii))   [annual, grows on stony ground]
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. Crassa from the Latin 'crassus' meaning thick, fleshy; referring to its thick, fleshy leaves.
Distribution:
Found in the northern part of South Australia, growing  in a variety of habitat on sandy, often disturbed soils. Also found in the Northern Territory and Queensland.
Status:
Native. Common in South Australia. Uncommon in the other states.
Plant description:
Decumbent or prostrate herb with stems to 25 cm long, glabrous, stout, branching. Basal leaves linear to spathulate, entire, fleshy, glaucous, stem leaves reducing. Inflorescence an elongating spike with tiny  white, cream or yellow flowers. Flowering between June and October.
Fruit type:
Brown ellipsoid pod to 6.5 mm long and 3.6 mm wide, slightly compressed.
Seed type:
Dark brown ellipsoid seed to 0.6 mm long and 0.4 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 two collections, the seed viability were high, ranging from 80% to 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
390000 (7.65 g)
390000 (7.65 g)
100+22-Oct-2007MJT148
Lake Eyre
19-Sep-200880%-18°C
BGA85600 (2.74 g)20+5-Oct-2010TST1023
Lake Eyre
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.