Seeds of South Australia
Phlegmatospermum cochlearinum (Cruciferae)
Downy Cress
List of species for Phlegmatospermum
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Seed collecting:
September to November
Herbarium regions:
Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Rare   (IUCN: RA d(i))
Northern Flinders (FLB05) 
 Near Threatened   [forms large patches]
Central Flinders (FLB06) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [annual, weeds a threat; could be extinct]
Eyre Mallee (EYB05)Eyre Yorke Block
 Rare   (IUCN: RA d(i,ii))
Braemer (MDD07)Murray Darling Depression
 Rare   (IUCN: RA d(i))
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(i,ii))
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(i,ii))
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(i,ii))
Torrens (GAW06) 
 Near Threatened
Roxby (GAW07) 
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Yalata (NUL03) 
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Rare   (IUCN: RA d(i))
Barrier Range Outwash (BHC04) 
 Rare   (IUCN: RA d(i))
Bimbowrie (BHC05) 
 Rare   (IUCN: RA d(i))
Curnamona (BHC06) 
 Rare   (IUCN: RA d(i))
Strzelecki Desert (SSD05)Simpson Strzelecki Dunefields
 Least Concern
Breakaways (STP01)Stony Plains
 Rare   (IUCN: RA d(i,ii))
Oodnadatta (STP02) 
 Near Threatened
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Near Threatened
Witjira (STP06) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Baltana (STP07) 
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Near Threatened
Coongie (CHC06) 
 Near Threatened
IBRA regions
DISPLAY ALL
3 of 6 subregionsFlinders Lofty BlockNear Threatened
, Rare
, Endangered
Eyre Mallee (EYB05)Eyre Yorke BlockRare
  (IUCN: RA d(i,ii))
Braemer (MDD07)Murray Darling DepressionRare
  (IUCN: RA d(i))
5 of 8 subregionsGawlerNear Threatened
, Rare
Yellabinna (GVD06)Great Victoria DesertRare
  (IUCN: RA d(i,ii))
2 of 3 subregionsNullarborLeast Concern
4 of 4 subregionsBroken Hill ComplexRare
Strzelecki Desert (SSD05)Simpson Strzelecki DunefieldsLeast Concern
6 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
, Rare
2 of 4 subregionsChannel CountryNear 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 Phlegmatospermum]
Name derivation:
Phlegmatospermum from the Greek 'phlegma' meaning inflammation and 'sperma' meaning a seed; referring to the mucous seeds. Cochlearinum from the Latin 'cochlearis" meaning a spoon; referring to the spoon-shaped fruit pod.
Distribution:
Found on the Nullarbor and in the north-eastern part of South Australia, growing on loam and clay in wet depressions.. Also found in Western Australia and New South Wales.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Erect annual herb to 35 cm high, covered in appressed hairs. Basal leaves in a rosette, elliptic to narrow-obovate, to 9 cm long, entire to toothed, stem leaves reducing. Inflorescence an elongated spike with white or yellow flowers. Flowering between July and September.
Fruit type:
Brown spoon-shaped pod to 10 mm long, slightly winged and notched,  hairs lying parallel with long axis of fruit.
Seed type:
Orange reniform seed to 2 mm long and 1.5 mm wide, with very fine tuberculates.
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
7700 (11.89 g)
7700 (11.89 g)
50+25-Sep-2007DJD855
Lake Eyre
19-Sep-2008100%-18°C
BGA6200 (7.11 g)20+5-Oct-2010DJD1937
Lake Eyre
1-Jan-201280%-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.