Seeds of South Australia
Isoetopsis graminifolia (Compositae)
Grass Buttons
List of species for Isoetopsis
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Seed collecting:
September to December
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [grassy ecosystem sp, likes drier areas; localised on northern coast; limited habitat; P Lang considers Rare]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   [undercollected; grassy ecosystem sp, likes drier areas; edge of range]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [undercollected; grassy ecosystem sp, likes drier areas; edge of range]
Broughton (FLB02) 
 Least Concern
Olary Spur (FLB03) 
 Least Concern
Southern Flinders (FLB04) 
 Least Concern
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
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
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Least Concern
Wimmera (MDD05) 
 Data Deficient   [checked by H Vonow, could be miss ID]
Braemer (MDD07) 
 Least Concern
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(ii))
Myall Plains (GAW01)Gawler
 Least Concern
Gawler Volcanics (GAW02) 
 Least Concern
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Least Concern
Roxby (GAW07) 
 Rare   (IUCN: RA d(i,ii))
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Kintore (GVD04) 
 Rare   (IUCN: RA d(i,ii))   [outlier]
Yellabinna (GVD06) 
 Least Concern
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Yalata (NUL03) 
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Least Concern
Bimbowrie (BHC05) 
 Least Concern
Curnamona (BHC06) 
 Least Concern
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(i,ii))   [outlier]
IBRA regions
DISPLAY ALL
2 of 2 subregionsKanmantooRare
, Vulnerable
6 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
5 of 5 subregionsEyre Yorke BlockLeast Concern
4 of 6 subregionsMurray Darling DepressionLeast Concern
, Data Deficient
Murray Scroll Belt (RIV06)RiverinaRare
  (IUCN: RA d(ii))
5 of 8 subregionsGawlerLeast Concern
, Rare
3 of 4 subregionsGreat Victoria DesertLeast Concern
, Rare
2 of 3 subregionsNullarborLeast Concern
3 of 4 subregionsBroken Hill ComplexLeast Concern
Oodnadatta (STP02)Stony PlainsRare
  (IUCN: RA d(i,ii))   [outlier]
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 Isoetopsis]
Name derivation:
Isoetopsis means resembling the genus Isoetes (genus name from the Greek 'isos' meaning ever and 'etas' meaning green); alluding to the habit resembling that of IsoetesGraminifolia  from the Latin 'gramen' meaning grass and 'folium' meaning a leaf; alluding to the grass-like appearance of the species.
Distribution:
Found mainly in the central part of South Australia, growing on sandy to loamy soil in mallee, shrubland, dunes, pastures and woodland. Also found in all states.
Status:
Native. Common in South Australia. rare in the Northern territory and Tasmania. Common in the other states.
Plant description:
Grass like annual herb to  5 cm tall with no stem. Leaves somewhat succulent, clustered at the base of the plant, to 50 mm long and 2 mm wide, flattened cylindrical, hairy when young, then hairless, with pointed tips. Flower-heads elliptical or hemispherical, crowded among the leaves at the base of the plant with tiny greenish to pale flowers with no petal. Flowering between July and October.
Fruit type:
Dense pale brown head.
Embryo type:
Spatulate.
Seed collecting:
Collectwhole plants that are brown or turning brown. Each head should have numerous tiny seeds.
Seed cleaning:
Place the heads in a tray for a week to dry. Then rub the heads gently with your hands to dislodge the seeds. Use a fine sieve to separate the seeds from the unwanted material. The seeds are tiny dark brown and ovoid in shape. 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 germination:
Seeds are non-dormant, viable seed should germinate readily.