Seeds of South Australia
Austrostipa semibarbata (Gramineae)
Fibrous Spear-grass
List of species for Austrostipa
Click on an image to enlarge it
Seed collecting:
November to February
Herbarium regions:
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
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Lucindale (NCP03) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   [not well-protected]
Fleurieu (KAN02) 
 Least Concern
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Broughton (FLB02) 
 Least Concern
Southern Flinders (FLB04) 
 Least Concern
Southern Yorke (EYB01)Eyre Yorke Block
 Data Deficient   [outlier?]
St Vincent (EYB02) 
 Data Deficient
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [edge of range]
Lowan Mallee (MDD04) 
 Rare   (IUCN: RA d(i,ii))   [unlikely species; edge of range]
Wimmera (MDD05) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
IBRA regions
DISPLAY ALL
3 of 4 subregionsNaracoorte Coastal PlainRare
2 of 2 subregionsKanmantooLeast Concern
, Rare
3 of 6 subregionsFlinders Lofty BlockLeast Concern
4 of 5 subregionsEyre Yorke BlockRare
, Data Deficient
4 of 6 subregionsMurray Darling DepressionRare
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 Austrostipa]
Name derivation:
Austrostipa from the Latin 'auster' meaning south and the genus Stipa, referring to the genus being allied to Stipa but restricted to Australia. Semibarbata from the Latin 'semi' meaning half and 'barba' meaning beard, referring to its hairy awn column but only minutely rough bristle.
Distribution:
Found in the southern part of South Australia, growing on sandy to clay loam or laterite soils in sclerophyll forest, open woodland and heath. Also found in Western Australia, New South Wales, Victoria and Tasmania.
Status:
Native. Common in South Australia. Uncommon in New South Wales. Common in the other states.
Plant description:
Tufted perennial grass to 1.2 m high with culms unbranched and nodes pubescent. Leaves usually glabrous, sometimes scabrous with blade inrolled to involute, to 30 cm long and 3 mm wide. Inflorescence a loosely contracted panicle to 35 cm long with glabrous straw-coloured glumes to 27 mm long. Flowering between October to December.

Key to this species: awn twice bent with no coma (no hairs around the lemma apex); awn long 70-110 mm; awn hairs not confined to the nerve, 0.3-1 mm long; glumes glabrous; leaves scabrous or glabrous; lemma long 9-11.5 mm

Fruit type:
Pale- brown to black linear- ellipsoid lemma to 11.5 mm long, with fine granular surface and covered in white to yellowish hairs except towards the apex; no coma; callus 3.5 mm long; awn twice bent, to 110 mm long with awn hairs not confined to the nerve; an evenly pubescent column; palea about equal to lemma, with a line of hairs down the centre. 
Seed type:
Yellow-brown narrow-ellipsoid grain to 5 mm long within the lemma.
Embryo type:
Lateral.
Seed collecting:
Use your hands to gently strip the seeds (lemma) off the mature fruiting spike, those that are turning brown. Mature seeds will come off easily compare to the immature seeds that remain on the spike. Alternatively, you can break off the whole fruit spike to allow some of the seeds to mature further.
Seed cleaning:
Place the seeds/spike in a tray and leave to dry for two weeks. No further cleaning is required if only seed collected. If seed spikes collected, use hand to strip off the mature seeds. 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:
Viability of grass seeds could be very variable, depending on time of seed collections and seasonal conditions.