Seeds of South Australia
Austrostipa gibbosa (Gramineae)
Spurred Spear-grass
List of species for Austrostipa
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Seed collecting:
November to March
Herbarium regions:
Flinders Ranges, Northern Lofty, Murray, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
Lucindale (NCP03)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [one record; localised]
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [limited habitat; needs more survey work]
Fleurieu (KAN02) 
 Vulnerable   (IUCN: VU D2)   [confused with A setacea]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grassy woodland sp; threatened by urbanisation, grazing]
Broughton (FLB02) 
 Near Threatened
Southern Flinders (FLB04) 
 Rare   (IUCN: RA d(i))
St Vincent (EYB02)Eyre Yorke Block
 Critically Endangered   (IUCN: CR B2ac(ii,iii))   (Definite Decline)
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
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. Gibbosa from the Latin 'gibba' meaning swollen and suffix '-osus' indicating abundance; referring to its swollen asymmetrical lemma. ​
Distribution:
Found in the southern Flinders Ranges, Mount Lofty Ranges and the South-east in South Australia, growing on rich loamy soil along creeks and seasonally wet areas in woodland and grassland. Also found in New South Wales and Victoria.
Status:
Native. Rare in South Australia. Common in the other states.
Plant description:
Tufted perennial grass to 1.5 m high with culms unbranched and pubescent nodes. Leaves glabrous or sparsely pubescent, sometimes scabrous with blade flat, channelled or inrolled to 30 cm long and 5 mm wide. Inflorescence an open panicle to 40 cm long with bulging green glumes. Flowering between October and January.

Key to this species: awn twice bent with coma, panicle open with long spreading branches, glumes inflated, callus short hooked, lemma with a assymetric bulge (dorsal hump) short 4.5-6.6 mm, awn short, column bent at angle from top of lemma

Fruit type:
Deep reddish brown to almost black, short lemma to 6.5 mm long with a swollen asymmetric hump near the apex and a granular tuberculate surface lightly covered with white to golden hairs, coma to 2 mm long, callus short hooked to 1.5 mm long, awn short, eccentric and twice bent to 50 mm long, column bent at an angle from the top of the lemma, palea glabrous about equal to lemma.
Seed type:
Yellow-brown fat grain to 3.5 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 viable, depending on time of seed collections and seasonal conditions. From one collection, the seed viability was average, at 65%. 
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
2100 (9.08 g)
2100 (9.08 g)
100+26-Nov-2010DJD2058
Southern Lofty
1-Jan-201265%-18°C
BGA1850 (13.33 g)50+25-Nov-2010DJD2056
Murray
1-Jan-201285%-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.