Seeds of South Australia
Austrostipa densiflora (Gramineae)
Dense Spear-grass
List of species for Austrostipa
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Seed collecting:
October to March
Herbarium regions:
Flinders Ranges, Murray, Southern Lofty, Kangaroo Island
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   [can regenerate readily; likes rocky outcrops]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   [can regenerate readily; likes rocky outcrops]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [not real common; could be declining in some central areas; can regenerate readily; likes rocky outcrops]
Broughton (FLB02) 
 Rare   (IUCN: RA d(ii))
Southern Flinders (FLB04) 
 Rare   (IUCN: RA d(ii))
Central Flinders (FLB06) 
 Vulnerable   (IUCN: VU D2)
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [unusual record]
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. Densiflora from the Latin 'densus' meaning dense and 'florus' meaning flower; referring to its congested inflorescences.
Distribution:
Found in the Flinders Ranges, southern Mount Lofty Ranges and Kangaroo Island, growing in rocky site on sandy, shallow rock or low-fertility soils. Also found in Queensland, New South Wales and Victoria.  
Status:
Native. Rare in South Australia. Rare in Queensland. Common in the other states.
Plant description:
Tufted perennial grass to 1.5 m with culms unbranched and nodes densely hair. Leaves hairy above, inrolled to flat, to 45 cm long and 5 mm wide with a dense hairy ear-shaped lobe. Inflorescence a compact and dense panicle to 30 cm long with pubescent, purplish or green glumes. Flowering between October and January.

Key to this species: awn twice bent with no coma (no hairs around the lemma apex), lemma short stout (5-7.5 mm) with brown tuberculate surface, column hairs long pubescent and not confined to the nerve (0.5-1 mm), glume pubescent, callus short 1.2-1.8 mm, awn short 35-45 mm, panicle dense compact, sheath stout base densely pubescent 1.5-8 mm, leaves hairy above long to 45 cm with dense hairy auricles, rocky sites

Fruit type:
Brown narrow ellipsoid lemma to 7.5 mm long with a tuberculate surface covered in white or golden hairs but lacking in the apex area, callus straight, sharp and short to 1.8 mm long, awn twice bent, short to 45 mm long, column plumose with hairs to 1 mm long, palea about equal to lemma with a line of hairs down the centre.
Seed type:
Yellow-brown fat grain to 3 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 golden 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 two collections, the seed viability were average, ranging from 55% to 80%. 
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA15600 (40.56 g)5014-Oct-2007RJB75491
Northern Lofty
19-Sep-200855%+5°C, -18°C
BGA1000 (3.95 g)50+18-Jan-2011TST1130
Southern Lofty
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.