Seeds of South Australia
Amphibromus macrorhinus (Gramineae)
Long-nosed Swamp Wallaby-grass
List of species for Amphibromus
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Seed collecting:
October to December
Herbarium regions:
Eyre Peninsula, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, South East
IBRA regions
Bridgewater (NCP01)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [threats: loss & quality of habitat]
Glenelg Plain (NCP02) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [threats: loss & quality of habitat]
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [threats: loss & quality of habitat]
Fleurieu (KAN02)Kanmantoo
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [dependent on freshwater habitat; changes in hydrology a threat; not seen recently]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [dependent on freshwater habitat; changes in hydrology a threat]
Eyre Hills (EYB03)Eyre Yorke Block
 Critically Endangered   (IUCN: CR B1ab(i,ii,iii,iv))   (Definite Decline)   [needs water, restricted habitat, climate change & salinity a threat]
Eyre Mallee (EYB05) 
 Critically Endangered   (IUCN: CR B1ab(i,ii,iii,iv))   (Definite Decline)   [needs water, restricted habitat, climate change & salinity a threat]
Lowan Mallee (MDD04)Murray Darling Depression
 Endangered   (IUCN: EN B2ab(i,ii,iii,iv))   (Definite Decline)   [Threats: drought, irrigation, water harvesting, changed hydrology. Needs fresh standing water; highly restricted]
Wimmera (MDD05) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [threats: loss & quality of habitat, changed water regime - irrigation, dams, water harvesting]
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 Amphibromus]
Name derivation:
Amphibromus from the Greek 'amphi' meaning about and 'bromus' a grass genus; near the genus Bromus. Macrorhinus  from the Greek 'makros' meaning large and 'rhis' meaning nose; referring to the drawn out apex of the lemma.
Distribution:
Found in permanent or temporarily damp areas on clay, sand or sandy loams on Eyre Peninsula, Mount Lofty Ranges and the lower Southeast. Also found in Western Australia, New South wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Rare in Western Australia and Tasmania. Common in other states.
Plant description:
Erect, perennial grass to 1m tall with leaf blades to 25 cm long and 4 mm wide, glabrous to scabrous. Panicle erect, contracted to open, to 40 cm long spikelets 10-17 mm long, with 4 or 5 bisexual florets; glumes unequal to subequal;
Fruit type:
Lemma very roughly papillose, the papillae concentrated on the lower half, less dense and concentrated along the nerves towards the apex, 5.3-7.9 mm long, apex 4-toothed, the inner teeth 0.5-1.15 mm long, the outer teeth shorter, the nerves usually stopping short of the tooth apex; awn arising 50-60% of the lemma length from the tip, bent, slightly to moderately twisted, scabrous, 10-19 mm long, pale-green to a darker brown.
Seed type:
Yellow-brown grain to 2 mm long.
Embryo type:
Lateral.
Seed collecting:
Use hands to gently strip seeds off the mature seed spike that are turning straw colour. Mature seeds will come off easily. Alternatively, you can break off the whole seed spike.
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:
From one collection, the seed viability was high, at 75%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA3400 (5.42 g)100+11-Nov-2009DJD1783
South Eastern
Jun-201075%-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.