Seeds of South Australia
Amphibromus recurvatus (Gramineae)
Dark Swamp Wallaby-grass
List of species for Amphibromus
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Seed collecting:
November to February
Herbarium regions:
Kangaroo Island, South Eastern
NRM regions:
Kangaroo Island, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Vulnerable   (IUCN: VU D2)   [very limited habitat; in all NF reserves; drying a threat]
Bridgewater (NCP01)Naracoorte Coastal Plain
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [edge of range; salinity a threat]
Glenelg Plain (NCP02) 
 Vulnerable   (IUCN: VU D2)   [very limited habitat; drying a threat]
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [could be EN; could be declining]
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 double and 'bromus' a grass genus, referring to the spikelets resembling those of the genus Bromus. Recurvatus from the Latin 'recurvare' meaning to bend back, referring to the spikelets with spreading or reflexed awns.
Found in a few sites on Kangaroo Island and the lower South-east, growing in damp areas such as lagoons, waterholes and swamps. Also found in Victoria and Tasmania.
Native. Rare in South Australia. Common in the other States.
Plant description:
Erect perennial grass to 1.5 m tall with leaf blades to 30 cm long and 3 mm wide, more or less glabrous below, scabrous above. Panicle erect, frequently purple-tinged to 20 cm long. Spikelets to 11 mm long, with 4-6 bisexual florets. Glumes subequal, more or less glabrous, frequently tinged with purple. Flowering between November and January.
Fruit type:
Lemma densely hairy, to 5.2 mm long with apex 4-toothed; teeth more or less equal, 0.43-1 mm long with purple veins extending to the teeth. Awn arising 34-45 (rarely 50)% of the lemma length from the a tip, bent, scarcely twisted;, hairy 9.7-18 mm long, pale-brown to purple-brown.
Seed type:
Yellow-brown grain to 3mm long.
Embryo type:
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 two collections, the seed viability was low to high, ranging from 10% to 75%. This may reflect the collecting or cleaning process.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
15000 (9.8 g)
15000 (9.8 g)
South Eastern
1-Aug-200710%+5°C, -18°C
BGA7000 (31.29 g)5021-Dec-2007RJB76663
South Eastern
19-Sep-200875%+5°C, -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.