Long-spurred Arrowgrass,
Spurred Arrowgrass
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Regional Species Conservation Assessments per IBRA subregion.


Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
Display IBRA region text
Central Flinders (FLB06) | Flinders Lofty Block | Rare (IUCN: RA d(i,ii)) [comes up in floods; localised; habitat specific] |
Eyre Hills (EYB03) | Eyre Yorke Block | Near Threatened [doesn't need much rain] |
Talia (EYB04) | | Least Concern |
Eyre Mallee (EYB05) | | Least Concern |
South Olary Plain (MDD01) | Murray Darling Depression | Rare (IUCN: RA d(ii)) |
Murray Mallee (MDD02) | | Rare (IUCN: RA d(ii)) [undercollected] |
Murray Lakes and Coorong (MDD03) | | Rare (IUCN: RA d(i,ii)) (Probable Decline) [not much known, taxo changes] |
Lowan Mallee (MDD04) | | Rare (IUCN: RA d(ii)) [undercollected] |
Murray Scroll Belt (RIV06) | Riverina | Rare (IUCN: RA d(ii)) [undercollected] |
Myall Plains (GAW01) | Gawler | Least Concern |
Gawler Volcanics (GAW02) | | Least Concern |
Gawler Lakes (GAW03) | | Least Concern |
Arcoona Plateau (GAW04) | | Least Concern |
Torrens (GAW06) | | Near Threatened [comes up in floods; localised; habitat specific] |
Maralinga (GVD03) | Great Victoria Desert | Least Concern |
Kintore (GVD04) | | Rare (IUCN: RA d(i,ii)) |
Yellabinna (GVD06) | | Least Concern |
Yalata (NUL03) | Nullarbor | Least Concern |
Warriner (SSD04) | Simpson Strzelecki Dunefields | Near Threatened [comes up in floods; localised; habitat specific] |
Breakaways (STP01) | Stony Plains | Rare (IUCN: RA d(ii)) [comes up in floods; localised; habitat specific] |
Oodnadatta (STP02) | | Least Concern |
Witjira (STP06) | | Rare (IUCN: RA d(i,ii)) |
Coongie (CHC06) | Channel Country | Least Concern [comes up in floods; localised; habitat specific] |
Mann-Musgrave Block (CER01) | Central Ranges | Near Threatened |
Watarru (CER02) | | Near Threatened [specific habitat] |
Everard Block (CER03) | | Near Threatened |
Central Flinders (FLB06) | Flinders Lofty Block | Rare (IUCN: RA d(i,ii)) [comes up in floods; localised; habitat specific] |
3 of 5 subregions | Eyre Yorke Block | Least Concern , Near Threatened |
4 of 6 subregions | Murray Darling Depression | Rare |
Murray Scroll Belt (RIV06) | Riverina | Rare (IUCN: RA d(ii)) [undercollected] |
5 of 8 subregions | Gawler | Least Concern , Near Threatened |
3 of 4 subregions | Great Victoria Desert | Least Concern , Rare |
Yalata (NUL03) | Nullarbor | Least Concern |
Warriner (SSD04) | Simpson Strzelecki Dunefields | Near Threatened [comes up in floods; localised; habitat specific] |
3 of 7 subregions | Stony Plains | Least Concern , Rare |
Coongie (CHC06) | Channel Country | Least Concern [comes up in floods; localised; habitat specific] |
3 of 3 subregions | Central Ranges | Near Threatened |
Botanical art
Kath Alcock paintings: 6
Prior names
Triglochin calcitrapum, orth.var., partly
Triglochin calcitrapa, partly
Triglochin sp. B Flora of Australia (P.G.Wilson 4294)
Triglochin sp. B (J.Z.Weber 1330)
Triglochin calcitrapa var. pedunculata
Triglochin elongata, nom.illeg., non Buchenau(1903)
Triglochin calcitrapa var. isingiana
Triglochin calcitrapum, orth.var., partly
Common names
Long-spurred Arrowgrass
Spurred Arrowgrass
Etymology
Triglochin from the Greek 'treis' meaning three and 'glochis' meaning a point; referring to its three-sided carpels. Isingana named after Ernest Horace Ising (1884-1973), an Adelaide born railways clerk and botanist, who devoted the best part of his life to the study of botany and plant collecting especially in South Australia including the type specimen from Coglin Creek, Central Australia in 1931.
Distribution and status
Found across south Australia, growing on temporarily damp soil in a variety of habitats. Also found in all mainland states. Native. Common in South Australia. Common in the other states.
Herbarium regions: North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, South Eastern, Green Adelaide
AVH map: SA distribution map (external link)
Plant description
Slender annual herb to 17 cm high. Leaves flat and thread-like, to 9 cm long, shorter than or as long as the inflorescence. Inflorescence erect or ascending, to 9 cm long with the fruiting part at the top to 2 cm long with 6–16 fruits. Flowering between August and October. Fruits are straw-coloured (sometime tinged purple) narrowly pyramid fruit to 7 mm long and 1.2 mm wide just on a short stalk with six seed segments (carpels), 3 fertile alternating with 3 undeveloped sterile ones. Seeds are straw-coloured (sometime tinged purple) narrow wedge-shaped seed to 7 mm long and 0.5 mm wide, with 2 lateral recurved to upcurved spurs to 1.5 mm long at the base. Seed embryo type is linear.
Seed collection and propagation
Collect seeds between September and November. Collect mature fruits either by breaking off individual spikes or by removing plants that are drying off with fruits that are straw-colour and seed segments coming apart easily. Place the fruit spikes in a tray and leave to dry for 1 to 2 weeks. Then rub the dried fruit spikes with a rubber bung to dislodge the seeds. Use a sieve to separate any unwanted material. 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.
Location | No. of seeds (weight grams) | Number of plants | Date collected | Collection number Collection location | Date stored | % Viability | Storage temperature | BGA | 23,900 (16.33 g) | | 31-Aug-2016 | JRG406 North Western | 1-Nov-2017 | 100% | -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.
Germination table:
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