Seeds of South Australia
Triglochin minutissima (Juncaginaceae)
Tiny Arrowgrass
List of species for Triglochin
Display more images
Click on an image to enlarge it
Seed collecting:
August to November
Herbarium regions:
Eyre Peninsula, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))   [changed to minutissimum]
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))
Fleurieu (KAN02) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [(no records) taxonomic issues; only around Victor Harbor; limited habitat; habitat quality declined]
Southern Yorke (EYB01)Eyre Yorke Block
 Rare   (IUCN: RA ab)   (Definite Decline)
St Vincent (EYB02) 
 Vulnerable   (IUCN: VU A2a)   (Definite Decline)
Eyre Hills (EYB03) 
 Data Deficient   [records not databased]
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 Triglochin]
Name derivation:
Triglochin from the Greek 'treis' meaning three and 'glochis' meaning a point; referring to its three-sided carpels. Minutissima from the Latin 'minutus' meaning very small and suffix 'issima' meaning most; referring to its tiny habit.
Found on the western Eyre Peninsula, Yorke Peninsula, Kangaroo Island, southern Mount Lofty Ranges and the upper South-east in South Australia, growing on damp saline soils near salt-lakes and coastal saltmarshes. Also found in Western Australia, Victoria and Tasmania.
Native. Rare in South Australia. Rare in Victoria and Tasmania. Common in Western Australia.
Plant description:
Slender annual herb to 4.5 cm high. Leaves flat and thread-like, to 2.5 cm long, shorter than or as long as the inflorescence. Inflorescence an erect or ascending spike to 3.5 cm long, fruiting part at the top to 1.8 cm long, with 7–13 fruits. Flowering between July and October.
Fruit type:
Grey-brown narrowly pyramidal to suboblong fruit to 2 mm long and 0.5 mm wide just above base on very short stalk with six seed segments (carpels), 3 fertile alternating with 3 undeveloped sterile ones. 
Seed type:
Grey-brown wedge-shaped seed 2 mm long and 0.5 mm wide, with 2 minute lateral obtuse points at the base.
Embryo type:
Seed collecting:
Collect mature fruits either by breaking off individual spikes or by removing plants that are drying off with fruits that are greyish or brown and seed segments coming apart easily.
Seed cleaning:
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.
Seed viability:
From one collection, the seed viability was high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
19500 (1.61 g)
19500 (1.61 g)
South Eastern
19-Sep-2008100%+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.