Plants of
South Australia
Triglochin turrifera
Juncaginaceae
Rocket-fruit Arrowgrass
Display all 6 images
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
Enlarge Map
Copy Map
Copy Map
Display IBRA region text

Botanical art

Kath Alcock paintings: 2.

Etymology

Triglochin from the Greek 'treis' meaning three and 'glochis' meaning a point; referring to its three-sided carpels. Turrifera from the Latin 'turris' meaning tower and the suffix '-fera' meaning bearing; referring to its tower or rocket-shaped fruit.

Distribution and status

Found in the upper South-east in South Australia, growing on wet soils in small temporary streams, roadside pools, gilgais and depression on granite outcrops. Also found in New South Wales and Victoria. Native. Very rare in South Australia. Uncommon in New South Wales. Common in Victoria.
Herbarium region: South Eastern
NRM region: South East
AVH map: SA distribution map (external link)

Plant description

Small annual herb to 14 cm high. Leaves flat and thread-like, to 14 cm long, usually longer than the inflorescence. Inflorescence an erect, ascending or spreading spike to 4.5 cm long, fruiting part at the top to 4 cm long, with 5–14 fruits. Flowering between July and September. Fruits are straw-coloured 6-sided rocket-shaped fruit to 5 mm long and 2 mm wide, stalkless or on very short stalk with 3 seed segments, all fertile and completely united and with 2 lateral thickened spurs to 1 mm long at the base. Seeds are same as for the fruit. 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 use you fingers to remove the dried fruit from the spikes. 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. From one collection, the seed viability was high, at 100%.

Seeds stored:
  Hide
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
 
MSB

2,600 (2.36 g)
100+22-Oct-2008DJD1195
South Eastern
55%
BGA1,050 (2 g)50+21-Oct-2008DJD1353
South Eastern
20-Jul-2009100%-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.