Schoenoplectiella dissachantha

Cyperaceae

Blunt Club-rush,

Inland Club-rush

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plant: Schoenoplectiella dissachantha p DEM7291 Ingomar Station

plant: Schoenoplectiella dissachantha p DEMWD447 Sollies Tank

plant: Schoenoplectiella dissachantha pl DEMWD447 Sollies Tank

fruit: Schoenoplectiella dissacantha DJD3381 fruits

fruit: Schoenoplectiella dissachantha fr DEM7291 Ingomar Station

fruit: Schoenoplectiella dissachantha fr DEMWD447 Sollies Tank

seed: Schoenoplectiella dissacantha DJD3381 seed

seed: Schoenoplectiella dissacantha DJD3381 seeds

seed: Schoenoplectiella dissachantha DEM7291 Seed

dissected seed: Schoenoplectiella dissacantha TST940 Longitudinal cut

dissected seed: Schoenoplectiella dissacantha TST940 Transverse cut

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

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IBRA regions

LEGEND

SUMMARY

Murray Scroll Belt (RIV06)	Riverina	Vulnerable (IUCN: VU D1+2)
Gawler Lakes (GAW03)	Gawler	Rare (IUCN: RA d(ii)) [flood response]
Arcoona Plateau (GAW04)		Rare (IUCN: RA d(ii)) [flood response]
Roxby (GAW07)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Commonwealth Hill (GAW08)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Tallaringa (GVD05)	Great Victoria Desert	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Barrier Range Outwash (BHC04)	Broken Hill Complex	Rare (IUCN: RA d(ii)) [spread by birds; ephemeral]
Bimbowrie (BHC05)		Rare (IUCN: RA d(ii)) [spread by birds; ephemeral]
Warriner (SSD04)	Simpson Strzelecki Dunefields	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Strzelecki Desert (SSD05)		Rare (IUCN: RA d(i,ii)) [responds to good years of rain; in niche habitats]
Breakaways (STP01)	Stony Plains	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Oodnadatta (STP02)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Murnpeowie (STP03)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Macumba (STP05)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Witjira (STP06)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Sturt Stony Desert (CHC02)	Channel Country	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Coongie (CHC06)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Lake Pure (CHC07)		Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
Pedirka (FIN04)	Finke	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]

IBRA regions

LEGEND

DISPLAY ALL

Murray Scroll Belt (RIV06)	Riverina	Vulnerable (IUCN: VU D1+2)
4 of 8 subregions	Gawler	Rare
Tallaringa (GVD05)	Great Victoria Desert	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]
2 of 4 subregions	Broken Hill Complex	Rare
2 of 4 subregions	Simpson Strzelecki Dunefields	Rare
5 of 7 subregions	Stony Plains	Rare
3 of 4 subregions	Channel Country	Rare
Pedirka (FIN04)	Finke	Rare (IUCN: RA d(ii)) [responds to good years of rain; in niche habitats]

Prior names

Schoenoplectus dissachanthus

Scirpus dissachanthus

Common names

Blunt Club-rush

Inland Club-rush

Etymology

Greek 'schoinos' a rush, 'plektos' twisted and 'dis' two, 'akantha' thorn.

Distribution and status

Grows in seasonally wet open situations. Native
Herbarium regions: North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Eastern, Murray
NRM regions: Alinytjara Wilurara, South Australian Arid Lands, South Australian Murray-Darling Basin
AVH map: SA distribution map (external link)

Plant description

Annual tufted herb to 30cm high. Leaves usually reduced to sheaths. Inflorescence a cluster of 1ï¿½5 (rarely to 10) sessile spikelets. Spikelets 1-3 in a cluster, sessile, yellowish or greenish-yellow, oblong, cylindrical, obtuse, usually 7-10 mm long, many-flowered. Flowering March-April . Fruits are nut subglobose or obovoid, unequally biconvex, 1.0ï¿½1.3 mm long, 1 mm wide, closely and prominently transversely rugose, yellow-brown to black, shining.

Seeds stored:

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Location	No. of seeds (weight grams)	Number of plants	Date collected	Collection number Collection location	Date stored	% Viability	Storage temperature
BGA MSB	34,500 (12.6 g) 34,500 (12.6 g)	50+	12-Mar-2007	RJB70963B Gairdner-Torrens	1-Aug-2007	80%	-18°C
BGA MSB	14,000 (4.76 g) 14,000 (4.76 g)		13-Mar-2007	RJB70961 Gairdner-Torrens	1-Aug-2007	90%	-18°C
BGA	2,900 (1.77 g)	50+	11-Aug-2010	TST940 Lake Eyre	1-Jan-2012	100%	-18°C
BGA	6,700 (3.11 g)		31-Aug-2016	DJD3381 Lake Eyre	1-Nov-2017	75%	+5°C, -18°C, -80°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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Date	Result	T0	T50	Pre-treatment \| Germination medium \| Incubator: Photoperiod / Thermoperiod
Jul-17	0%	NA	NA	30% hydrogen peroxide for 20 min, water rinse, 500 mg/L gibberellic acid for 44 h; 1% agar; Incubated under spring/autumn conditions
Jul-17	0%	NA	NA	dry heat 100Â°C oven for 10 min, 30% hydrogen peroxide for 20 min, water rinse, 500 mg/L gibberellic acid for 44 h; 1% agar; Incubated under spring/autumn conditions
Jul-17	0%	NA	NA	30% hydrogen peroxide for 20 min, water rinse, 500 mg/L gibberellic acid for 44 h; 1% agar; Incubated under summer conditions
Jul-17	0%	NA	NA	dry heat 100Â°C oven for 10 min, 30% hydrogen peroxide for 20 min, water rinse, 500 mg/L gibberellic acid for 44 h; 1% agar; Incubated under summer conditions
Jul-17	0%	NA	NA	30% hydrogen peroxide for 20 min, water rinse, 500 mg/L gibberellic acid for 44 h; 1% agar; Incubated under winter conditions
Jul-17	0%	NA	NA	dry heat 100Â°C oven for 10 min, 30% hydrogen peroxide for 20 min, water rinse, 500 mg/L gibberellic acid for 44 h; 1% agar; Incubated under winter conditions

Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)