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Natural populations

Baumea articulata is a truly aquatic species, growing in standing water up to 1m deep, in wet black waterlogged sand [21, 44]. It inhabits coastal lagoons, deeper swamps and slow-moving streams [16, 21]. In Tasmania , found along rivers in the north east coast and is classed as rare [50]. With seed spread via the mud on the feet of water birds, it has a scattered occurrence in inland wetlands. With slow initial development and productivity, the sedge will eventually form tall (up to 2m) dense stands exhibiting little seasonal dieback [65].

Flowering and seeds

This sedge typically flowers and fruits in summer. In general, wetland sedges and rushes can be propagated using the bog method [107, 108].

Cultivation and uses

It is suitable for low level constructed wetland treatment systems [65]. It provides valuable habitat for water birds.

Key descriptors:

Climate parameters
Mean annual rainfall: 350-3100 mm
Rainfall distribution pattern: summer, uniform or winter
Mean annual temperature: 11-22 °C
Mean max. temperature of the hottest month: 22-31 °C
Mean min. temperature of the coldest month: 0-15 °C
Frosts (approx. no. per year): greater than 20
Frost intensity: light to moderate (0 to -5°C)
Altitude: 0-750 metres
Tolerance of climate extremes
Frost: tolerates frosts in the 0° to -5°C range
Soil factors
Texture: loam, sandy loam, sandy clay loam
Soil pH reaction: acidic (less than 6.5)
Soil depth: moderate to deep (30-100 cm or greater)
Drainage:  poorly to imperfectly drained or seasonally waterlogged
Salinity: slightly to moderately saline (?)
Biological traits under cultivation
Habit: evergreen groundcover
Growth rate: fast
Root system: shallow and spreading

References

[52] Lazarus E, Lawrence N, Potts W (2003) Threatened Flora of Tasmania. Threatened Species Unit DPIWE, Tasmania. (Online http://www.dpiw.tas.gov.au/ThreatenedFloraCD/ Accessed: September 2007).

[65] Tanner CC (1996) Plants for constructed wetland treatment systems - A comparison of the growth and nutrient uptake of eight emergent species. Ecological Engineering 7, pp 59-83.

[107] Romanski N (1998) Planting wetlands and dams – a practical guide to wetland design, construction and propagation. UNSW Press, Sydney.

[108] Brock M (1997) Are there seeds in your wetland?: assessing wetland vegetation. Land and Water Australia, Australian Government.

Internet links

FloraBase Western Australia Flora Online – species description & distribution:http://florabase.calm.wa.gov.au/browse/profile/741

PlantNet NSW Flora Online –speciesdescription&distribution:http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Baumea~articulata 

South Australia FloraOnline-speciesdescription&distribution:http://www.flora.sa.gov.au/cgi-bin/texhtml.cgi?form=speciesfacts&family=Cyperaceae&genus=Baumea&species=articulata

Threatened Species of Tasmania:http://www.dpiw.tas.gov.au/ThreatenedFloraCD/Baumea%20articulata.pdf

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