Plants
Rushes, Sedges & Mat Rushes
Sighting 4397502

Machaerina articulata

Jointed Twig-rush at Amaroo, ACT

Machaerina articulata at Amaroo, ACT - 6 Oct 2021 02:32 PM
Machaerina articulata at Amaroo, ACT - 6 Oct 2021 02:32 PM
Machaerina articulata at Amaroo, ACT - 6 Oct 2021 02:32 PM
Machaerina articulata at Amaroo, ACT - 6 Oct 2021 02:32 PM
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Identification history

Machaerina articulata 7 Oct 2021 MichaelMulvaney
Machaerina articulata 6 Oct 2021 JaneR

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User's notes

Dense, nearly continuous fringe around dam on Ginninderra Creek. Probably planted.

3 comments

MichaelMulvaney wrote:
   7 Oct 2021
Not sure whether we treat this as a non-local native or translocation of a regionally rare plant?
JaneR wrote:
   7 Oct 2021
Baumea articulata is popular with WQ pond designers, partly because it is a tall rhizomatous clonal evergreen macrophyte that does the job; and partly because it was used as a test species in the early research into effectiveness of planted wetlands (1990s in particular) and some of this work was done in areas where Baumea articulata occurs (Swan Coastal Plain, Adelaide area, coastal NSW and Qld).

In a perfect world, it would be nice to be able to distinguish between CNM sightings of a species that has been planted (whether terrestrial or wetland) for whatever reason (e.g. water quality, ornamental amenity on roadside), and CNM sightings of species that is radiating outwards from a planting (ie self-establishing, becoming weedy). But being consistent on this could be hard, and might be species-dependent.

Ficinia nodosa is an analogous species, in terms of its natural distribution and use in urban wetland plantings. CNM treats that as 'non-local native'. That seems to sum up Baumea articulata, as well.
The category 'translocation' works OK for an actual planting but not so good if that planting starts to spread. ?
MichaelMulvaney wrote:
   7 Oct 2021
Thanks Jane great reasoning

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