Perennial tussock forming C3 grass of up to 1m high. Flat leaves 1-5mm diameter, strongly ribbed on adaxial surface with rough margins. Infloresence an open panicle; stem seeds (cleistogenes) are also produced (Gardner, 1998).
Peak flowering of Chilean needle grass in Australia occurs between November and February (Gardner, 1998), however it has the ability to flower all year round (Ens, 2002). The seed bank has been estimated to potentially persist in the soil for up to 12 years even with annual glyphosate application (Bourdot and Hurrell 1992)!
Reproduces by sexual (chasmogamous) and asexual (cleistogamous) seed production. The cleistogenes are formed in the leaf sheaths and culms while the chasmogenes are found in the infloresence (Gardner, 1998). Up to 22,000 chasmogamous seeds/plant/year can be produced (Bourdot and Hurrell 1992). Production of the asexual seeds is a common response following slashing, grazing or fire (Gardner, 1998).
Compiler: Emilie-Jane Ens, PhD candidate University of Wollongong, Australia.
Review: Emilie-Jane Ens, PhD candidate University of Wollongong, Australia.
Publication date: 2005-11-16
Recommended citation: Global Invasive Species Database (2019) Species profile: Nassella neesiana. Downloaded from http://www.iucngisd.org/gisd/species.php?sc=458 on 17-11-2019.