Phalaris aquatica, known by the common names bulbous canary-grass
Description
It is an erect, waist-high, stout perennial
bunch grass, with grayish to bluish green leaves. Flowering heads are dense, spike-like, and usually long. It is slow to develop from seed, but can form large bunches after several years.
Phalaris arundinacea (reed canary grass) differs from Harding grass in having more distinct rhizomes, and an inflorescence that is compact at first but becomes more open as the branches spread.
Hybrids of Harding grass and reed canary grass have been produced. Varieties include 'AQ1', 'Uneta', and 'Australis'.
P. aquatica is a quick-growing grass which incorporates and utilises soil nitrogen rapidly.
Geography
Phalaris aquatica originated from
Southern Europe and the
Caucasus. It is naturalized in South Africa, Australia, New Zealand and the USA.
Although very recently introduced there, its
pasture value was first recognised in Australia.
Domesticated cultivation then spread to the United States, Argentina and several other countries in South America, and New Zealand.
Chemical constituents
Leaves and seedlings contain
gramine
and dimethyltryptamine.
["N,N-Dimethyltryptamine Production in Phalaris aquatica Seedlings: A Mathematical Model for its Synthesis"
]
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Forage
Phalaris aquatica is a pasture species grazed by ruminants. The grass can also be cut, providing good quality fodder for grazing livestock for 8 to 12 months a year.
Toxicity
Some Phalaris species contain gramine (also found in Avena sativa 'Oats') which is claimed to cause brain damage, other organ damage, central nervous system damage and death in sheep (when injected in very large amounts).[
]
In Victoria, Australia, it is reported that kangaroos grazing on Phalaris aquatica may develop a condition known familiarly as "Phalaris staggers", in which coordination and mobility are affected.
Invasive species
Harding grass is an invasive species in grassland, oak woodland, chaparral, and riparian zone . Native grasses and grassland habitat in California are affected.
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