SOME QUOTES ABOUT PHALARIS SPECIES
REED CANARYGRASS (Phalaris arundinacea L)
Phalaris: an old Greek name for a grass.
Phalaris: A genus of about twenty species, these distributed in the temperate regions of the world. Of the nine species in the United States, four have been introduced from Europe. Most of our species occur in moist situations on disturbed soils and are more or less weedy. Phalaris arundinacea, reed canary grass, is a valuable hay grass in the northern midwestern
states... (and is) found in marshes and moist places, New Brunswick to Alaska, south throughout the United States except in the southeast; Eurasia. An important lowland hay grass from Wisconsin to Montana.
Gould, F. W., Grasses of Southwestern United
States, University of Arizona Press, Pg 260
At least nine alkaloids, grouped as either phenole, indoles or B-carbolines, have been found in reed ca- narygrass ... Genotypes completely free of alkaloids are not known, but the variations in alkaloid concen- tration within groups of plants treated uniformly are shown to be very wide (Marten 1974)... It is very difficult to explain the presence of skewed distribution in this material without knowing exactly the function of alkaloids in reed canarygrass. The skewed distribu- tions exist in all populations, independent of the origin, or whether the populations have been exposed to selection or not ... Assuming normal distribution and
if natural selection has been going on by means of
grazing, a selection towards higher alkaloid levels
should be expected.
Two of the alkaloids found in reed canarygrass (DMT and 5-MeO-DMT) have been claimed to be re-
sponsible for two diseases in sheep and cattle grazing Phalaris aquatica L. (= P. tuberosa L.) in Australia. One of these diseases, "Phalaris staggers", causes chronic disorder of the central nervous system. The other disease is "sudden death," characterized by sudden collapse,ventricular fibrillation and cardiac arrest (Gallagher et al. 1964; Oram 1970) ... Parenteral administration of these two tryptamines has proved them
toxic to both ruminants and non-ruminants (Marten
1 974), though it has also been indicated that these disorders are very likely not caused by indole alkaloids alone.
Alkaloid concentration in reed canarygrass is e hanced by moisture stress (Marten 1973), by decreasing light intensity and by high rates of N fertilzer, especially NH4-N source (Frelich and Marten 1972). Cutting reed canarygrass every second week produced a sharp increase in indole alkaloid levels as compared with levels in free growth tissue (Woods and Clark 1971). Alkaloid concentration is greatly reduced in dried grass (Donker et al. 1976) and in silage (Hovin etal. 1980).
Alkaloids in reed canarygrass are confined largely to the leave blades (Marten 1973) ... Hagman et al. (1975 ) stated that the upper third of the total herbage had the highest and most uniform alkaloid concentration as compared with the middle and lower thirds. High correlation (r = 0.94 to 0.9
between alkaloid concentrations in the upper third and in the total herb-
age enabled them to recommend sampling only the upper third of herbage canopies for routine alkaloid screening of reed canarygrass...
Liv Ostrem (1987). "Studies on genetic variation in reed canarygrass, Phalaris arundinaceae L.," Fureneset Research Station, The Norwegian State Agrig-
cultural Research Stations, Norway, Her edit as 107
HARDINGGRASS, Phalaris tuberosa (sic) var.
stenoptera, a cool season perennial, is grown in the
Southwest and in southern California under irrigation
in forage mixtures for hay and pasture...
BULB CANARYGRASS, Phalaris tuberosa (sic),
is a perennial extensively grown in Australia... It is
necessary there to add cobalt to the soil or to the ani-
mal diet when Phalaris toxicity is encountered with
sheep or cattle grazing this species.
Hughes, H. D., et al (1961) Forages ~ The Science
of Grassland Agriculture, 2nd ed. Iowa State Univ.
Press, Ames, IA, pg. 250
Plants of Phalaris aquatica L. (syn. P. tuberosa
L.) "Stenoptera" grown from seed have widely varying
differences in their concentrations of
N,N-dimethyltryptamine and N,N- dimethyl-
5-methoxytryptamine. Although some variation was
anticipated, the magnitude of the differences was be-
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