Phalaris aquatica var. stenoptera
(= P. tuberosa var. stenoptera = P. stenoptera)
("Harding-grass", "Holdfast Harding-grass", "Peruvian Wintergrass" )
Introduced cultivar from Australia [This scenario is presented by most. Hortus considers its origin to be unclear.]. Cultivated and naturalized in California and the Pacific Northwest.
Variable amounts. Festi & Samorini 1994 cited Rendig et al. 1970 as finding 135-264 mg of 5-MeO-DMT and
0-60 mg of DMT per ml of expressed juice.
DMT and 5-MeO-DMT are present in foliage [5-MeO-DMT>DMT]. Total indole alkaloid levels hit two peaks of 0.14% in late September and mid November one year but only one peak in one or the other during two other years. In the latter cases; the year with a peak in late September was also around 0.14% while the year with the peak in mid-November was 0.08%. This last year showed some of its lowest values in late September. Their analysis only covered mid September through mid February. Total indolealkylamines were 0.08% or less the rest of the times assayed, with a low around 0.02%. (All values approximate; taken from graphs) Alkaloid levels were found to be markedly different from one month to the next and one year to the next. Rendig et al. 1976.
McComb and coworkers determined the 5-MeO-DMT concentration in Phalaris tuberosa leaves (cv. Hardinggrass) by use of an estimation obtained via UV absorption of the Xanthylium salts formed during the alkaloid's reaction with Xanthydrol.
They reported 0.236% in 7 day old fresh leaves, 0.105% in 9 day old fresh leaves and 0.077% in 21 day old fresh leaves. all figures are % dry weight
They did not evaluate the other components of the leaves in this paper but noted that neither gramine nor hordenine formed colored complexes with Xanthydrol. McComb et al. 1969.