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Hay Fever in New Zealand
Dunedin is overshadowed by a heavy cloud of grass pollen during the late half of December and throughout January and the early half of February. Exposure of pollen plates, and a field survey made by C. E. Hercus and M. N. Watt of the department of bacteriology, University of Otago, and reported in the New Zealand Medical Journal for December, 1931, show that the grasses chiefly responsible are, in order of pollinating, cocksfoot, Yorkshire fog, both perennial rye and Italian rye, crested dogstail, timothy, and brown top, the latter being practically the only grass pollinating during the latter half of the aforementioned period. Prior to the peak period the only important grasses pollinating are Poa annua, Poa pratensis, twitch, and sweet vernal; the latter is extremely abundant, a profuse pollinator, but happily its period of intense pollination is relatively short, a matter of some three
AUSTRALIA. JAMA. 1932;98(7):568–569. doi:10.1001/jama.1932.02730330050023
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