Hydrilla verticillata
ζHydrilla verticillata (Linn. f.) Royle ζ, resembling the "oxygen weed" group, was recorded by Healy Standard Common Names 1969, 115 for N.Z. The first collection was-Lake Tutira, Hawkes Bay, P. Grant, April 1963 (CHR 140295); two more gatherings have been made from Lake Tutira-R. Mason, June 1965 (CHR 167337) and R. Fisher Oct. 1967 (CHR 167407). (Europe, Africa, Asia, Australia)
