New Zealand Map Series 1:
N138 615 809 (WGS84 -39.978385 175.088088)
New Zealand Map Series 260:
R22 883 343 (WGS84 -39.978007 175.087698)
Latitude and Longitude (WGS84):
39°58´ S 175°5´ E (WGS84 -39.966667 175.083333)
Abundance uncertain, but common in windcast drift, with Egeria densa (floating with live Azolla filiculoides, Lemna, Wolffia, Spirodela, Ricciocarpus).