[2] The hybrid was first discovered by George Lawson in July 1845 at Gullane, East Lothian, Scotland, and two voucher specimens were deposited in the herbarium of William Gardiner, Dundee.

Following Gardiner's death in 1852 the specimens were transferred as part of a bequest to the British Museum, and shortly afterward (ca.

1854) loaned to German botanist Friedrich W. Schultz, who described them as a new variety of Helosciadium nodiflorum, var.

longipedunculatum were collected at Port Meadow, Oxfordshire, England and a molecular analysis confirmed it as the hybrid H. repens × H.

[2] The original specimens are still housed in the Natural History Museum, London, under voucher number BM001144095, and the one situated to the left has been designated as the lectotype.