The elm cultivar Ulmus 'Hertfordensis Angustifolia' was mentioned (as Ulmus campestris hertfordensis angustifolia) by Boulger in Gardener's Chronicle II.
This elm cultivar, Ulmus 'Hertfordensis Angustifolia' (also referred to as Ulmus campestris hertfordensis angustifolia), was noted by Boulger in Gardener's Chronicle II.