Complex sentence: Suckering was occasional (a vigorous sucker has now attained a height of 4 m), suggesting an "Ulmus minor" hybrid origin; the Royal Botanic Garden Edinburgh took cuttings in the 1990s.
Split into simpler sentences: Suckering was occasional (a vigorous sucker has now attained a height of 4 m), suggesting an "Ulmus minor" hybrid origin. The Royal Botanic Garden Edinburgh took cuttings in the 1990s.