Complex sentence: The orthography of the common name is variously given as Bird's-foot Trefoil, Birdsfoot Trefoil, Birdfoot Trefoil, or Bird's Foot Trefoil; it is also known in cultivation in North America as Birdfoot Deervetch.
Split into simpler sentences: The orthography of the common name is variously given as Common Bird's-foot Trefoil (or similar, such as "birdsfoot trefoil", etc). It is also known in cultivation in North America as Birdfoot Deervetch.