Species: Linaria vulgaris
Linaria comes from the Latin term for flax. Vulgaris simply means common.
Species: Robinia pseudoacacia
Robinia was named for the French herbalist and botanist Jean Robin (who worked for Henry IV of France) and his son Vespasian. The term pseudoacacia means false acacia.
Species: Rubus fruticosus
The word Rubus is thought to derive from the Latin word for red, ruber. The term fruticosus means "shrubby"
Species: Lythrum salicaria
The Lythrum part of the species name comes from the Greek lythron, which means blood, and is a reference to the colour of the flowers. The second part of the name, which means willow-like, refers to the leaves.