Rhubarb is a cultivated plant in the genus Rheum in the family Polygonaceae. It is a herbaceous perennial growing from short, thick rhizomes
Salad Burnet, or Poterium sanguisorba, is a genus of flowering plants in the family Rosaceae native to the temperate regions of the Northern Hemisphere.
Portulaca oleracea (commonly green purslane) is an annual succulent in the family Portulacaceae, which may reach 40 cm (16 in) in height.
Plantago coronopus (known as buck's-horn plantain, minutina or erba stella) is a herbaceous annual to perennial flowering plant in the family Plantaginaceae