Which is a type of shrub, Cissus or Colletia?
Colletia Colletia is a genus of flowering plants in the family Rhamnaceae, with 15 to 17 species of spiny shrubs. All species of this genus are native to southern South America. They are non-legume nitrogen fixers.
Convolvulus cneorum Convolvulus cneorum, also known as silverbush, is a species of flowering plant in the family Convolvulaceae, which contains many plants described as "bindweed". However, unlike other species in the genus, it is an evergreen shrub rather than a vine, forming a low mound 0.6 - in height, with a similar spread. It produces 2.5 - diameter flowers which are white with a yellow throat. These are produced at the end of stems in loose panicles and may almost completely cover the plants. The leaves are grey-green and are covered in fine hairs which give the plant a silvery appearance.