Agapanthus is the only genus in the subfamily Agapanthoideae of the flowering plant family Amaryllidaceae.
 The family is in the monocot order Asparagales.
 The name is derived from scientific Greek: αγάπη (agape) = love, άνθος (anthos) = flower.
Pterocephalus is a genus in the Caprifoliaceae family of herbs and shrubs, comprising 25 species ranging from the Mediterranean, to central Asia, the Himalayas, western China, and tropical Africa.
Agapanthoideae is a subfamily of monocot flowering plants in the family Amaryllidaceae, order Asparagales.
 It is one of three subfamilies of Amaryllidaceae.
 It was formerly treated as a separate family, Agapanthaceae.
 The subfamily name is derived from the generic name of the type genus, "Agapanthus".
Agapanthus praecox (common agapanthus, blue lily, African lily, or lily of the Nile) is a popular garden plant around the world, especially in Mediterranean climates.
 It is native of Natal and Cape of Good Hope in South Africa, local names include "agapant", "bloulelie", "isicakathi" and "ubani".
 Most of the cultivated plants of the genus "Agapanthus" are hybrids or cultivars of this species.
 The plant is reportedly naturalized in Great Britain, Madeira, the Canary Islands, Eritrea, Ethiopia, St. Helena, Victoria, Norfolk Island, New Zealand, Mexico, Honduras, Costa Rica and Tristan da Cunha.
Agapanthus africanus (African lily) is a flowering plant from the genus "Agapanthus" native to the area of Cape of Good Hope in South Africa.
 "A. africanus" is more difficult to grow in gardens than "A. praecox", and almost all plants sold as "A. africanus" are actually "A. praecox".

Question: Are Pterocephalus and Agapanthus both genus of plants ?
Answer: yes