abstract:Psidium cattleianum, named in honour of notable English horticulturist Sir William Cattley, commonly known as Cattley guava or Peruvian guava, is a small tree (2–6 m tall), bearing small red or yellow fruit, which are somewhat sour but sometimes eaten or made into jam. The red-fruited variety is known as strawberry guava; the yellow-fruited variety is known as lemon guava, and in Hawaii as waiawī.