Brazilian guava or Mantavideo guava 

Feijoa Gemini is a bushy upright, evergreen shrub with thick grey green leaves and densely felted undersides. Produces pink and white petaled flowers in early summer with red stamens. Requires another variety for cross pollination to produce small oval shaped edible guava fruits in autumn. Fruits are fleshy green and naturally mature to give a pleasant taste and texture. 

Eventual height up to 1.5m with a spread of about 1 metre.