2. Guava originated in tropical America, and then spread to North America, Oceania, New Zealand, Pacific Islands, Indonesia, India, Malaysia, North Africa, Vietnam and other places.
3. Guava buds are angular and hairy. Leaf blade leathery, oblong to elliptic, apex acute or obtuse, base nearly round, slightly rough above, hairy below, lateral veins usually depressed, reticulate veins obvious; The petiole is 5 mm long. Flowers solitary or 2-3 arranged in cymes; The calyx tube is bell-shaped and hairy, and the calyx cap is irregularly cracked; Petals white; Stamens 6-9 mm long; The ovary is inferior, connate with the calyx, and the style is as long as the stamens. Berry is spherical, oval or pear-shaped, with persistent sepals at the top, white and yellow flesh, hypertrophy of placenta, fleshy and red; There are many kinds of seeds.