Psidium guajava L.

• a shrub or small tree with reddish-brown bark that peels off in flakes.
• its younger stems are four-angled and somewhat hairy.
• its oppositely arranged leaves (7-15 cm long and 3-6.5 cm wide) have 10-20 pairs of prominent side veins.
• its white flowers (about 25 mm across) are usually borne singly in the upper leaf forks and have large numbers of stamens.
• its rounded to pear-shaped fruit (2.5-10 cm long) is yellow and crowned with the remains of the persistent sepals.

[From: Environmental Weeds of Australia]