Opuntia Mill. >

Leaves absent or if present then reduced and terete. Flowers sessile Opuntia

Stem segments mostly more than 5 cm wide and 10 cm long

Areoles with 1 or 2 spines at most, rarely more.

Areoles with 1–2 long spines 1–4 cm long. Tree-like. Cumberland Plain. Weed, particularly near creeks. Introd. from S. America. Tree Pear O.monocantha