Avocado Tree Identification Guide

Key Identifying Features

The avocado (Persea americana) is a large evergreen tree in the laurel family. It is most readily identified by its large, glossy, leathery leaves, the anise or licorice scent released when leaves are crushed, and of course the heavy, pear-shaped fruit with a single very large seed. The dense, dark, broad crown is also distinctive.

• Large, glossy, dark green leaves clustered toward branch tips
• Anise/licorice scent from crushed foliage (especially Mexican-race types)
• Tiny greenish-yellow flowers in branched sprays
• Heavy single-seeded fruit with leathery to thick skin

Leaves & Stems

Avocado leaves are alternate, elliptic to oval, 10 to 30 cm long, leathery, glossy dark green above and paler, sometimes reddish-tinged, beneath. New growth often flushes bronze or coppery red. Many varieties, particularly the Mexican race, give off a distinct anise smell when the leaf is crushed, a strong identifying clue. Twigs are stout and green when young, turning grey-brown. Bark is grey-brown and develops shallow furrows. Trees can reach 15 to 20 m if unpruned.

Flowers & Fruit

Avocado produces masses of small, greenish-yellow flowers (each only 5 to 10 mm) in branched panicles. They are subtle and easily overlooked. The flowers have an unusual time-staggered male/female opening behavior (protogynous dichogamy) split into type A and type B groups, which aids cross-pollination. The fruit is a large berry (botanically), pear-shaped to round, with green to purple-black skin that may be smooth or pebbly, buttery flesh, and a single large round seed that fills much of the interior.

How to Tell It Apart from Look-Alikes

• Bay laurel and other Lauraceae: share aromatic leaves, but their leaves are smaller, and they lack the large single-seeded avocado fruit.
• Mango (Mangifera): also a large evergreen with glossy leaves and reddish new growth, but mango leaves are longer and narrower, and the fruit has a flat fibrous stone, not a round seed.
• Magnolia: similar large glossy leaves, but magnolia leaves are not anise-scented and produce showy flowers and cone-like fruit.

The anise-scented foliage plus the single oversized seed are the decisive avocado identifiers.

Where You'll Find It

Avocados are grown in tropical and subtropical climates: Mexico and Central America (their native range), California, Florida, the Mediterranean, and parts of Africa and Asia. They are frost-sensitive and need well-drained soil. Look for them in orchards, large home gardens, and as shade trees in warm regions.

Quick ID Checklist

• Large glossy leathery evergreen leaves
• Crushed leaves smell of anise or licorice
• New growth flushes bronze or red
• Tiny greenish-yellow flowers in sprays
• Heavy pear-shaped fruit with one large seed
• Broad dense crown, frost-sensitive warm-climate tree