Answer: There are a number of Mexican avocado trees but the most commonly planted are:
Mexicola. The tree is vigorous, tall and spreading; fruit small, 5 oz., round pyriform, skin paper-thin, purplish black, waxy bloom. Flesh highest quality, seed very large. Hardiest cultivar known; recovers rapidly from freeze. Defoliated at 20? F, trunk killed at 17? F. Season September.
Mexicola Grande. Tree similar in appearance to Mexicola but the fruit is 15% - 25% larger than Mexicola and somewhat rounder in shape with better seed/flesh ratio. Skin paper-thin, purple-black. High quality flesh with high oil content. Hardy to about 18? F
The Hass avocado is from Guatemala. The tree is rather open, and not especially tall. Fruit medium, to 12 oz., pyriform, skin thick, pebbled, coppery purple. Flesh good, oil 19%, seed fairly small. Currently the standard of the industry; hardy to 26? F. Season July.
Hope this answers your question.
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