Bryan McAllister’s personal reference notebook
July 30, 2026Short & citedBlog
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Field Notes • Botany

Pistachio

A pistachio is the edible seed of the pistachio tree, *Pistacia vera*, a member of the cashew family.

Updated July 30, 20261 min readCited sources

A pistachio is the edible seed of the pistachio tree, *Pistacia vera*. It is commonly eaten as a snack and used in cooking and baking.

What it is

Botanically, a pistachio is not a true nut but the seed of a drupe — a fruit with a hard stone. The tree belongs to the cashew family and is native to Iran and Central Asia. The edible part is the greenish kernel inside the hard shell.

Why it matters

Pistachios are energy-dense: a 100-gram serving provides 562 calories. They are a source of protein, dietary fibre, and several micronutrients, including thiamin and vitamin B6. Culinary uses range from roasted snacks to desserts, ice cream, and pistachio paste.

Where it comes from

The pistachio tree has been cultivated for thousands of years in arid regions. Modern commercial production is concentrated in the United States, Iran, and Turkey, which together account for most of the world's 1.4 million tonnes (2024).

In short

  • Pistachio is the seed of a drupe, not a true nut.
  • Provides 562 kcal per 100 g; good source of protein and fibre.
  • Native to Iran and Central Asia; major producers: US, Iran, Turkey.
  • Eaten as snack, in desserts, and as paste or butter.
Canadian angle

Pistachios are widely sold and used in Canada as snack foods and baking ingredients, and they are relevant to Canadian food labelling and allergen awareness because tree nuts are a priority allergen.

Quick questions

What is a pistachio?
A pistachio is the edible seed of the pistachio tree, *Pistacia vera*. It is commonly eaten as a snack and used in cooking.
Are pistachios nuts or seeds?
Botanically, pistachios are seeds inside a drupe, not true nuts. In culinary use, they are commonly called nuts.
Where do pistachios come from?
The pistachio tree is native to Iran and Central Asia. It is now grown commercially in the United States, Iran, Turkey, and other regions.

Sources

  1. Merriam-Webster — https://www.merriam-webster.com/dictionary/pistachio
    Supports: Definition of pistachio as the tree *Pistacia vera* and its edible seed.
  2. Wikipedia — https://en.wikipedia.org/wiki/Pistachio
    Supports: Botanical classification, nutrition facts, origin, and production figures cited in the article.
  3. Cambridge Dictionary — https://dictionary.cambridge.org/dictionary/english/pistachio
    Supports: Common English meaning of pistachio as an edible nut/seed.
  4. New World Encyclopedia — https://www.newworldencyclopedia.org/entry/Pistachio
    Supports: Explanation that pistachio is botanically a seed of a drupe, not a true nut.
  5. Wikipédia — https://www.fr.wikipedia.org/wiki/Pistacia_vera
    Supports: Origin and long history of cultivation in Iran and the Middle East.