What is the smallest nut on our planet?

Question

What is the smallest nut on our planet?

Answer 1

The fruits of the following plants are very small nuts:

Calopsis paniculata

http://www.plantzafrica.com/plantqrs/res...

Parietaria judaica

http://www.sydneyweeds.org.au/docs/Syd-C...

Betula species

http://en.wikipedia.org/wiki/Birch

Cynomorium species

http://www.parasiticplants.siu.edu/Cynom...

Not to forget the tiny nuts on strawberries

http://en.wikipedia.org/wiki/Strawberrie...

But there is not to find any rating, size ( in mm f.e. ) or size comparison.

The world's biggest sledgehammer is always being used to crack all these very small nuts, it does not matter, which one is the smallest.

By the way Coco-de-Mer is the largest nut on our planet:

http://www.seabean.com/guide/Lodoicea_ma...

Answer 2

I'm not sure if you mean true nuts or nut-like also so I listed those commonly sold as edible nuts. Almonds are drupes. Pecans and walnuts are botanically called drupes by some and nuts by others but for commercial purposes are sold as nuts. Brazil nuts are seeds with a very hard capsule. Hazels, acorns, chinquapin and chestnuts are true nuts.

http://waynesword.palomar.edu/termfr2.ht...

The worlds smallest seeds are from the Wolffia plants, Wolffia angusta & Wolffia globosa. Each seed is the size of a grain of salt or 0.3mm.

http://waynesword.palomar.edu/ww0601.htm...

One way to compare sizes is by counting the number of nuts per ounce.

Pine nuts are perhaps the smallest at 5x10mm depending on the tree species but are not true nuts, they are classed as seeds botanically. ~150 /oz

pistachios 45-49/oz - seed

20- 24 almonds /oz - drupe

6-8 brazil nuts/oz- seed

pecans 8- 10/oz - drupe

walnuts 5-7/oz - drupe

The beech tree produces a small true nut about 15 -20 mm by 7mm in a small triangular shape. It comes in a spiky involucre  holding two nuts.

http://www.bluemts.com.au/mounttomah/wee...

The manketti  or mongongo nut is about the same size as a filbert or hazel nut. ~10 nuts/oz

Juglans butternut tree - related to walnut - drupe

http://www.cas.vanderbilt.edu/bioimages/...

Chinquapin

http://www.aaronscanna-amaryllis.com/pro...

Kukui and Tagua nuts are used in jewelry or buttons

http://waynesword.palomar.edu/pljan99.ht...

Answer 3

I think it's the one on the back of George Bush's head that holds his brain in place!!!!