Acorn

English oak acorn
Acorns from small to large of the Willow Oak, Q. phellos (very small, at center); the Southern Red Oak, Q. falcata; the White Oak, Q. alba; the Scarlet Oak, Q. coccinea; from southern Greenville County, SC, USA. Scale bar at upper right is 1 centimetre (0.39 in).
Diagram of the anatomy of an acorn: A.) Cupule B.) Pericarp (fruit wall) C.) Seed coat (testa) D.) Cotyledons (2) E.) Plumule F.) Radicle G.) Remains of style. Together D., E., and F. make up the embryo.
Acorn, raw
Nutritional value per 100 g (3.5 oz)
Energy1,619 kJ (387 kcal)
40.75 g
23.85 g
Saturated3.102 g
Monounsaturated15.109 g
Polyunsaturated4.596 g
6.15 g
Tryptophan0.074 g
Threonine0.236 g
Isoleucine0.285 g
Leucine0.489 g
Lysine0.384 g
Methionine0.103 g
Cystine0.109 g
Phenylalanine0.269 g
Tyrosine0.187 g
Valine0.345 g
Arginine0.473 g
Histidine0.170 g
Alanine0.350 g
Aspartic acid0.635 g
Glutamic acid0.986 g
Glycine0.285 g
Proline0.246 g
Serine0.261 g
VitaminsQuantity
%DV
Vitamin A equiv.
0%
2 μg
Thiamine (B1)
9%
0.112 mg
Riboflavin (B2)
9%
0.118 mg
Niacin (B3)
11%
1.827 mg
Pantothenic acid (B5)
14%
0.715 mg
Vitamin B6
31%
0.528 mg
Folate (B9)
22%
87 μg
Vitamin C
0%
0.0 mg
MineralsQuantity
%DV
Calcium
3%
41 mg
Copper
69%
.621 mg
Iron
4%
0.79 mg
Magnesium
15%
62 mg
Manganese
58%
1.337 mg
Phosphorus
6%
79 mg
Potassium
18%
539 mg
Sodium
0%
0 mg
Zinc
5%
0.51 mg
Other constituentsQuantity
Water27.9 g

Percentages estimated using US recommendations for adults,[1] except for potassium, which is estimated based on expert recommendation from the National Academies.[2]
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The acorn, or oaknut, is the nut of the oaks and their close relatives (genera Quercus and Lithocarpus, in the family Fagaceae). It usually contains a seedling surrounded by two cotyledons (seedling leaves), enclosed in a tough shell known as the pericarp, and borne in a cup-shaped cupule.[3][4] Acorns are 1–6 cm (122+12 in) long and 0.8–4 cm (381+58 in) on the fat side. Acorns take between 5 and 24 months (depending on the species) to mature; see the list of Quercus species for details of oak classification, in which acorn morphology and phenology are important factors.

  1. ^ United States Food and Drug Administration (2024). "Daily Value on the Nutrition and Supplement Facts Labels". Retrieved 28 March 2024.
  2. ^ National Academies of Sciences, Engineering, and Medicine; Health and Medicine Division; Food and Nutrition Board; Committee to Review the Dietary Reference Intakes for Sodium and Potassium (2019). Oria, Maria; Harrison, Meghan; Stallings, Virginia A. (eds.). Dietary Reference Intakes for Sodium and Potassium. The National Academies Collection: Reports funded by National Institutes of Health. Washington, DC: National Academies Press (US). ISBN 978-0-309-48834-1. PMID 30844154.
  3. ^ Dietland Müller-Schwarze (2009). Hands-On Chemical Ecology:: Simple Field and Laboratory Exercises. Springer Science & Business Media. p. 32. ISBN 978-1-4419-0378-5.
  4. ^ "Acorn | Definition & Facts". Encyclopedia Britannica. Retrieved 28 April 2024.

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