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Tan Oak Acorn

Lithocarpus densiflorus


A tanoak seed is similar to an oak acorn, about 0.75 in. long with a shallow, hairy cup. There are about 110 acorns/lb. Tanoak seed may be collected from late September to mid-November. Early acorns are often infested with insects; later acorns are generally sound, especially in a mast (high seed production) year. Acorns should be collected soon after they fall to reduce losses in viability from exposure to heat or drying. Germination and seedling emergence usually occur in spring. Acorns should be planted immediately or stored under cool, moist conditions (33 to 34° F) until spring planting. Estimates of germination rate vary from 19 to 80 percent. Acorns should be planted with the pointed end up.


Mountainous riparian woodlands of Gasquet, California and surrounding areas.

Notes: My 3rd photo is of weevil infestaion.

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maplemoth662 2 years ago

Photo No. 2: is a very interesting, and a very educational photo....

One of your pictures has been removed as it violates our FAQs and Terms and Conditions. Please refer to these at and and ensure that all your pictures comply. If you wish to post such pictures please join our Project Noah Facebook page at as the rules there are more relaxed. Our main program is a database for all living organisms (except humans) in their natural habitat. Photographs of windfalls on the ground are OK but picked fruit is not so your bowl of acorns is a bit borderline also.

Spotted by

California, USA

Spotted on Sep 13, 2015
Submitted on Mar 23, 2018

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