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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.
http://owic.oregonstate.edu/tanoak-litho... My 3rd photo is of weevil infestaion.