The following species are listed in order of importance:

Tree Name Species Name Information Image
Northern Red Oak Quercus rubra Seed matures and is dispersed in September and October. Acorns: 5/8-1 1/8" long; egg shaped, less than 1/3 enclosed by broad cup of reddish-brown, blunt, tightly overlapping scales; maturing second year.
White Oak Quercus alba Seed matures and is dispersed in September and October. Acorns: 1/2" – 1 1/4" long; egg shaped; about 1/4 enclosed by shallow cup; becoming light gray to brown; with warty, finely hairy scales; maturing first year.
Willow Oak Quercus phellos Seed matures and is dispersed in August to October. Acorns: 3/8"-1/2" long and broad; nearly round, with shallow saucer shaped cup; becoming brown when mature; maturing second year.
Pin Oak Quercus palustris Seed matures in September and October, and disperses in September to November. Acorns: 1/2" long and broad; nearly round; becoming brown when mature; 1/4 to 1/3 enclosed by thin saucer-shaped cup tapering to base; maturing second year.
Overcup Oak Quercus lyrata Seed matures and is dispersed in September and October. Acorns: 1/2" to 1" long; nearly round, almost enclosed by large rounded cup of warty gray scales, the upper scales long-pointed; usually stalkless; maturing first year.
Water Oak Quercus nigra Seed matures and is dispersed in August to October. Acorns: 3/8"-5/8" long and broad; nearly round, with shallow, saucer shaped cup; becoming brown when mature; maturing second year.
Swamp Chestnut Oak Quercus michauxii Seed matures and is dispersed in September and October. Acorns: 1-1 1/4" long; egg shaped, 1/3 or more enclosed by deep thick cup with broad base, composed of many overlapping hairy brown scales; stalkless or short-stalked; maturing first year.
Southern Red Oak Quercus falcata Matures in September to October. Acorns: 1/2"-5/8" long; elliptical or rounded; becoming brown when mature; 1/3 or more enclosed by cup tapering to broad stalklike base; maturing second year. Often with striations.

Other acceptable species include:

Tree Name Species Name Information Image
Black Oak Quercus velutina Seed matures and is dispersed in September and October. Acorns: Ovoid acorns, 1/2 to 3/4 inch long, 1/3 to 1/2 enclosed in a bowl-shaped cap; cap scales are loosely appressed (particularly loose on edges of cap), light brown and fuzzy; maturing second year.
Chestnut Oak Quercus prinus Acorns are 1 to 1 1/2 inches long, ovoid in shape and separate from the cap when mature; cap is thin, warty and shaped like a teacup, edges of cap are very thin; maturing first year.
Post Oak Quercus stellata Acorns are 1/2 to 2/3 inches long and ovoid; cap is bowl-shaped and warty/scaly, covering 1/3 to 1/2 of the nut; Individual scales are more apparent than white oak; maturing first year.
Cherrybark Oak Quercus pagoda Acorns are 1/2 inch long, orange-brown, pubescent when young; scaly, somewhat pubescent cap covers about 1/3 of the nut; matures in fall after two years.