Ring Porous  - Ring porous wood such as, oak, elm, chestnut and black locust, are angiosperms that have large diameter vessels in the first portion of the growth increment and vessels of smaller diameter later in the growth increment.   Free water moves only in the latewood of the current increment during the end of the growth period in some tyloses- forming species of ring-porous trees such as American elm.

Picture is a young red oak and ring porous.

Click here for wood types.

See TREE ANATOMY, SHIGO, 1994

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