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You are here: > Outdoor Learning Activities > Tree Rings for Art and Dendrology Studies > BLACK WALNUT TREE ROUND (Western Hardwood). |
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BLACK WALNUT TREE ROUND (Western Hardwood).
ITEM #: T-18080
PRICE: $2.79
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| Resource Description
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| BLACK WALNUT TREE ROUND (Western Hardwood). Over a dozen species of black walnut are found in North America. We offer both eastern and western varieties. Both show the characteristic dark walnut core. The western species we offer is the Arizona black walnut. This high quality tree branch cross section (disc or tree cookie) is perfect for studying seasonal tree rings to calculate the age of a tree or limb, identify tree anatomy (heartwood, sapwood, cambium and inner/outer bark layers), study different growth patterns (tree ring irregularities, evidence of branching) and variation in growth patterns and climatic variations over time. Each cross section is fine sanded on one side to assist in reading tree rings. Since there is variation among all of the rounds, looking at several specimens of each species provides for an optimal learning experience. Individual disc size ranges from 2” to 4” across by 1/4” to 3/8” thick. #T-18080.
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