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37 Cards in this Set

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  • Back
Outer rings of xylem that still transport xylem sap
Fibrous, durable wood, often from dicot trees such as hickory, maple, and oak
Of lumber, refers to the sizes of the cells in the xylem and phloem and to the sizes of growth rings: maybe coarse, fine, or uneven
Secondary growth, or tissue that produces new dermal tissue; Also known as phellogen.
Cork Cambium
A secondary meristem that produces secondary xylem and secondary phloem.
Vascular Cambium
A small opening in the thin cork layer of outer bark of stems and roots that allows gas exchange
The science of tree-ring dating and climate interpretation
Produced by trimming a tangential cut of lumber.
Plain-Sawed Board
Removal of the entire bark in a complete ring around the tree. disrupts phloem transport and kills the tree
Consists of dead tissue including dead secondary phloem and all the layers of periderm outside of the most recent cork cambium
Outer Bark
The direction of a lumber cut that passes longitudinally through the center of the stem
Radial Cut
The ratio of a wood's weight to the weight of an equal volume of water at room temperature
Specific Gravity
Of lumber, the overall alignment of the conducting cells of xylem; can be straight grained, cross grained, spiral grained, or interlocking grained
A thin lumber section, produced by an angled continuous tangential cut
A thin layer of living parenchyma cells that forms to the inside of each cork cambium layer
Direction of a lumber cut that is longitudinal but crosses the radius at a right angle instead of passing through the center of the stem
Tangential Cut
Tissue consisting of living secondary phloem, dead phloem between the vascular cambium and the currently active, innermost cork cambium, and any remaining cortex
Inner Bark
Tissue that forms to the outside of the cork cambium and consists of dead cells when mature
An initial that arises within vascular bundles and produces new xylem and phloem cells
Fusiform Initial
All tissues outside the vascular cambium; the part of a stem or root surrounding the wood
The amount of matter per a unit of volume, realted to a wood's hardness
Waterproof, fatty substance that coats and impregnates cork cell walls
Produced by trimming a radial cut of lumber
Quarter-Sawed Board
The extent to which wood is resistant to breakdown and decay by fungi, bacteria, and insects
The percent of water by weight in wood
Water Content
Tension or compression wood that develops trunks or branches that are leaning
Reaction Wood
Secondary xylem
Wood with few fibers and no vessels, typically conifers
A direction of cutting lumber to give a circular cross section
Transverse Cut
Older, nonconducting rings of xylem at the center of a tree's trunk or roots
An initial that arises between vascular bundles; often cube shaped
Ray Initial
The section of a gene that interrupts or seperates coding regions
A group of petals on a flower
Also called a grain; a single dry, indehiscent, achene-like fruit with a hard pericarp joined firmly to the seet coat
An irregular flower, typically bisymmetrical
The first two stages of gamete cell division; results in cells with half the number of chromosones in the orginal cell
Meiosis 1
A dry, dehiscent fruit produced in the mustard family; consists of two carpels that split into two halves, with the seeds found on a central partition between the halves