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How to Manage Pests

The UC Guide to Healthy Lawns

Leaf arrangements

Leaves are arranged along the stem in a variety of ways.

Leaves are opposite (2 leaves per node) Leaves are whorled (3 or more leaves arranged around a node) Leaves are alternate (1 leaf per node) Leaves form a basal rosette (1 leaf per node, but clustered around the stem at ground level)
Opposite leaves
Whorled leaves
Alternating leaves
A basal rosette

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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