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UC IPM Home > Weed Photo Gallery > Identification Characteristics of Broadleaves > Leaf arrangements

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How to Manage Pests

Identification: Characteristics of Broadleaves

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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)
Opposite leaves Whorled leaves
Leaves are alternate
(1 leaf per node)		 Leaves form a basal rosette
(1 leaf per node, but clustered
around the stem at ground level)
Alternating leaves A basal rosette

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