Petiole (botany)

In botany, the petiole (/ˈpiːti.oʊl/) is the stalk that attaches the leaf blade to the stem.^[1]^: 87^[2]^: 171 It is able to twist the leaf to face the sun, producing a characteristic foliage arrangement (spacing of blades), and also optimizing its exposure to sunlight.^[3]^[4] Outgrowths appearing on each side of the petiole in some species are called stipules. The terms petiolate and apetiolate are applied respectively to leaves with and without petioles.

^ Beentje, H. (2010). The Kew plant glossary. London: Kew Publishing. ISBN 9781842464229.
^ Mauseth, James D (2003). Botany: An Introduction to Plant Biology. Jones & Bartlett Learning. ISBN 0-7637-2134-4.
^ Cite error: The named reference CAPON was invoked but never defined (see the help page).
^ Cite error: The named reference TAFENSW was invoked but never defined (see the help page).

[Beentje-1] Beentje, H. (2010). The Kew plant glossary. London: Kew Publishing. ISBN 9781842464229.

[Mauseth-2] Mauseth, James D (2003). Botany: An Introduction to Plant Biology. Jones & Bartlett Learning. ISBN 0-7637-2134-4.

[CAPON-3] Cite error: The named reference CAPON was invoked but never defined (see the help page).

[TAFENSW-4] Cite error: The named reference TAFENSW was invoked but never defined (see the help page).

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