Leaf Bases: Acute
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Apple Serviceberry
(Amelanchier x grandiflora)

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Common Sweetshrub
(Calycanthus floridus)

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Common Periwinkle
(Vinca minor)

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Gray Birch
(Betula populifolia)



Acute Leaf Base

An angle that is less than 90º with straight lines and is wider than cuneate. It is roughly equivalent to wide cuneate. The term acute is more commonly used for apices.

The leaf base of the Apple Serviceberry can be described as either wide cuneate or acute.

Botanical Terminology > Leaf Bases > Acute