acropetal

[uh-krop-i-tl]
adjective Botany.
(of an inflorescence) developing upward, toward the apex.

Origin:
1870–75; acro- + -petal

acropetally, adverb
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World English Dictionary
acropetal (əˈkrɒpɪtəl)
 
adj
Compare basipetal (of leaves and flowers) produced in order from the base upwards so that the youngest are at the apex

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Flowering in lentils is acropetal, from the bottom of the plant to the top.
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