protophloem

American  

[proh-tuh-floh-em] / ˌproʊ təˈfloʊ ɛm /

noun

Botany.

1. the part of the primary phloem that develops first, consisting of narrow, thin-walled cells.

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protophloem Scientific  

/ prō′tə-flō′ĕm′ /

1. The first formed phloem that differentiates from the procambium.

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Etymology

Origin of protophloem

First recorded in 1880–85; proto- + phloem

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