Coleoptile

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

The coleoptile is a pointed protective sheath covering the emerging shoot in monocotyledons such as grasses in which few leaf primordia and shoot apex of monocot embryo remain enclosed. The coleoptile protects the first leaf as well as the growing stem in seedlings and eventually, allows the first leaf to emerge.

Excerpt from the Wikipedia article “Coleoptile”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Audrius Meskauskas, CC BY-SA 3.0, via Wikimedia Commons.