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单词 Astipulate
释义

Astipulate

英语百科

Stipule

 Glandular stipule of Euphorbia pteroneura
 Stipular spines on the mesquite tree (Prosopis pallida)
 Fused together and leaf-like stipules of Alchemilla mollis
 Leafy stipules at the base of a Rose leaf (Rosa canina)

In botany, stipule (Latin stipula: straw, stalk) is a term coined by Linnaeus which refers to outgrowths borne on either side (sometimes just one side) of the base of a leafstalk (the petiole). A pair of stipules is considered part of the anatomy of the leaf of a typical flowering plant, although in many species the stipules are inconspicuous or entirely absent (and the leaf is then termed exstipulate).

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更新时间:2025/6/20 17:12:36