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单词 Involucral bract
释义

Involucral bract

中文百科

苞片 Bract

(重定向自Involucral bract)
小鼻花(Rhinanthus minor)的纸质(上方)和叶质(下方)苞片。图中所有像叶片的构造都是苞片。
狼把草

在植物学中,苞片指一种特化的叶,通常位在生殖构造如花、花序轴或毬果的鳞片附近。苞片的外观通常在大小、颜色、形状或质地上和营养叶有所不同,也常和花的花萼或花瓣不同。在植物检索及分类上,是否具有苞片是重要的特征之一。

英语百科

Bract 苞片

(重定向自Involucral bract)
Papery (upper) and leafy bracts on hay rattle (Rhinanthus minor).  All the
Beggar-tick (Bidens comosa)

In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often (but not always) different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals and/or sepals. The state of having bracts is referred to as bracteate or bracteolate, and conversely the state of lacking them is referred to as ebracteate and ebracteolate, without bracts.

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更新时间:2025/6/21 5:14:12