以下为句子列表：
英文: Bundle sheath The ring of parenchymatous or sclerenchymatous tissue, usually one cell thick, that surrounds the vascular bundle in an angiosperm leaf.
中文: 维管束鞘：在被子植物叶中，围绕维管束的通常是一层薄壁或厚壁细胞。
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英文: Chalaza (pl.chalaxae or chalazas) The region of an angiosperm ovule where the nucellus and integuments merge.
中文: 合点：被子植物胚珠上的一个区域，在合点处珠心和珠被愈合。
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英文: For example, the basic angiosperm stem is vertical and elongated, but some cacti have swollen water-storing stems, while other xerophytic plants that have lost their leaves during the course of evolution have evolved flattened leaflike stems for photosynt
中文: 例如被子植物的茎是垂直的，伸长的，但一些仙人掌具有膨大的能够储水的茎，另一些旱生植物在进化的过程中失去了叶子，但又发展为利用扁平叶状的茎来进行光合作用（假叶树）。
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英文: Funicle (funiculus) The stalk attaching the ovule (later the seed) to the placenta in angiosperm ovaries. Nutrients pass through the funicle to the ovule and seed.
中文: 珠柄：被子植物子房中连接胚珠（之后的种子）和胎座的柄。营养物质通过珠柄传递到胚珠和种子。
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英文: Heteranthery exists in several angiosperm families, such as Melastomataceae, Solanaceae, Lytbraceae, Leguminosae and Pontederiaceae, but the aspects and extent of differentiation often vary in taxa.
中文: 异型雄蕊在野牡丹科、茄科、千屈菜科、豆科、雨久花科等多个科中都有分布，但其分化与程度常随类群而异。
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