Petioles

The roots, petioles and seeds of Arctium lappa L . ( compositae ) are used to different symptoms.

牛蒡为菊科牛蒡属两年生植物,其根 、 茎叶和果实均可入药.

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The variety is different from the typical one by having larger and thicker leaves with crenate or dentate margin, broadly winged petioles, broad-obovate or oblanceolate and serrate bracts, and lilac corollas with longitudinal yellow stripes in the throat.

该变种与原变种不同在于叶大而厚，边缘具圆齿或牙齿，叶柄具宽翅，苞片宽倒卵形或倒披针形，有锯齿，花冠淡紫色，喉部具黄色纵纹。

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Phyllodes are analogous to leaf blades, but are derived from petioles ( leaf stalks ) .

叶状柄与叶片是同功器官, 但它源于 叶柄.

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Description: Herbaceous vines, glabrous except for pubescent on stem nodes, petioles, and leaf margin.

形态特徵: 纤细草质藤本,除茎节 、 柄和叶缘被短柔毛外全株无毛.

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Young shoots, petioles, abaxial surface of leaves, inflorescence, calyces and pods densely tomentose.

嫩枝 、 叶柄 、 叶背 、 花序 、 花萼和荚果密被毡毛.

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The present study shows the mechanical properties of homogenate suspension from the leaves and petioles of Mimosa pudica by stress-shear hysteresis loops during shear stress.

该文旨在通过观察含羞草叶片和叶柄匀浆悬浮液的应力切变率滞后环变化，揭示含羞草的力学性质。

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Soluble oxalate was the predominant form of oxalate of spinach, which in leaves, petioles and shoots occupied 36.7% 83.5%, 79.0% 93.3% and 50.0%~ 83.0% of total oxalate.

可溶态草酸是菠菜体内草酸的主要形态，在叶片、叶柄及地上部中所占草酸总量的比例分别在36.7%8~3.5%，79.0%9~3.3%以及50.0%8~3.0%之间。

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Description: Scandent subshrubs , to 2 m tall , stems, petioles, and inflorescences thin pubescent, glabrescent.

形态特徵: 攀援灌木,长达2米, 茎 、 叶柄和花序疏被柔毛.

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Mimosa pudica is an ideal model for studying cell response to force because it sensitively closes its leaflets and bends its petioles when subjected to the action of force.

由于受力后叶子立即发生运动，含羞草是一个研究力对于生物细胞作用的良好模型。

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