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银杏叶为银杏科植物银杏Ginkgobiloba L.的干燥叶。夏季采收其叶,干燥。 银杏为现存的古代子遗植物之一,是我国特有的天然药用资源。《本草纲目》李时珍曰“叶似鸭掌,因名鸭脚。”宋初改呼银杏,因其形似小杏而核色白也,又名白果。银杏为落叶乔木。叶簇生于短枝,或螺旋状散生于长枝上,扇形。无明显中脉,具多数2分歧平行脉,两面均为黄绿色,叶柄长。叶片中央常浅裂或深裂。花单性异株,稀同株。雄球花成葇荑花序,雌球花有长梗,每叉端生一胚珠,
Ginkgo biloba is a dry leaf of Ginkgo biloba Ginkgobiloba L. plant. The leaves are harvested in the summer and dried. Ginkgo biloba is one of the existing ancient relict plants and is a unique natural medicinal resource in China. “Compendium of Materia Medica” Li Shizhen said, “The leaves resemble duck’s feet, because of the name of the duck feet.” In the early Song Dynasty, the name Ginkgo biloba was changed. Because it resembles apricot and nuclear white, also known as ginkgo. Ginkgo biloba is a deciduous tree. Leaves clustered on short branches, or spirally scattered on long branches, fan-shaped. There is no obvious midrib, with a majority of 2 divergent parallel veins, both yellow-green on both sides, petiole length. The center of the blade is often shallow or cracked. Flowers unisexual and dilute. The male globules grow into inflorescences, the female globules have long stalks, and each ovule produces an ovule.