白桦花序在森林和白色桦树树干的背景下。春季森林背景，带有盛开的桦树

黑桦猫柳

桦树花序

悬挂的桦树花序和芽

桦树柔荑花序

垂枝桦树花序

birch catkins on a branch macro shot of and young green leaves thin in spring

覆盖着积雪的开花桦树花序

桦树花序

早春桦树花序

春天与嫩新的叶子特写镜头的桦树柔荑花

春季背景，带有桦树猫尾

与桦树柔荑花分支的春天背景

vertical close up of spring birch catkins with fresh green leaves in sunlight a vibrant showcasing yellow hanging from slender

桦树柔荑花

与桦树柔荑花分支的春天背景

blooming birch catkins during an unexpected snowfall background

春天的桦树花序在没有树叶的树枝上，背景是蓝色的天空。桦树花序作为过敏原，横幅。一片绿叶，一片新的

春天的桦树花序在没有树叶的树枝上，背景是蓝色的天空。桦树花序作为过敏原，横幅。一片绿叶，一个新的

春季桦树花序在没有树叶的树枝上，背景是蓝天。桦树花序作为过敏原，横幅。一片绿叶，一片新的

birch catkins releasing pollen in spring ai generated are into the air during springtime highlighting onset of seasonal allergies. birch catkins releasing pollen in spring are into the air during springtime highlighting onset of seasonal allergies 免版税库存图片

birch catkins releasing pollen in spring ai generated are into the air during springtime highlighting onset of seasonal allergies. birch catkins releasing pollen in spring are into the air during springtime highlighting onset of seasonal allergies 免版税库存照片

birch catkins releasing pollen in spring ai generated are into the air during springtime highlighting onset of seasonal allergies. birch catkins releasing pollen in spring are into the air during springtime highlighting onset of seasonal allergies 免版税库存图片

棕色的桦树花序从树枝上轻轻垂下，背景是柔和的蓝色天空

早春时节树枝上的桦树花序

春天的桦树花序

桦树猫柳花苞在树上

birch catkins and leaves close up close up of birch catkins and leaves in a natural springtime setting

年轻叶子和绿色桦树柔荑花

lush green birch catkins and leaves in springtime sunlight lush green birch catkins and leaves in springtime sunlight

早春桦树花序

平地产有鹌鹑蛋、桦木牛和柳枝

桦树柔荑花在早期的春天

树枝上春 — 桦树卡特金起伏的标志

树枝上春 — 桦树卡特金起伏的标志

在雪的桦树柔荑花

绿色的桦树花序释放花粉，导致季节性过敏

桦树花序上的花粉

在雪下的桦树柔荑花

新鲜的绿色桦树花序从树枝上垂下来，预示着春天的开始

桦树柔荑花