无冠毛的

例句：

1. 1. The grass is very tall, but it has no thorns.
   草很高，但不长刺。
2. 2. The apple tree is covered in small thorns, making it hard to pick the fruit.
   苹果树长满了小刺，很难摘到果实。
3. 3. The flowers have no petals or pistils, making them look different from other flowers.
   这些花没有花瓣或雄蕊，看起来与其他花不同。