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世界上叶片最大的双子叶植物、是原产于南美洲亚马逊河支流和小河湾里的王莲(Victoria amazonica)。它的叶片象个平底的大盘子,四周围向上卷起,上面绿色光滑,背面棕红色,粗壮的叶柄可以把叶片送到5米以外的水面,叶片直径可达2.5米。世界上最小的被子植物,是浮萍科的无根萍(Wolffiaarrhiza)。它的整个植物体只有一团细胞,却照样开花结籽。照片边上是一根直径0.5毫米的铅笔芯,可见无根萍
The world’s largest leaf dicotyledon, native to the Amazon tributaries and creek in South America Victoria (Victoria amazonica). Its blades resembled flat-bottomed plates, rolled up all around, with a smooth green top and a reddish brown back. The stout petiole allowed the leaves to reach the water beyond 5 meters, with leaf diameters of up to 2.5 meters. The smallest angiosperm in the world, Wolffiaarrhiza of the family Pistia. Its entire plant body has only a group of cells, but still flowering seed. The edge of the photo is a 0.5 mm diameter pencil lead, showing no roots