一般植物的茎多是圆柱形直立的,但也有许多植物,因生活在各种不同的复杂环境中,长期适应各种特殊的生活条件,而在茎的形态构造和功能上,发生了种种变异,称为变态茎.它有时使人不易辨认,但是只要运用植物形态科学知识,也就能识别出来,下面就介绍一些常见的变态 Most plant stems are mostly cylindrical and upright, but many plants, because they live in various complex environments, adapt to various special living conditions for a long time. However, many morphological changes occur in the morphological structure and function of stems , Sometimes referred to as metamorphosis stems, which at times are not easily identifiable, but as long as the scientific knowledge of plant morphology is used, it can be identified. Here are some common metamorphoses