Amaranthus retroflexus

mar菜（Amaranthus retroflexus）是A菜科（Amaranthaceae）中的一种开花植物，有几种通用名称，包括红根Red菜（Red-root Amaranth），红根紫菜（Redrooted Pigweed），红根藜草，普通A菜和普通翻滚杂草。
True to its name, it forms a tumbleweed.It is native to the tropical Americas but it is widespread as an introduced species on most continents in a great number of habitats.顾名思义，它形成了风滚草。它原产于热带美洲，但在大多数大陆的许多生境中作为引种而广泛传播。 This is an erect annual herb reaching a maximum height near 3 meters.这是一种直立的一年生草本植物，最大高度接近15米。 The leaves are nearly 2 centimeters long on large individuals, the ones higher on the stem having a lance shape and those lower on the plant diamond or oval in shape.大个体的叶子长约XNUMX厘米，茎上较高的叶子呈长矛状，而植物菱形或椭圆形则较低。 The plant is monoecious, with individuals bearing both male and female flowers.该植物雌雄同株，个体具雄花和雌花。 The inflorescence is a large, dense cluster of flowers interspersed with spiny green bracts.花序是一簇大而密集的花，上面散布着多刺的绿色green片。 The fruit is a capsule less than XNUMX millimeters long with a "lid" which opens to reveal a tiny black seed.果实是小于XNUMX毫米长的带有“盖”的胶囊，该盖打开后露出微小的黑色种子。