Water hyacinth, also known as Eichhornia crassipes, is widely distributed in the Yangtze River and Yellow River basins and southern provinces in China. I like warm, humid and sunny environment, with strong adaptability and certain cold tolerance. I was born in ponds, ditches and rice fields at an altitude of 200- 1500m. Tropical Asia is also widely cultivated. Eichhornia crassipes has been introduced by many countries and widely distributed all over the world, and it has also been listed as one of the top 100 alien invasive species in the world. Whole grass is the feed of livestock and poultry; Young leaves and petioles can be used as vegetables.

The blue leaves of Eichhornia crassipes are clustered at the base and arranged in a rosette shape; The leaves are round and the surface is dark green; Petioles vary in length, and there are many air cells composed of polygonal columnar cells, among which vascular bundles are scattered, yellow-green to green; Petiole base has sheath-like yellow-green bracts; Scape with many edges; Spikes usually have 9- 12 flowers; Petals are purple-blue, the corolla is slightly symmetrical on both sides, the periphery is purple-red, the middle is blue, and there is a yellow spot of 1 in the center of blue, and the base of perianth segments is combined into a tube; Stamens adnate to perianth tube; Capsule ovoid. The flowering period is July -65438+ 10, and the fruiting period is August-165438+ 10.

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The function of water hyacinth

1, environmental protection

Eichhornia crassipes is a good plant for monitoring environmental pollution. It can monitor whether there is arsenic in water and purify harmful substances such as mercury, cadmium and lead in water. In the process of growth, it can absorb a lot of nutrients such as nitrogen and phosphorus and some heavy metal elements in water, and Eichhornia crassipes is more suitable for purifying industrial wastewater or domestic sewage with more organic matter.

2. Decorative function

Eichhornia crassipes is a floating herb with well-developed fibrous roots, short stems, light blue flowers, polygonal horns and large petals. There is an obvious bright yellow spot in the center of the petal, which is shaped like a phoenix eye and also like the spot at the end of a peacock feather. Very eye-catching, very beautiful. It is often used as a landscaping material for garden waterscape.

References:

Baidu encyclopedia-water hyacinth

References:

Baidu encyclopedia-Eichhornia crassipes