樟科无根藤属,是一类分布广、危害严重的藤本寄生杂草。分布于热带、亚热带地区,此属约15种,我国只有无根藤(Cassytha filiformis L.)一种,又称过天藤、无根草、流离网、飞扬藤、黄鱼藤、罗网藤、雾水藤、蜈蚣藤、青丝藤、半天云、无头藤、无娘藤、无地生根等。在我国分布于云南、贵州、四川、广西、广东、海南、湖南、江西、福建、浙江、台湾等省区。无根藤常寄生在乔木、灌木及草本植物上,其危害农林业生产的严重性,尚未引 Lauraceae without root rattan, is a wide distribution, serious damage to the vine parasitic weeds. Distributed in the tropical and subtropical regions, this is about 15 species, only rootless vine (Cassytha filiformis L.) in our country, also known as Tiantan, rootless grass, flowering net, flying Yang vine, yellow cane vine, Water rattan, centipede rattan, black silk rattan, half-day cloud, headless rattan, no mother vine, no ground and so on. Distributed in our country in Yunnan, Guizhou, Sichuan, Guangxi, Guangdong, Hainan, Hunan, Jiangxi, Fujian, Zhejiang, Taiwan and other provinces and autonomous regions. Rootless vine parasites often in the trees, shrubs and herbs, which endanger the seriousness of agriculture and forestry production has not been cited