Flying poplar grass?

Identification characteristics: stem height 30~60 (70) cm, brown or yellow-brown multicellular hirsute. Leaves opposite, lanceolate-oblong, long elliptic-ovate or ovate-lanceolate, 1-5cm long, 5-13mm wide, apex extremely pointed or obtuse, base slightly oblique, both surfaces pilose; margins serrulate above the middle, less or entire below the middle; petiole extremely short, 1-2mm long; inflorescences numerous, crowded at the leaf axils into a capitulum, sessile at the base or only with a very short stalk and pilose; involucre campanulate. height and diameter each ca. 1 mm, pilose, margin 5-lobed, lobes triangular-ovate; glands 4, subcupular, margins with white appendages; male flowers several, reaching slightly to the margin of the involucre; female flower 1, shortly pedicellate, protruding beyond the involucre; ovary trigonous, sparsely pilose; styles 3, separate; stigmas 2-lobed. Capsule trigonous, ca. 1-1.5 mm in diam., pubescent, splitting into 3 schizocarps at maturity. Seeds subcircularly quadrangular, with several longitudinal scars on each prism, without caruncle. Biological Characteristics: Annual herb, often growing in farmland, wasteland, roadsides and other sandy soil. Flowering and fruiting period from June to December. Seed reproduction. Origin: tropical Africa; now widely distributed in tropical subtropical areas. Distribution in China: Zhejiang, Fujian, Taiwan, Guangdong, Hong Kong, Hainan, Guangxi, Jiangxi, Hunan, Hubei, Sichuan, Chongqing, Guizhou, Yunnan. Reasons for introduction and spread and hazards: first specimens were taken in 1820 in Macao. Common weed of dry fields and lawns. The whole plant is poisonous and has a diarrhea-causing effect.w Control methods: Sodium methylarsenate can be used as well as broadleaf herbicides such as 2,4-D to prevent and eliminate.

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