Common name: Japanese Knotweed
Scientific name: Fallopia japonica 虎杖，日本虎杖*
Genus: Fallopia 何首烏屬
Family: Polygonaceae 蓼科, knotweed or smartweed-buckwheat family
Origin: Neophyte (established after 1500 AD). It is a native of E. Asia. It has been grown in gardens since 1825 and was first recorded in the wild in 1886.
Remarks*: It is also recorded as exotic species in HK.
Remarks*: It is also recorded as exotic species in HK.
Date: 22nd Aug
26th July
flower buds (15th Aug)
raining.....
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