![Japanese knotweed [Polygonum cuspidatum]](/images/September/Yellow/thumbnail_IMG_0361.jpg "Japanese knotweed [Polygonum cuspidatum]")
Common Name:
Japanese knotweed
Scientic Name:
Polygonum cuspidatum
Colors:
Yellow
Months Appearing:
September
Invasive, non-native plant. Difficult to eradicate. Also called Fallopia japanica. Common name Japanese bamboo in Michigan.
3-10 feet tall. Shrub. Fast growing. Hollow, bamboo-like stems in dense stands.
Flower in spikes up to 1 ft high. Pointed superiorly.1/8 inch in diameter. 5 petals.
Partially wooded ares. Roadsides. Behind St Pauls Church, Big Rapids, Mi, September 5 0362, 0361, 0363