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Bidens biternata, an annual herb that grows to 0.3-1.5m in height,
occurs in somewhat damp locations, such as roadsides or dry
riverbeds, with stems featuring four ridges and curly hairs. Leaves
on the upper parts are alternate, 9-15cm long, of mono- or
bi-pinnate compound leaf; the leaflets are oval with pointed tips
and fine serrations on the margins. Branch tips on the upper parts
bear 0.7-1 cm in diameter, yellow flower heads, and involucral
bracts that are 3-6.5cm long, linear with sharply pointed tips.
Bloom time: September-October. |
Wild plants in and around Shimane
島根とその周辺の野生植物
