Wild plants in and around Shimane 島根とその周辺の野生植物

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Bidens frondosa / Amerikasendangusa アメリカセンダングサ

Bloom time: September-October

   
Family:
 
Asteraceae /
 Kikuka


 

Notes For Reference:-

Species, Varieties, or Forms in the Genus Bidens:

Bidens biternata / Sendangusa
Bidens frondosa / Amerikasendangusa
Bidens pilosa var. minor / Koshinorosendangusa


 
   

Bidens frondosa / Amerikasendangusa アメリカセンダングサ

 

Bidens frondosa, an annual herb originating in North America, occurs in damp wastelands or roadsides in various districts. Dark purple stems with four ridges grow to 0.5-1.5cm in height. Leaves with long petioles have opposite phyllotaxis; the lower parts are biternate compounds, and those on the upper ones are ternate compound leaves. The leaflets all have petiolules, 3-13cm-long oval-like lanceolates, with tips pointed and margins with serrations. Flower heads are yellow and set themselves singly on branch tips. Involucral bracts are 6-12 in number and significantly large and conspicuous. Bloom time: September-October.

               
                     
                     
                     

AUTUMN #2

 

 

inserted by FC2 system