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	Bidens cernua  L.

Fam.: Asteraceae / Composite Fam.

Genus:  Bidens  L.

Authors:
	L.:		Carl von Linné (Linnaeus, 1707 - 1777), Swedish naturalist who introduced the binary naming system for plants and animals

Etymology:
	Bidens:		bis = double, dens = tooth
	cernua:		nutant

Fig. 1:  Bidens cernua / Nodding Bur-Marigold D Wiesbaden 22.9.2012

Fig. 2:  Bidens cernua / Nodding Bur-Marigold D Wiesbaden 22.9.2012

Fig. 3:  Bidens cernua / Nodding Bur-Marigold D Wiesbaden 22.9.2012

Fig. 4:  Bidens cernua / Nodding Bur-Marigold D Wiesbaden 22.9.2012

Fig. 5:  Bidens cernua / Nodding Bur-Marigold D Wiesbaden 22.9.2012

Fig. 6:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 7:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 8:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 9:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 10:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 11:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 12:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 29.8.2009

Fig. 13:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 26.9.2009

Fig. 14:  Bidens cernua / Nodding Bur-Marigold (another site) D Karlsruhe 3.10.2015

Fig. 15:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 3.10.2015

Fig. 16:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 3.10.2015

Fig. 17:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 3.10.2015

Fig. 18:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 3.10.2015

Fig. 19:  Bidens cernua / Nodding Bur-Marigold D Karlsruhe 3.10.2015

Fig. 20:  Bidens cernua / Nodding Bur-Marigold D Biblis 28.9.2015

Fig. 21:  Bidens cernua / Nodding Bur-Marigold D Biblis 28.9.2015

Fig. 22:  Bidens cernua / Nodding Bur-Marigold D Biblis 28.9.2015

Fig. 23:  Bidens cernua / Nodding Bur-Marigold D Mannheim 18.9.2006

Fig. 24:  Bidens cernua / Nodding Bur-Marigold D Mannheim 18.9.2006

Fig. 25:  Bidens cernua / Nodding Bur-Marigold D Mannheim 18.9.2006

Fig. 26:  Bidens cernua / Nodding Bur-Marigold D Burghaun 8.9.2020

Fig. 27:  Bidens cernua / Nodding Bur-Marigold D Burghaun 8.9.2020

Fig. 28:  Bidens cernua / Nodding Bur-Marigold D Donaueschingen 6.9.2016

Fig. 29:  Bidens cernua / Nodding Bur-Marigold D Donaueschingen 6.9.2016

Fig. 30:  Bidens cernua / Nodding Bur-Marigold F Sundgau 6.10.2009

Fig. 31:  Bidens cernua / Nodding Bur-Marigold F Sundgau 6.10.2009

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Copyright: Use of the images and texts only with the author's written permission.