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	Ceratophyllum demersum  L.

Fam.: Ceratophyllaceae / Hornwort Fam.

Genus:  Ceratophyllum  L.

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

Etymology:
	Ceratophyllum:		keratos = horn, phyllon = leaf
	demersum:		immersed

Fig. 1:  Ceratophyllum demersum / Rigid Hornwort D Karlsruhe 31.7.2008

Fig. 2:  Ceratophyllum demersum / Rigid Hornwort D Karlsruhe 31.7.2008

Fig. 3:  Ceratophyllum demersum / Rigid Hornwort D Karlsruhe 31.7.2008

Fig. 4:  Ceratophyllum demersum / Rigid Hornwort D Karlsruhe 31.7.2008

Fig. 5:  Ceratophyllum demersum / Rigid Hornwort D Karlsruhe 31.7.2008

Fig. 6:  Ceratophyllum demersum / Rigid Hornwort D Karlsruhe 28.9.2008

Fig. 7:  Ceratophyllum demersum / Rigid Hornwort D Mannheim 21.9.2008

Fig. 8:  Ceratophyllum demersum / Rigid Hornwort D Mannheim 21.9.2008

Fig. 9:  Ceratophyllum demersum / Rigid Hornwort D Ludwigshafen 9.9.2017

Fig. 10:  Ceratophyllum demersum / Rigid Hornwort D Ludwigshafen 9.9.2017

Fig. 11:  Ceratophyllum demersum / Rigid Hornwort D Ludwigshafen 9.9.2017

Fig. 12:  Ceratophyllum demersum / Rigid Hornwort D Kelsterbach 15.9.2012

Fig. 13:  Ceratophyllum demersum / Rigid Hornwort D Kelsterbach 15.9.2012

Fig. 14:  Ceratophyllum demersum / Rigid Hornwort D Kelsterbach 15.9.2012

Fig. 15:  Ceratophyllum demersum / Rigid Hornwort D Kelsterbach 15.9.2012

Fig. 16:  Ceratophyllum demersum / Rigid Hornwort D Kelsterbach 15.9.2012

Fig. 17:  Ceratophyllum demersum ? / Rigid Hornwort F Pyrenees, Mont Louis 3.8.2018

Fig. 18:  Ceratophyllum demersum ? / Rigid Hornwort F Pyrenees, Mont Louis 3.8.2018

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