Equisetum fluviatile L.
(Water Horsetail)

Taxonomic hierarchy:
SpeciesEquisetum fluviatile (Water Horsetail)
GenusEquisetum (horsetails)
FamilyEQUISETACEAE (horsetails)
OrderEQUISETALES (an order of horsetails)
ClassEQUISETOPSIDA (a class of horsetails)
PhylumPTERIDOPHYTA (ferns and allies)
SubkingdomVIRIDIPLANTAE (lower green plants)
KingdomPLANTAE (plants)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Equisetum fluviatile (Water Horsetail) :
1: Equisetum fluviatile (Water Horsetail)
21 Apr 2011 OSGR: SD77 54° 10’ N, 2° 20’ W Vice County: Mid-west Yorks (VC 64) England
in stream
Image 1: In habitat - in streamImage 2: In habitat - in stream (2)Image 3: In habitat - in stream (3)Image 4: In habitat - in stream (4)Image 5: Leaf sheath - close-up - magnified - white backgroundImage 6: Leaf sheath - close-up - magnified - white background (2)Image 7: Stem - close-up - enlargedImage 8: Stem - close-up - enlarged - white backgroundImage 9: Stem - close-up - enlarged - white background (2)Image 10: Stem - cross-section - magnified - white backgroundImage 11: Stem section - magnified - grey backgroundImage 12: Stem section - magnified - grey background (2)
2: Equisetum fluviatile (Water Horsetail)
20 May 2008 OSGR: NR83 55° 30’ N, 5° 20’ W Vice County: Clyde Islands (VC 100) Scotland
growing in small river near sea . Photos: in situ, close-ups, stem cross-section, spores
Image 1: Colony - in situ at side of streamImage 2: Colony - in situ at side of stream (2)Image 3: Colony - in situ at side of stream (3)Image 4: Colony - in situ at side of stream (4)Image 5: Colony - in situ at side of stream (5)Image 6: Cone - close-upImage 7: Cone - close-up - pale backgroundImage 8: Cone - close-up - pale background (2)Image 9: Fertile and sterile stems - pale backgroundImage 10: Fertile stem apices - pale backgroundImage 11: Growing at side of stream, with reflections - in situImage 12: Growing at side of stream, with reflections - in situ (2)Image 13: Growing at side of stream, with reflections - in situ (3)Image 14: Growing at side of stream, with reflections - in situ (4)Image 15: Growing at side of stream, with reflections - in situ (5)Image 16: Growing at side of stream, with reflections - in situ (6)Image 17: Plants growing in shallow water - in situ at side of streamImage 18: Stem nodes with branches - close-upImage 19: Stem nodes without branches - pale backgroundImage 20: Stem node with branches - close-upImage 21: Stem node without branches - close-upImage 22: Stem node without branches - close-up (2)Image 23: Stem node without branches - close-up (3)Image 24: Sterile fronds in shallow water - in situ at side of streamImage 25: Branch tip - close-up - enlargedImage 26: Stem TS - highly enlargedImage 27: Stem TS - highly enlarged - close-upImage 28: Spores - equatorial focus - magnifiedImage 29: Spores - equatorial focus - magnified (2)Image 30: Spores - equatorial focus - magnified (3)Image 31: Spores - equatorial focus - magnified (4)Image 32: Spores - equatorial focus - microscope low magnificationImage 33: Spores - microscope low magnificationImage 34: Spores - microscope low magnification (2)Image 35: Spores - microscope low magnification (3)Image 36: Spores - microscope low magnification (4)Image 37: Spores - surface focus - magnifiedImage 38: Spores - surface focus - magnified (2)Image 39: Spores - surface focus - magnified (3)Image 40: Spores - surface focus - magnified (4)Image 41: Spores - surface focus - microscope low magnificationImage 42: Spores - surface focus - microscope low magnification (2)Image 43: Spores - surface focus - microscope low magnification (3)Image 44: Spores - surface focus - microscope low magnification (4)
3: Equisetum fluviatile (Water Horsetail)
23 Jun 1968 OSGR: TQ11 50° 50’ N, 0° 20’ W Vice County: East Sussex (VC 14) England
Image 1: Fertile frond

Equisetum fluviatile (Water Horsetail) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Equisetum fluviatile (Water Horsetail)
BioInfoBioInfo (www.bioinfo.org.uk) has 27 host/parasite/foodplant and/or other relationships for Equisetum fluviatile (Water Horsetail)
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