Equisetum telmateia Ehrh.
(Great Horsetail)

Taxonomic hierarchy:
SpeciesEquisetum telmateia (Great 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 telmateia (Great Horsetail) :
1: Equisetum telmateia (Great Horsetail)
8 Apr 2016 OSGR: SZ07 50° 40’ N, 1° 60’ W Vice County: Dorset (VC 9) England
Sporophytes all over a small vegetable garden
Image 1: Invading vegetable gardenImage 2: Invading vegetable garden (2)Image 3: SporophytesImage 4: Sporophytes (2)Image 5: Sporophytes (3)Image 6: Sporophytes - close-up
2: Equisetum telmateia (Great Horsetail)
23 Apr 2013 OSGR: SY77 50° 30’ N, 2° 30’ W Vice County: Dorset (VC 9) England
Sporophytes
Image 1: SporophytesImage 2: Sporophytes (2)Image 3: Sporophytes (3)Image 4: Sporophytes (4)Image 5: Spores and elaters - dry - magnifiedImage 6: Spores and elaters - magnifiedImage 7: Spores and elaters - magnified (2)Image 8: Spores and elaters - magnified (3)Image 9: Spores and elaters - magnified (4)Image 10: Spores and elaters - microscope low magnification
3: Equisetum telmateia (Great Horsetail)
28 Jun 2010 OSGR: SY67 50° 30’ N, 2° 30’ W Vice County: Dorset (VC 9) England
Image 1: Plant - in situImage 2: Plant - in situ - close-up
4: Equisetum telmateia (Great Horsetail)
13 May 2008 OSGR: SK28 53° 20’ N, 1° 30’ W Vice County: South-west Yorks (VC 63) England
Vegetative stems
Image 1: Sterile stems - youngImage 2: Sterile stems - young (2)Image 3: Sterile stems - young - close-up
5: Equisetum telmateia (Great Horsetail)
22 Apr 2006 OSGR: SY59 50° 50’ N, 2° 40’ W Vice County: Dorset (VC 9) England
fertile stems, growing at roadside . Photos: Fertile plant: in situ, strobilus close-up, nail varnish peels of stem and sheath surfaces
Image 1: Fertile stem - close-upImage 2: Fertile stem - in situImage 3: Strobilus - close-up - enlargedImage 4: Sheath - magnifiedImage 5: Sheath - microscope low magnificationImage 6: Sheath - surface structure - microscope low magnificationImage 7: Spores and elaters - microscope low magnificationImage 8: Spores and elaters - microscope low magnification (2)Image 9: Spores - microscope low magnificationImage 10: Spores - microscope low magnification (2)Image 11: Stem surface - microscope low magnification
6: Equisetum telmateia (Great Horsetail)
9 Apr 2005 OSGR: SY59 50° 50’ N, 2° 40’ W Vice County: Dorset (VC 9) England
Image 1: Effete sporophytes - in situ
7: Equisetum telmateia (Great Horsetail)
14 May 2000 OSGR: SU56 51° 20’ N, 1° 20’ W Vice County: Berks (VC 22) England
Image 1: Sterile frondsImage 2: Sterile frond - sheath - close-upImage 3: Sterile frond - young - tip
8: Equisetum telmateia (Great Horsetail)
12 Mar 2000 OSGR: SY29 50° 40’ N, 3° 0’ W Vice County: South Devon (VC 3) England
Image 1: ConeImage 2: Sporophytes
9: Equisetum telmateia (Great Horsetail)
2 Apr 1999 OSGR: SU56 51° 20’ N, 1° 20’ W Vice County: Berks (VC 22) England
16 fertile stems this year
Image 1: Cone - close-upImage 2: Cone - close-up showing sporangiaImage 3: Fertile stemImage 4: Fertile stem - cross-sectionImage 5: Fertile stem - lower nodesImage 6: Fertile stem - top nodeImage 7: ElaterImage 8: Elater (2)Image 9: SporesImage 10: Spores and elatersImage 11: Spores and elaters (2)
10: Equisetum telmateia (Great Horsetail)
19 Jul 1981 OSGR: SU18 51° 30’ N, 1° 50’ W Vice County: North Wilts (VC 7) England

Reared

specimen with a few branches

Image 1: Plantlet growing from prothallus
11: Equisetum telmateia (Great Horsetail)
14 Jul 1981 OSGR: SU18 51° 30’ N, 1° 50’ W Vice County: North Wilts (VC 7) England

Reared

specimen with a few branches

Image 1: Plantlet growing from prothallusImage 2: Plantlet growing from prothallus (2)Image 3: Plantlets growing from prothalli
12: Equisetum telmateia (Great Horsetail)
11 Apr 1972 OSGR: TQ21 50° 50’ N, 0° 10’ W Vice County: East Sussex (VC 14) England

specimen with a few branches

Image 1: Fertile fronds
13: Equisetum telmateia (Great Horsetail)
31 May 1971 OSGR: TQ21 50° 50’ N, 0° 10’ W Vice County: East Sussex (VC 14) England

specimen with a few branches

Image 1: Sterile fronds - side viewImage 2: Sterile fronds - top view

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

NBNNBN (data.nbn.org.uk) has a distribution map for Equisetum telmateia (Great Horsetail)
BioInfoBioInfo (www.bioinfo.org.uk) has 1 host/parasite/foodplant and/or other relationships for Equisetum telmateia (Great Horsetail)
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