Günther's Site - Photos of European Plants


Horsetail Hybrid Clans


Within the Horsetail Family there are two groups, within those the species are closer related and are hybridizing within the group. To the group around the Rough Horsetail Equisetum hyemale the Branched Horsetail Equisetum ramosissimum and the Variegated Horsetail Equisetum variegatum are belonging. The hybrids, which are possible between the three parent species mentioned above, are the following:
Equisetum hyemale / Rough Horsetail, Dutch Rush Equisetaceae / Horsetail Fam.	Equisetum x moorei / Moore's Horsetail = Equisetum hyemale x ramosissimum Equisetaceae / Horsetail Fam.	Equisetum ramosissimum / Branched Horsetail Equisetaceae / Horsetail Fam.
Equisetum hyemale subsp. affine / Scouring-Rush Horsetail Equisetaceae / Horsetail Fam. from East Asia, here used as ornamental plant	Equisetum x moorei nothosubsp. nipponicum / Moore's Horsetail = Equisetum hyemale subsp. affine x ramosissimum Equisetaceae / Horsetail Fam.	Equisetum ramosissimum / Branched Horsetail Equisetaceae / Horsetail Fam.
Equisetum hyemale / Rough Horsetail, Dutch Rush Equisetaceae / Horsetail Fam.	Equisetum x trachyodon / Mackay's Horsetail = Equisetum hyemale x variegatum Equisetaceae / Horsetail Fam.	Equisetum variegatum / Variegated Horsetail Equisetaceae / Horsetail Fam.
Equisetum ramosissimum / Branched Horsetail Equisetaceae / Horsetail Fam.	Equisetum x meridionale / Hybrid Horsetail = Equisetum ramosissimum x variegatum Equisetaceae / Horsetail Fam.	Equisetum variegatum / Variegated Horsetail Equisetaceae / Horsetail Fam.
Horsetail Hybrid Clans are usually fertile, therefore sites are not rare where a hybrid clans occurs abundantly, but without one or both of the parent species. In the Rhine Valley some ten kilometers around Karlsruhe there is a cumulation of hybrid clans of the Rough Horsetail. Beside the hybrid clans mentioned above there are also some triple hybrids, of which an origin as hybridization between the Rough Horsetail Equisetum hyemale and each one of the hybrid clans mentioned above is assumed.
Equisetum hyemale / Rough Horsetail, Dutch Rush Equisetaceae / Horsetail Fam.	Equisetum x ascendens / Ascending Horsetail = Equisetum hyemale x x moorei Equisetaceae / Horsetail Fam.	Equisetum x moorei / Moore's Horsetail = Equisetum hyemale x ramosissimum Equisetaceae / Horsetail Fam.
Equisetum hyemale / Rough Horsetail, Dutch Rush Equisetaceae / Horsetail Fam.	Equisetum x alsaticum / Alsatian Horsetail = Equisetum hyemale x x trachyodon Equisetaceae / Horsetail Fam.	Equisetum x trachyodon / Mackay's Horsetail = Equisetum hyemale x variegatum Equisetaceae / Horsetail Fam.
Equisetum hyemale / Rough Horsetail, Dutch Rush Equisetaceae / Horsetail Fam.	Equisetum x geissertii / Geissert's Horsetail = Equisetum hyemale x x meridionale Equisetaceae / Horsetail Fam.	Equisetum x meridionale / Hybrid Horsetail = Equisetum ramosissimum x variegatum Equisetaceae / Horsetail Fam.
To the second group around the Field Horsetail Equisetum arvense the Water Horsetail Equisetum fluviatile is belonging, as well as the Marsh Horsetail Equisetum palustre the Shady Horsetail Equisetum pratense the Wood Horsetail Equisetum sylvaticum and the Great Horsetail Equisetum telmateia Of this group I know currently only few hybrids.
Equisetum arvense / Field Horsetail Equisetaceae / Horsetail Fam.	Equisetum x litorale / Hybrid Horsetail = Equisetum arvense x fluviatile Equisetaceae / Horsetail Fam.	Equisetum fluviatile / Water Horsetail Equisetaceae / Horsetail Fam.
Equisetum fluviatile / Water Horsetail Equisetaceae / Horsetail Fam.	Equisetum x dycei / Dyce's Hybrid Horsetail = Equisetum fluviatile x palustre Equisetaceae / Horsetail Fam.	Equisetum palustre / Marsh Horsetail Equisetaceae / Horsetail Fam.
Hybrids in which the three following species are involved I have not seen yet.
Equisetum pratense / Shady Horsetail Equisetaceae / Horsetail Fam.	Equisetum sylvaticum / Wood Horsetail Equisetaceae / Horsetail Fam.	Equisetum telmateia / Great Horsetail Equisetaceae / Horsetail Fam.
Naturally this list of Horsetail Hybrid Clans isn't complete. It will be continued on occasion.