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Equisetum x ferrissii Clute
Family: Equisetaceae [Equisetum ferrissii Clute, moreEquisetum fluviatile var. siccum Lunell, Equisetum hyemale f. polystachyum A. A. Eat., Equisetum hyemale f. proliferum Haberer, Equisetum hyemale var. intermedium A. A. Eat., Equisetum hyemale var. suksdorfii A. A. Eat., Equisetum hyemale x Equisetum laevigatum , Equisetum intermedium (A. A. Eat.) Rydb., Equisetum kansanum f. elatum (Engelm.) M.Broun, Equisetum laevigatum var. elatum Engelm., Equisetum praealtum var. laevigatum (A. Br.) Bush, Hippochaete ferrissii (Clute) Holub, Hippochaete laevigata var. eatonii Farw., Hippochaete praealta var. suksdorfii (A. A. Eat.) Farw.]	Resources
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The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.

The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.