Giant Horsetail (6220)

In a downtown excavation in Seattle, it was reported that Giant Horsetail roots extended vertically almost 20 feet.  This, the tallest of our local horsetails, is a monster to eradicate!  The rhizomes are not affected much by losing their topside.  They can quickly resprout and grow again.

http://naeb.brit.org/uses/search/?string=Equisetum+arvense
https://en.wikipedia.org/wiki/Equisetum
https://burkeherbarium.org/imagecollection/browse.php?Genus=Equisetum
http://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Equisetum telmateia
https://plants.usda.gov/core/profile?symbol=EQTE
https://en.wikipedia.org/wiki/Equisetum_telmateia
http://www.burkemuseum.org/research-and-collections/botany-and-herbarium/collections/database/results.php?Genus=Equisetum&Species=telmateia&SourcePage=search.php&IncludeSynonyms=Y&SortBy=DESC&SortOrder=Year

Of the horsetails in the Gardens and here on the north Pacific Rim, in terms of height the Giant Horsetail is the:

smallest
mid-size
tallest

Comments, content, questions appreciated; email bb@plc215.org

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