equisetum

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eq·ui·se·tum

 (ĕk′wə-sē′təm)
n. pl. eq·ui·se·tums or eq·ui·se·ta (-tə)

[Latin equisaetum, horsetail : equus, horse; see ekwo- in Indo-European roots + saeta, bristle, stiff hair.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

equisetum

(ˌɛkwɪˈsiːtəm)
n, pl -tums or -ta (-tə)
(Plants) any tracheophyte plant of the genus Equisetum, which comprises the horsetails
[C19: New Latin, changed from Latin equisaetum, from equus horse + saeta bristle]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

horse•tail

(ˈhɔrsˌteɪl)

n.
a nonflowering plant of the genus Equisetum, family Equisetaceae, with hollow jointed stems bearing scaly leaves and a spikelike cone bearing spores.
[1350–1400]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.equisetum - horsetailsEquisetum - horsetails; coextensive with the family Equisetaceae
fern genus - genera of ferns and fern allies
Equisetaceae, family Equisetaceae, horsetail family - sole surviving family of the Equisetales: fern allies
horsetail - perennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South America
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
All equiseta have pre-formed bud and root primordia at each node of both the aerial stems and underground rhizomes (Gifford & Foster, 1989).
This suggests that members of the subgenus Hippochaete, and hence the giant equiseta, may be less allelopathic than members of the subgenus Equisetum.
As for all equiseta, the giant horsetails spread vegetatively via extensive rhizome systems, often forming large clones.