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Equisetum

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Equisetum

any pteridophyte plant of the genus Equisetum, comprising the horsetails. The plant is herbaceous, has rhizomes and a vertical stem with whorls of scale leaves, and is often found growing in water and damp conditions. It is the last living representative of the order Equisetales, members of which, during the time of the dinosaurs, grew as high as trees and were probably a major food source.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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References in periodicals archive
Arbuscular mycorrhizas and dark septate fungi in Lycopodium paniculatum (Lycopodiaceae) and Equisetum bogotense (Equisetaceae) in a Valdivian temperate forest of Patagonia, Argentina.
FERNS Equisetaceae Horsetail Family Equisetum telmateia Ehrh.
Apocynaceae 0.05 Bromus inermis Poaceae 0.005 Cakile endentula Brassicaceae 0.005 Calamovilfa longifolia Poaceae 0.35 Campanula rotundifolia Campanulaceae 0.02 Centaurea maculosa Asteraceae 0.02 Cirsium pitcheri Asteraceae 0.05 Elymus canadensis Poaceae 0.005 Equisetum hyemak Equisetaceae 0.01 Euphorbia corollata Euphorbiaceae 0.07 Juniperus horizontalis Cupressaceae 0.10 Liatris sp.
The plants selected for the study of the inhibitory effect on [alpha]-amylase activity are Equisetum arvense (Equisetaceae), Matricaria pubescens (Asteraceae), Oudneya africana (Brassicaceae), Salvia officinalis (Lamiaceae), Thapsia garganica (Ombellifereae), and Cistus whose type has not been determined.
These include Cyatheaceae (tree ferns), Equisetaceae (scouring rushes and horsetails), Hymenophyllaceae (ferns that grow as epiphytes on trees), and Selaginellaceae (forest floor ferns).
Finally, the family Equisetaceae consists of the living genus Equisetum as well as other extinct herbaceous sphenopsids resembling Equisetum.
Collection Species Site(s) Flora PHYLUM LYCOPODIOPHYTA SELAGINELLACEAE (Spike-Moss Family) Selaginella rupestris (L.) Spring X PHYLUM EQUISETOPHYTA EQUISETACEAE (Horsetail Family) Equisetum arvense L.
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