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Phylum Sphenophyta -- sphenophytes or horsetails Stems of Equisetum contain deposits of silicon dioxide (glass) which render them unpalatable and strong. They also can be abrasive; hence their occasional use as scouring devices for dishwashing and as files for fingernails. Equisetum spores have curious arm-like structures called elaters, which twist and turn in response to humidity changes. These elaters are thought to help effect spore dispersal. Genus Equisetum |
Equisetum hyemale L. - Scouring Rush |
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Equisetum arvense L. - Field Horsetail |
Equisetum node, 10x |
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Equisetum strobilus, l.s., 10x |
Equisetum strobilus, c.s., 20x |
Equisetum strobilus, c.s., 10x |
Equisetum gametophyte, w.m., 20x |
Equisetum gametophytes are |
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