Plants with jointed stems, with distinct nodes. Leaves small, whorled, fused into sheaths; tips remaining free, toothlike. Sporangia borne on peltate sporophylls aggregated in cones 0.3–10 cm. Spores green (except white in hybrids), all 1 kind. Gametophytes green, terrestrial, unisexual; male gametophytes smaller than female.

Distribution

Nearly worldwide.

Discussion

Genus 1, species 15 (11 species in the flora).

Selected References

None.

Lower Taxa

Equisetum

Illustrations

	Family ⠉	Taxon	Illustrator ⠉
	Equisetaceae Equisetaceae Equisetaceae	Equisetum scirpoides Equisetum hyemale subsp. affine Equisetum arvense	Laurie Klingensmith Laurie Klingensmith Laurie Klingensmith
	Equisetaceae Equisetaceae	Equisetum subg. Hippochaete Equisetum subg. Equisetum	Laurie Klingensmith Laurie Klingensmith