Equisetophyta

• Absolute Astronomy: Horsetail  - Discusses molecular data, species, hybrids, geographic links, and definitions.
• BioLib: Gallery Equisetophyta  - Shows images of members of this plant group.
• Equisetaceae  - Describes this group of homosporous vascular plants comprising a single genus with about 15 species. With images and links.
• Equisetophyta Life Cycle Stages  - Shows the growth cycle of this plant group. Includes text and diagram.
• Flora of Southwest Virginia: Phylum Sphenophyta  - Provides information on this spore-bearing group of vascular plants that are also called Equisetophyta.
• Giant Horsetails  - Contains information regarding this species including common names in Brazil, Bolivia and Ecuador. With links and images.
• Horsetail  - Describes the characteristics of this plant division. Includes scientific classification and species.
• Horsetail Family  - Describes this species of plants with jointed stems and distinctive nodes. With image and links.
• Horsetails  - Presents a brief description of this plant group, including descriptions of several Equisetum species.
• ITIS Report: Equisetophyta  - Report covers the taxonomy and nomenclature of member species.
• MavicaNET: Horsetails (Equisetophyta)  - Links to taxonomic and related categories, as well as online resources.
• Phylum Spenophyta: Horsetails or Scouring Rushes  - Details the California elements of this phylum. With images.
• Phylum Sphenophyta (Horsetails)  - Provides a brief description of this plant species. With links to collection of Equisetum images.
• Robert W. Freckmann Herbarium: Equisetophyta  - Presents the characteristics and size and distribution of Phylum Equisetophyta. With images.
• Robert W. Freckmann Herbarium: Keys to the species of Equisetum in the Upper Midwest  - Lists characteristics of this plant species in the area. With links to pictures and description.