1-5 Equisetaceae, horsetail family
Another ancient family of plants, there is but a single extant genus. Annual or perennial, all have jointed hollow stems, marked by ridges. Coarse texture is further enhanced by the presence of silica crystals in the epidermis. Leaves are reduced to scales forming whorls, which may or may not be photosynthetic. Branches when present are also in whorls. Sporangia are arranged on whorled stalks forming a terminal cone. Plants reproduce by spores and creeping rhizomes. Sterile hybrids produced with some species. Photographs by Roger Lloyd, Jamie Ellison, Ross Hall and Sean Blaney
Pteridophyte, native ferns, horsetail family, scouring rush, Equisetum, horsetail, fern allies
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