The ferns are a group of vascular plants that reproduce via spores and have neither seeds nor flowers. They differ from mosses by being vascular, i.e., having specialized tissues that conduct water and nutrients, and in having life cycles in which the branched sporophyte is the dominant phase.
Equisetum is the only living genus in Equisetaceae, a family of vascular plants that reproduce by spores rather than seeds.
Ophioglossum vulgatum, commonly known as adder's-tongue, southern adder's-tongue or adder's-tongue fern, is a species of fern in the family Ophioglossaceae.
Equisetum fluviatile, the water horsetail or swamp horsetail, is a vascular plant in the horsetail family Equisetaceae. It is a perennial herbaceous pteridophyte that reproduces using spores.
Calamites is a genus of extinct arborescent (tree-like) horsetails to which the modern horsetails are closely related. Unlike their herbaceous modern cousins, these plants were medium-sized trees, growing to heights of 30–50 meters. They were components of the understories of coal swamps of the Carboniferous Period.
Equisetidae is one of the four subclasses of Polypodiopsida (ferns), a group of vascular plants with a fossil record going back to the Devonian. They are commonly known as horsetails. They typically grow in wet areas, with whorls of needle-like branches radiating at regular intervals from a single vertical stem.
Dryopteris expansa, the alpine buckler fern, northern buckler-fern or spreading wood fern, is a species of perennial fern native to cool temperate and subarctic regions of the Northern Hemisphere, south at high altitudes in mountains to Spain and Greece in southern Europe, to Japan in eastern Asia, and to central California in North America. It prefers cool, moist mixed or evergreen forests and rock crevices on alpine slopes, often growing on rotting logs and tree stumps and rocky slopes. It is characteristically riparian in nature, and is especially associated with stream banks.
Equisetum giganteum, with the common name southern giant horsetail, is a species of horsetail native to South America and Central America, from central Chile east to Brazil and north to southern Mexico.
Equisetum arvense, the field horsetail or common horsetail, is an herbaceous perennial plant in the Equisetidae (horsetails) sub-class, native throughout the arctic and temperate regions of the Northern Hemisphere. It has separate sterile non-reproductive and fertile spore-bearing stems growing from a perennial underground rhizomatous stem system. The fertile stems are produced in early spring and are non-photosynthetic, while the green sterile stems start to grow after the fertile stems have wilted and persist through the summer until the first autumn frosts. It is sometimes confused with mare's tail, Hippuris vulgaris.
Equisetum palustre, the marsh horsetail, is a perennial herbaceous pteridophyte belonging to the subclass of horsetails (Equisetidae). It is widespread in cooler regions of Eurasia and North America.
Equisetum pratense, commonly known as meadow horsetail, shade horsetail or shady horsetail, is a widespread horsetail (Equisetophyta) and it is a pteridophyte. Shade horsetail can be commonly found in forests with tall trees or very thick foliage that can provide shade and tends to grow closer and thicker around streams, ponds and rivers. The specific epithet pratense is Latin, meaning pasture or meadow dwelling.
Equisetum telmateia, the great horsetail, is a species of Equisetum (horsetail) native to Europe, western Asia and northwest Africa. It was formerly widely treated in a broader sense including a subspecies in western North America, but this is now treated as a separate species, Equisetum braunii.
Equisetum hyemale is an evergreen perennial herbaceous pteridophyte in the horsetail family Equisetaceae native to Eurasia and Greenland. It was formerly widely treated in a broader sense including a subspecies in North America, but this is now treated as a separate species, Equisetum praealtum.
Diphasiastrum complanatum, common names groundcedar, creeping jenny, or northern running-pine, is a species of clubmoss native to dry coniferous forests in colder northerly parts of the world. Under the original name Lycopodium complanatum, this was an inclusive superspecies that included a number of other species now known to be biologically separate. This plant is an evergreen, perennial pteridophyte. The spores are produced June to September.
Equisetum scirpoides Michx., Fl. Bor.-Amer. 2: 281 (1803). 2 n = 216.The smallest of the currently occurring representatives of the genus Equisetum (horsetail).
Diphasiastrum alpinum, the alpine clubmoss, is a species of clubmoss. This plant is a glaucous scale-leaved perennial pteridophyte. In Finland, the spores are produced June to September. It was first described by Carl Linnaeus in his Flora Lapponica, 1737, from specimens obtained in Finland.
Equisetum ramosissimumDesf., known as branched horsetail, is a species of evergreen horsetail.
Equisetum ramosissimum var. huegelii, with synonyms including Equisetum debile and Equisetum huegelii, is a variety of Equisetum ramosissimum, a plant in the family Equisetaceae, found in parts of tropical Asia and China.
Equisetum braunii, the northern giant horsetail, is a species of Equisetum (horsetail) native to western North America. It was formerly widely treated as a subspecies of the European species Equisetum telmateia, and still is by some authorities. It is often simply but ambiguously called "giant horsetail", but that name may just as well refer to the Latin American species Equisetum giganteum and Equisetum myriochaetum. The range extends from southeastern Alaska and western British Columbia south to California, mainly in coastal regions, but also inland to Idaho.
Equisetum praealtum, the scouringrush horsetail, is a species of Equisetum (horsetail) native to North America and northeastern Asia. It was formerly widely treated as a subspecies or variety of the European and west Asian species Equisetum hyemale, and still is by some authorities.
