Josef Holub

Lycopodiella inundata is a species of club moss known by the common names inundated club moss, marsh clubmoss and northern bog club moss. It has a circumpolar and circumboreal distribution, occurring throughout the northern Northern Hemisphere from the Arctic to montane temperate regions in Eurasia and North America. It grows in wet habitat, such as bogs, ponds, moist spots on the tundra, and long-standing borrow pits.

Diphasiastrum is a genus of clubmosses in the plant family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. It is closely related to the genus Lycopodium, and some botanists treat it within a broad view of that genus as a section, Lycopodium sect. Complanata. Some species superficially resemble diminutive gymnosperms and have been given common names such as ground-pine or ground-cedar. There are 16 species, and numerous natural hybrids in the genus; many of the hybrids are fertile, allowing their occurrence to

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.

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.

Fallopia dumetorum, also known as copse bindweed, is a species of flowering plant in the family Polygonaceae, native to temperate Eurasia.

Helminthotheca echioides, known as bristly (or prickly) oxtongue, is a sprawling annual or biennial herb native to Europe and North Africa. It was originally placed within the genus Picris but is often separated within the small genus Helminthotheca alongside a few other (mainly North African) plants which also have the distinctive outer row of bracts around the flowerheads. It is a ruderal plant, found on waste ground and agricultural soils around the world, and in some places it is considered a troublesome weed.

Lycopodiella is a genus in the clubmoss family Lycopodiaceae. The genus members are commonly called bog clubmosses, describing their wetland habitat. In the past, the genus was often incorporated within the related genus Lycopodium, but was segregated in 1964. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), Lycopodiella is placed in the subfamily Lycopodielloideae, along with three other genera. In this circumscription, the genus has about 15 species. Other sources use a wider circumscription, in which the genus is equivalent to the Lycopodielloideae of PPG I, in which

Anemonastrum narcissiflorum, the narcissus anemone or narcissus-flowered anemone, is a herbaceous perennial in the genus Anemonastrum and the buttercup family. Basionym: Anemone narcissiflora Hook. & Arn.

Diphasiastrum tristachyum, commonly known as blue clubmoss, blue ground-cedar, ground pine, deep-rooted running-pine or ground cedar, is a North American and Eurasian species of clubmoss. In North America, it has been found from Newfoundland west to Manitoba, and south as far as Georgia and Alabama. In Eurasia, it ranges from southern Norway and Sweden south to France and Italy and it also occurs in the Caucasus. The name tristachyum means three branched.

Botrypus virginianus, synonym Botrychium virginianum, sometimes called rattlesnake fern is a species of perennial fern in the adders-tongue family. It is monotypic within the genus Botrypus, meaning that it is the only species within the genus. It is called the rattlesnake fern in some parts of North America, due to its habit of growing in places where rattlesnakes are also found. Rattlesnake fern prefers to grow in rich, moist woods in dense shade and will not tolerate direct sunlight.

Fallopia baldschuanica (syn. Polygonum baldschuanicum) is an Asian species of flowering plant in the knotweed family known by several common names, including Russian-vine, Bukhara fleeceflower, Chinese fleecevine, mile-a-minute and silver lace vine. It is native to Asia (China, Russia, Kazakhstan, etc.), and is growing wild in parts of Europe and North and Central America as an introduced species. Some authors split the species in two, referring to the Chinese populations as Fallopia aubertii and the Russian and Central Asian species as F. baldschuanica. Fallopia baldschuanica is grown as an

Tephroseris integrifolia (vernacular name: field fleawort) is a species of flowering plant belonging to the family Asteraceae. Its native range is Europe to Siberia and Iran. Synonym: Senecio integrifolius (L.) Clairv. Subspecies: Tephroseris integrifolia subsp. maritima (Syme) B.Nord.

Persicaria mitis (Schrank) Assenov is a species of flowering plant in the family Polygonaceae, native to Europe. (Persicaria mitis Delarbre is a different species, being a rejected synonym of Persicaria maculosa.)

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Anemonoides trifolia (syn. Anemone trifolia), the three-leaved anemone, is a perennial herbaceous plant in the buttercup family (Ranunculaceae).

Phlegmariurus is a genus of lycophyte plants in the family Lycopodiaceae. The genus is recognized in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), but not by some other sources, which keep it in a broadly defined Huperzia.

Dactylorhiza russowii is a species of Dactylorhiza. It is native to the areas from East Germany to Central Russia.

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Diphasiastrum × issleri, known as Issler's clubmoss, is a hybrid species of clubmoss known from northern Europe and a few historical collections in northern Maine.

Stuckenia vaginata (syn. Potamogeton vaginatus), commonly called sheathed pondweed, big sheathed pondweed or large-sheathed pondweed is a water plant species that grows in fresh and brackish water in Europe, Northern Asia (excluding China) and North America. Sheathed pondweed is rare, but is not in the 2012 IUCN Red List. Stuckenia vaginata is a fully submerged aquatic plant and does not have any floating or emerged leaves. The flowers are wind pollinated and the seeds float. Tubers that are rich in starch are formed on the rhizomes. Reproduction can either be vegetative with tubers and plant

Pedersenia is a genus of flowering plants belonging to the family Amaranthaceae. Its native range is mainland tropical America, from Honduras to Paraguay, and Puerto Rico and the Windward Islands. The genus name of Pedersenia is in honour of Troels Myndel Pedersen (1916–2000), a Danish-born Argentinian botanist with a large herbarium and also specialist in Amaranthaceae. It was first described and published in Preslia Vol.70 on page 181 in 1998.

Oreopteris is a genus of ferns belonging to the family Thelypteridaceae. The species of this genus are found in Eurasia and North America. Species: Oreopteris elwesii (Baker ex Hook. & Baker) Holttum Oreopteris limbosperma (All.) Holub

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Diphasiastrum sitchense, the Sitka clubmoss, is a pteridophyte species native to northern North America and northeastern Asia. It is a terrestrial herb spreading by stolons running on the surface or the ground or just slightly below the surface. Leaves are appressed, broadly lanceolate, up to 3.2 mm (0.13 inches) long. Strobili are solitary on the ends of shoots. It is known from every province in Canada, plus the US States of Alaska, Oregon, Washington, Idaho, Montana, Maine, New Hampshire, Vermont, and New York. It is also found in Greenland, St. Pierre and Miquelon, Yukon, Japan, and the

Austrolycopodium is a genus of lycophytes in the family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. Some sources do not recognize the genus, sinking it into Lycopodium. Austrolycopodium species are mostly native to the temperate southern hemisphere.

Pseudolycopodiella caroliniana, known as slender bog club-moss, is a species of lycophyte in the family Lycopodiaceae. The genus Pseudolycopodiella is accepted in the Flora of North America and the Pteridophyte Phylogeny Group classification of 2016 (PPG I), but not in other classifications, which submerge the genus in Lycopodiella. The species has a discontinuous distribution, being native to the eastern United States (Alabama, Arkansas, Delaware, Florida, Georgia, Louisiana, Maryland, Massachusetts, Mississippi, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, Texas and

Pseudolycopodiella is a genus of non-seed plants in the Lycopodiaceae, long considered part of Lycopodium, but now recognized as a separate genus. It has 10–14 recognized species, only one in North America: Pseudolycopodiella caroliniana.

Phlegmariurus phlegmaria, synonym Huperzia phlegmaria, commonly known as either coarse tassel fern or common tassel fern, is an epiphytic species native to rainforests in Madagascar, some islands in the Indian Ocean, Asia, Australasia and many Pacific Islands. Phlegmariurus phlegmaria is commonly found in moist forests and rainforests at high altitudes, in and amongst mosses and other epiphytes. Members of the order Lycopodiales are commonly referred to as clubmosses.

Fallopia scandens, the climbing false buckwheat, is a species of Fallopia native to North America. It is a herbaceous perennial plant which grows from to 1–5 m (3–16 ft) tall. Although they are semi-erect during bloom, when they are producing fruit, they hang from their pedicels in a downward position. Both the fruit and flower are greenish-white in appearance. In North America, it is often misidentified with Fallopia dumetorum, a species endemic to Europe.