Biology
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The ancestry of clubmosses can be traced back to at least the Carboniferous period, 300 million years ago. Most of the land on the planet was then composed of one huge super-continent called Pangea. A large part formed an extensive area of wetland, populated by the giant clubmosses. These tree-like plants grew to over 35 metres tall extremely quickly, at a rate of several metres a year. It is believed that they only reproduced once, at their maximum height and size, before dying and sinking back into the wet ground. Conditions at the time favoured the formation of vast peatlands and, over the vast periods of geological time, these peats were compressed and formed the extensive coalfields now found over much of the Earth's surface.
The spores of clubmoss are highly inflammable, and have been put to a number of different uses over the centuries. Known as 'Lycopodium powder', they have been used as a dusting powder for infants' sores, in treatment for irritation and spasm of the bladder, and used in pyrotechny in the making of fireworks, and for artificial lightning on the stage. Another use has been dyeing woollen cloth, and as the lubricant on condoms.
Conservation
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Marsh clubmoss is listed in the UK Biodiversity Action Plan (UK BAP), and included in English Nature's Species Recovery Programme. In order to return this species to its former range, a number of re-introduction projects have taken place. In one case, the turves containing the clubmoss specimens were sent by post in a biscuit tin. All of these re-introduced plants have shown some signs of initial success, but over the long-term, they do not seem to be surviving. The reasons for this are not clear at present but the sites are being monitored in order to discover the source of the problem. Conversely, where plants have been introduced to new sites where there is proper management, they seem to have survived much better. However, in the case of the Norfolk site, it is well managed but still the plant does not seem to be responding.
Description
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Clubmosses are simple plants, related to ferns; their common name is an indication of their resemblance to true mosses, the 'club' referring to the shape of the spore-bearing cones that most produce. Marsh clubmoss is the only British member of its particular genus. In appearance, it resembles another clubmoss, Lycopodium clavatum or stag's-horn clubmoss, not uncommon in the uplands.
Like ferns, clubmosses have two distinct forms; the 'gametophyte', which stays underground and grows in partnership with a fungus, and the form in which most people are likely to see, the 'sporophyte'. This consists of long trailing and rooting stems, which are covered with a coat of tiny leaf-like scales called microphylls with tiny, pale brown spore cases at the tips.
Habitat
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Marsh clubmoss grows on wet heaths, peaty soil, and other places that are wet for much of the winter, preferably with some disturbance from grazing, peat cutting or where vehicles or cattle have broken up the surface.
Range
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In the UK, this species is mainly found the New Forest, Dorset and Surrey, and in the Republic of Ireland. It is also found in Wales and Scotland. There are a scattering of other sites in Cornwall, Devon, West Sussex and East Sussex. Attempts have been made to re-introduce it to Norfolk in 1999. Its global range includes Europe, where is known to be in decline, North America and Asia.
Status
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Classified as Nationally Scarce in the UK.
Threats
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Marsh clubmoss was once much more widely spread and was once described as 'common'. Since 1855, loss of habitat by drainage has caused a major decline in its populations. Today, it is principally threatened by neglect and scrub encroachment arising as a result of the decline of sustainable peat-cutting, under-grazing and, possibly, pollution.
Description
provided by eFloras
Horizontal stems flat on ground, 3--12 X 0.5--0.9 cm; stems (excluding leaves) slender, 0.5--0.9 mm diam.; leaves monomorphic, spreading, upcurved, 5--6 X 0.5--0.7 mm, margins entire. Peduncles 1(--2) per plant, 3.5--6 X 0.4--0.7 cm; strobilus length 1/2--1/3 total height; leaves spreading, 5--6 X 0.5--0.8 mm, margins rarely toothed. Strobili 10--20 X 2.5--5.5 mm. Sporophylls spreading to spreading-ascending, 4.5--5 X 0.5--0.9 mm, margins rarely toothed. 2 n = 156.
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Distribution
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St. Pierre and Miquelon; Alta., B.C., N.B., Nfld., N.S., Ont., P.E.I., Sask., Que.; Alaska, Calif., Conn., Idaho, Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., Mont., N.H., N.J., N.Y., Ohio, Oreg., Pa., R.I., Vt., Va., Wash., W.Va., Wis.; Eurasia.
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Habitat
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Bogs, lakeshores, marshes, lichens, borrow pits; 0--2000m.
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Synonym
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Lycopodium inundatum Linnaeus, Sp. Pl. 2: 1102. 1753
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Lycopodiella inundata
provided by wikipedia EN
Lycopodiella inundata is a species of club moss known by the common names inundated club moss,[2] marsh clubmoss[3] 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.
Description
It is a small plant forming patches on the ground, its leafy sterile stems branching and lying horizontal along the ground, rooting at intervals. The sporing cone-bearing stems stand erect in July and August, a few centimeters tall. The leaves are curving, green, narrow, and sharply pointed, measuring a few millimeters long.[4]
Distribution and habitat
This club moss is an arctic-alpine species with a circumpolar boreal and montane distribution in the Northern Hemisphere. It mostly occurs in Europe, but is also present in East Asia and North America. In the British Isles it is classified as a UK Priority Species as it is rare and seems to be on the decline. It occurs in Scotland and the western fringes of England and Wales, and at scattered locations elsewhere. Nevertheless, it can increase rapidly when the conditions are right, as happened at Llyn Cwm-y-ffynnon in Wales on bare peat substrates uncolonised by other plants because of winter inundation, cattle poaching and peat cutting.[5] It occurs at a few locations across Ireland and at one single location in Northern Ireland, at Peatlands Park in County Armagh, and because of its rarity, it is listed as a Northern Ireland Priority Species.[4]
References
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Lycopodiella inundata: Brief Summary
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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.
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