Lycopodiella inundata

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.

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.

Lycopodiella inundata (L.) Holub:
Canada (North America)
United States (North America)
Russian Federation (Asia)
Japan (Asia)
China (Asia)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Lycopodium inundatum L.:
Canada (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

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.

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Global Range: Europe, northeastern North America, and spotty distribution in northwestern North America.

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.

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.

Lycopodium inundatum Linnaeus, Sp. Pl. 2: 1102. 1753

L. ANNOTINUM is similar, but the sporophylls are half the length of the vegetative leaves. L. CLAVATUM has well-differentiated cones of sporophylls, and L. SELAGO has bands of sporophylls that alternate with vegetative leaves. L. INUNDATUM is the only species occurring in standing water of peatlands.

Bogs, lakeshores, marshes, lichens, borrow pits; 0--2000m.

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.

The following is a representative barcode sequence, the centroid of all available sequences for this species.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 9
Species With Barcodes: 1

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G5 - Secure

Reasons: Patchy distribution through North America, sometimes common, with tens of thousands of occurrences.

Classified as Nationally Scarce in the UK.

Comments: Land-use conversion, habitat fragmentation, wetland drainage, and succession are considered low-level threats (Southern Appalachian Species Viability Project 2002).

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.

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.