| | The Lycopodiales of Britain and Ireland (Diphasiastrum, Huperzia, Isoetes, Lycopodium, Selaginella) |
“Interrrupted Clubmoss”.
Morphology. Stems elongated, with numerous small leaves; creeping, and rooting directly at intervals along their length; 30–60 cm long; ostensibly monopodial vegetatively; with non-flattened branches; without secondary thickening. Leaves eligulate; not 4-ranked; 4–6 mm long; spreading; not hair-pointed.
Homosporous. Sporophylls differing markedly from the foliage leaves; aggregated into well defined terminal cones. Cones solitary, sessile at the tips of the normal shoots. The sporangia basal and subsessile on the adaxial surfaces of the sporophylls, non-septate.
Ecology and distribution. Upland and montane; moors on mountains, ascending to about 900 m. Local in England and Scotland, extinct in Wales and absent from Ireland(?).
Classification. Family Lycopodiaceae.
Ilustrations. • L. annotinum (Sowerby and Johnson, 1859). • British Lycopods: Sowerby and Johnson (1863). 1765, Diphasiastrum (Lycopodium) clavatum; 1766, Lycopodium annotinum; 1767, Diphasiastrum (Lycopodium) alpinum; 1768, Huperzia (Lycopodium) selago; 1769, Lycopodiella (Lycopodium) inundata; 1770, Selaginella selaginoides. From Sowerby and Johnson (1863).
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2007 onwards. The Lycopodiales of Britain and Ireland (Diphasiastrum, Huperzia, Isoetes, Lycopodium, Selaginella). Version: 5th August 2019. delta-intkey.com’.
