International Research Botany Group - 2018 - International Botany Project IEA PAPER - Recycled paper – Botanical Report - International Equisetological Association Original Paper 2018 Equisetaceae – Ancient family of plants, there is but a single extant genus. All have jointed hollow stems, marked by ridges. Coarse texture is further enhanced by the presence of silica crystals in the epidermis. Leaves are reduced to scales forming whorls, which may or may not be photosynthetic. Branches when present are also in whorls. Sporangia are arranged on whorled stalks forming a terminal cone. Plants reproduce by spores and creeping rhizomes. Sterile hybrids produced with some species. © World Equisetum Program Botanical Report © International Equisetological Association [email protected] 2 IEA & WEP Botanical Report © International Equisetological Association © World Equisetum Program Contact: [email protected] [ title: iea paper ] 3 Equisetum hyemale subsp. hyemale L. Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017 Radosław Janusz Walkowiak The INTERNATIONAL EQUISETOLOGICAL ASSOCIATION And WORLD EQUISETUM PROGRAM – RESEARCH SERVICE Editor : Beth Zawada Special thanks to Jacek Janusz Walkowiak [email protected] / [email protected] [ title : walkowiak or zawada ] Keywords : Equisetum hyemale, Equisetum, Horsetail, Equisetology, Plant Taxonomy - short notes : Equisetum hyemale L., Subspecies – 2 – / rough horsetail, scouring rush, scouringrush horsetail / Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Equisetum hyemale is a perennial plant. Is a spreading, reed-like perennial to 3 ft (0.9 m) tall. The evergreen stems are cylindrical, about 1/3 in (0.8 cm) in diameter, jointed, hollow, usually unbranched, and have rough longitudinal ridges. The tiny leaves are joined together around the stem, forming a narrow black-green band or sheath at each joint. Like other Pteridophytes (ferns and their relatives), does not produce flowers or seeds. It is a native plant throughout the Holarctic Kingdom, found in North America, Europe, and northern Asia. The plant is an invasive species of moist natural habitats in South Africa and Australia. Ecology : Streams, moist, sandy or gravelly areas. Medicinal plant, ornamental plant. 4 Equisetum hyemale subsp. affine (Engelmann) Calder & Roy L. Taylor, Canad. J. Bot. 43: 1387. 1965. Endemic to North America. 60–210 cm. Medicinal plant, ornamental plant. 5 6 7 Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017 8 9 Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017 10 11 12 13 14 15 16 17 18 19 Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017 – Research Samples 20 21 22 23 24 25 26 27 - short notes - Husby Ch. E., Walkowiak R. J., An Introduction to the Genus Equisetum ( Horsetail ). IEA Paper 2012 Walkowiak R. J., Equisetum Taxonomy, IEA Paper 2008, Version of 2008-10-04, Retrieved 2011-11-07 Walkowiak R. J., A Taxonomic Study of the Genus Equisetum ( Horsetail ). IEA Paper 2011 Hauke R. L., 1990. Equisetaceae. In: Kramer, K.U., Green, P.S. (Eds.), The Families and Genera of Vascular Plants. Pteridophytes and Gymnosperms. Springer-Verlag, Berlin, pp. 46–48 Hauke R. L., 1993. Equisetaceae Michaux ex De Candolle. In: Argus, G.W., et al. (Eds.), Flora of North America, Volume 2. Pteridophytes and Gymnosperms. Oxford University Press, Oxford, pp. 64–75 Hauke R. L., 1963. A taxonomic monograph of the genus Equisetum subgenus Hippochaete. Beihefte zur Nova Hedwigia 8: 1–123 Hauke R. L., 1961. A resume of the taxonomic reorganization of Equisetum subgenus Hippochaete, I. American Fern Journal 51(3):131-137 Hauke R. L., 1962. A resume of the taxonomic reorganization of Equisetum subgenus Hippochaete, II. American Fern Journal 52(1):29-35 Hauke R. L., 1962. A resume of the taxonomic reorganization of Equisetum subgenus Hippochaete, IV. American Fern Journal 52(1)123-130 © IEA 2018 28 © World Equisetum Program © International Equisetological Association 29 .