International Botany Project

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.

2 IEA & WEP Botanical Report

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.

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.

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Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017

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Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017

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Equisetum hyemale subsp. hyemale Linnaeus, Sp. Pl. 2: 1062. 1753 Nature Reserve „Przełom Hołubli”, Subcarpathian Voivodeship, Poland, 25. 12. 2017 – Research Samples

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- 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