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Equisetum telmateia

(Giant Horsetail)

Overview

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Interesting Facts

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Common Names

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Common Names in English:

Giant Horsetail, Giant Horsetail Equisetum Telmateia

Description

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Family Equisetaceae

Plants with jointed stems, with distinct nodes. Leaves small, whorled , fused into sheaths ; tips remaining free , toothlike. Sporangia borne on peltate sporophylls aggregated in cones 0.3--10 cm. Spores green (except white in hybrids), all 1 kind. Gametophytes green, terrestrial , unisexual ; male gametophytes smaller than female.

Genus 1, species 15 (11 species in the flora ) : nearly worldwide.[1]

Genus Equisetum

Plants perennial , rhizomatous . Aerial stems annual or perennial. Stems with hollow center and series of small carinal (under the ridges ) and larger vallecular (under the valleys) canals. Leaves in whorls, fused part of length into sheaths . Stem ridges traversing length of internode and continuing into sheaths, terminating in sheath teeth. Branches when present borne at nodes, erupting through base of subtending sheath. Cones terminal on green stems or, in some species, terminating special, reproductive, brown stems, composed of whorls of peltate sporophylls; cone apices rounded or sharply pointed ; sporangia 5--10 per sporophyll, pendent, attached to inner surface of sporophylls, elongate , dehiscing longitudinally. x =108.

Species 15: nearly worldwide.

Equisetum occurs in moist places such as riverbanks, lakeshores, roadsides, ditches, seepage areas, meadows, marshes, and wet woodlands. Aerial stems of Equisetum vary considerably in habit and appearance , even on individual plants, because of environmentally induced modifications affecting height and branching. Many taxonomically trivial varieties and forms have been named. For an extended discussion of this, see R.L. Hauke (1966). [2]

Physical Description

Habit: Forb/herb

Flowers: Bloom Period: n/a • Flower Color: inconspicuous, none

Size/Age/Growth

Size: 12-18" tall.

Habitat

Typically found at an altitude of 0 to 1,426 meters (0 to 4,678 feet).[3]

Biology

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Reproduction

Duration: Perennial

Growth

Sunlight: Sun Exposure: Full Sun .

Temperature: Cold Hardiness: 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b. (map)

Taxonomy

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Notes

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Equisetum

ZipcodeZoo has pages for 37 species, subspecies, varieties, forms, and cultivars in this genus:

E. arvense (Field Horsetail) · E. arvense f. nanum (Field Horsetail) · E. arvense f. nemorosum (Field Horsetail) · E. arvense var. ramulosum (Field Horsetail) · E. dycei (Horsetail) · E. ferrissii (Ferris Horsetail) · E. fluviatile (Water Horsetail) · E. giganteum (Giant Horsetail) · E. hyemale (Common Scouring Rush) · E. hyemale affine (Scouring Rush Horsetail) · E. hyemale f. herbaceum (Common Scouring-Rush) · E. hyemale var. affine (Scouringrush Horsetail) · E. laevigatum (Horsetail) · E. litorale (Litoral Horsetail) · E. mackaii (Mackai's Horsetail) · E. myriochaetum (Cola De Caballo Grande) · E. nelsonii (Nelson's Horsetail) · E. palustre (Marsh Horsetail) · E. pratense (Meadow Horsetail) · E. ramosissimum (Branched Horsetail) · E. scirpoides (Dwarf Horsetail) · E. scirpoides var. striatum (Dwarf Horsetail) · E. sylvaticum (Wood Horsetail) · E. telmateia (Giant Horsetail) · E. telmateia braunii (Giant Horsetail) · E. telmateia Ehrh. var. telmateia Ehrh. (Giant Horsetail) · E. telmateia var. braunii (Giant Horsetail) · E. umbrosum (Northern Pipefish) · E. variegatum (Variegated Horsetail) · E. variegatum alaskanum (Alaskan Scouringrush) · E. variegatum var. alaskanum (Alaskan Scouringrush) · E. variegatum var. variegatum (Variegated Scouring-Rush) · E. variegatum var. variegatum Schleich. ex F.Weber & D.M.H.Mohr (Variegated Scouring-Rush) · E. × dycei (Horsetail) · E. x ferrissii (Ferriss Horsetail) · E. x mackaii (Mackai's Horsetail) · E. x nelsonii (Nelson's Horsetail)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 11, 2007:

Identifiers

Footnotes

  1. Richard L.Hauke "Equisetaceae". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  2. Richard L. Hauke "Equisetum". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  3. Mean = 117.980 meters (387.073 feet), Standard Deviation = 163.180 based on 8,016 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 2012-05-01