Equisetaceae |
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Equisetum arvense L. |
Equisetum arvense L |
Equisetum L. |
E. arvense L., Sp. PI. 1061 (1753). Ic.: Fl. Dan. 11: t. 1942 (1829). Roles, S. J., British Flora Illustrations 1, t. 19 (1957). Stems of 2 types, the fertile, non-green stems produced before the green sterile stems. Sterile stems 20-80 cm, green, branched, slightly rough, with 6-19 deep grooves. Sheaths green, teeth as many as grooves, 1-ribbed, acute, with blackish tips. Central hollow somewhat less than 1/2 the stem diameter. Branches spreading, 3-4 grooved, the lowest internode longer than the stem sheath. Fertile stems up to 25 cm, simple, brownish, with 4-6 distant leaf-sheaths. Cone 1-4 cm. Waste places, stream sides, etc., up to 1700 m. Described from Europe. Scattered, but not recorded from W. & S. Anatolia. A2(E) Istanbul: Cendere to Kağithane, Azn.! A2(A) Istanbul: Anadolu Hissar, Azn.! Bursa: Ulu Da., For-manek. A4 Kastamonu: Ilgaz Da., 1700 m, D. 25042! A8 Rize: Cimil, Ball B4 Ankara: Ankara, Krause. B7 Adiyaman: between Kahta and Malatya, 1600 m. Hand-Mazz. 2464. B9 Van: Değirmenköy, W of Van, Tchitoııny 137A. Europe, N. Temperate Asia and N. America. The Turkish distribution of this species is uncertain; it is probably more common than the above records indicate. |