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FOC | Family List | FOC Vol. 2-3 | Equisetaceae | Equisetum

9. Equisetum variegatum Schleicher ex F. Weber & D. Mohr, Bot. Taschenbuch. 60, 447. 1807.

斑纹木贼 ban wen mu zei

Plants small to medium-sized. Rhizome erect and creeping, blackish brown, nodes and roots with long yellowish brown trichomes. Aerial stem perennial, monomorphic, green, 10-20 cm tall, 1-1.5 mm in diam. at middle, not branched; internodes 1.5-4 cm. Aerial stem 6-8-ridged, ridge abaxially nearly rectangular or arc-shaped, middle portion with or without shallow grooves, with 1 row of tubercles on each side; sheath ca. 0.2 cm, green but distal and middle portion with a blackish brown band; sheath teeth 6-8, usually spreading, deltoid, ca. 0.1 cm, teeth of middle portion blackish brown, white at margin, membranous, abaxially 4-ridged at base, apex acute and shortly aristate, persistent. Strobilus ellipsoid, 0.5-0.8 cm, 0.2-0.4 cm in diam., apex with acute tip, sessile. 2n = 216.

Forests, under bushes, valleys, meadows, roadsides; 100-3700 m. ?Jilin, Liaoning, Nei Mongol, Sichuan, Xinjiang [Japan, Mongolia, Russia; SW Asia, Europe, North America (including Greenland)].

1 Plants up to 17 cm tall; sheath teeth open, white on margin.   9a subsp. variegatum
+ Plants up to 20 cm tall; sheath teeth curved inward, black on margin   9b subsp. alaskanum

Lower Taxa


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