040104 Equisetum sylvaticum L.
Distribution
Northern Iceland: Rare
Northern Fennoscandia: Frequent
Kanin - Pechora: Scattered
Polar Ural - Novaya Zemlya: Presence uncertain
Yamal - Gydan: Rare
Taimyr - Severnaya Zemlya: Rare
South Chukotka: Scattered
East Chukotka: Rare
Western Alaska: Scattered
Central Canada: Rare
Hudson Bay - Labrador: Rare
Western Greenland: Scattered
Southern Arcti Tundra: Rare
Shrub Tundra: Scattered
Bordering boreal or alpine areas: Frequent
- L., Sp. Pl.: 1061 (1753). Lectotype (LINN): Europe. Herb. Linn. 1241.1 (Jonsell and Jarvis 1994: 148).
- Equisetum sylvaticum var. pauciramosum Milde, Monogr. Equiset.: 292 (1867). Described from Labrador (Canada).
2n=
216 (2x). - Europe, Canada. - Several reports.
Geography: Circumboreal-polar: ICE NOR RUS SIB RFE ALA CAN GRL.
Notes: Elven and Solstad: Authors concerned with Greenland have, at least as late as Feilberg (1984b), accepted two varieties of Equisetum sylvaticum - var. sylvaticum and var. pauciramosum - the latter more low-grown, less branched with less rough branches, and more northernly distributed. Similar plants occur in the northern parts of Europe, Siberia, Alaska, and Canada. Porsild (1951, 1975) accepted var. pauciramosum for the Yukon Territory. The differences between the arctic plants and the more southern ones are rather impressive and do not only concern size. However, there is yet no circumpolar evaluation supporting two races, and the variation may be clinal. We have compared some material and do not find a discontinuity in the characters, especially not in the most diagnostic one reported (rough vs. smooth branches). We do not accept the races for the Checklist.
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Source: BerndH at Wikispecies
Higher Taxa
- Equisetum [0401,genus]