Equisetum variegatum Schleich.
FamilyEquisetaceae — APG family: Equisetaceae
SynonymsHippochaete variegatum (Schleich.) Borner.
DescriptionCreeping, black rhizome with ascending tufted evergreen stems about 2 mm thick, each with a narrow central cavity and 6-8 ridges; ridges flat-topped (in contrast to those of E. scirpoides), with 2 rows of silica tubercles at top and a shallow groove between them; ridges end in scarious-margined teeth of sheaths, which are equal in number to ridges; cones subsessile, apiculate.
EcologyWoods and tundra, scree slopes, in alpine zone.
Small specimens (var. anceps Milde) are similar to E. scirpoides. In an area north of the southern coast, specimens occur that have thicker stems and more numerous ridges than typical E. variegatum. In southern Alaska, subsp. variegatum is replaced by a more robust race, subsp. alaskanum (see next description).
Hultén's Flora About

This is a digital representation of Eric Hultén’s ‘Flora of Alaska and Neighboring Territories: A Manual of the Vascular Plants’, which was published by Stanford University Press in 1968. The book was digitized by C. Webb (at UAMN) as part of the Flora of Alaska project, with funding by the US NSF (Grant 1759964 to Ickert-Bond & Webb), and with permission of Stanford University Press. Data and images © 1968 Board of Trustees of the Leland Stanford Jr. Univ. Usage licence: Creative Commons BY-NC-SA 4.0. NB: You may find OCR errors; please refer to the hard-copy if in doubt.