Equisetum hiemale var. californicum Milde
FamilyEquisetaceae — APG family: Equisetaceae
SynonymsHippochaete hiemale var. californica (Milde ) Farw., Equisetum hiemale var. robustum, Equisetum hiemale var. affine
DescriptionRhizome stout, long, branched, felted; stem branchless, thick, strongly striate, scabrous, evergreen, up to 50 cm tall, with a central cavity of two-thirds the diam- eter; sheaths cylindrical, whitish, with dark-brown band at base; teeth numerous, dark brown, with broad scarious margins falling off in old specimens; cones apicu- late, short-stalked.
EcologySandy shores, woods, rare within our area. E. hiemale described from Europe, var. californicum from California.
An extremely variable species, composed of several not very distinct taxa. Alaskan specimens have two rows of silica tubercles on ridges of stem, and are referred to var. californicum, a western American type. Circumpolar map indicates range of entire, very complicated, species complex.
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.