|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Perennial herb from rhizome. Stem: annual to perennial herb, generally erect, of 2 kinds (sterile, fertile) or not; internodes with lengthwise alternating ridges and grooves, hollow except at nodes, branches 0 or whorled, alternate leaves. Leaf: scale-like, whorled, fused into nodal sheath with as many teeth as leaves, generally not green. Sporangia: several on inner surface of peltate scales that are clustered into a terminal cone; spores of 1 kind, spheric, green, unmarked, with 4 strap-like appendages.
1 genus, 15 species: worldwide except Australia, New Zealand. [Hauke 1993 FNANM 2:76–84] —Scientific Editors: Alan R. Smith, Thomas J. Rosatti.
(Latin: horse, bristle, from roots of Equisetum fluviatile L.)Key to Equisetum
Stem: annual, of 2 kinds. Sterile stem: 10–60 cm, green; basal internode of branch > subtending sheath; sheath 3–8.5 mm, ± as long as wide, teeth 6–14, 1.5–3.5 mm, dark, often joined but not fused; branch with 3–4 rounded ridges, solid. Fertile stem: 11–32 cm, unbranched, fleshy, brown, ephemeral; sheath 5–11 mm, > that of sterile stem, teeth 6–10, 3–7.5 mm.
Streambanks, wet meadows, springs, other wet, shaded places; < 3050 m. Northwestern California (except High North Coast Ranges), Cascade Range, Sierra Nevada (except Tehachapi Mountain Area), Great Central Valley, Central Coast, San Francisco Bay Area, Outer South Coast Ranges, Southwestern California (except Channel Islands), Modoc Plateau, East of Sierra Nevada, Mojave Desert (except Desert Mountains); North America, Europe, Asia. [Online Interchange]
Previous taxon: Equisetum
Next taxon: Equisetum X ferrissii
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 29 2015
Citation for this treatment: [Author of taxon treatment] 2013. Equisetum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=24416, accessed on Jul 29 2015
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|Geographic subdivisions indicated for the distribution of Equisetum arvense|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month