Jepson Herbarium
		University of California, Berkeley

Directory       News       Site Map       Home

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 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.)

Stem: annual, of 2 kinds.
Sterile stem: 30–100 cm, light green; basal internode of branch < subtending sheath; sheath 7–18 mm, ± as long as wide, teeth 14–28, 4–10 mm; branches with 4–5 grooved ridges, solid.
Fertile stem: 17–45 cm, fleshy, brown, ephemeral; sheath 1.5–4 cm, > that of sterile stem, teeth 20–30, 5–16 mm; branches 0.
Streambanks, roadside ditches, seepage areas; < 1000 m. Northwestern California (except High North Coast Ranges), High Cascade Range, n Sierra Nevada Foothills, n&c High Sierra Nevada, Central Western California (except Inner South Coast Ranges), Southwestern California (except San Jacinto Mountains);

Previous taxon: Equisetum palustre
Next taxon: Marsileaceae

Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

Copyright © 2012 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.

Bioregions in which taxon occurs	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.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.