Directory       News       Site Map       Home
         
    Jepson eFlora: Taxon page
Key to families | Table of families and genera

Previous taxon 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 |
Previous taxon

EQUISETACEAE HORSETAIL FAMILY

Robert E. Preston & Richard L. Hauke

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.

EQUISETUM HORSETAIL, SCOURING RUSH
(Latin: horse, bristle, from roots of Equisetum fluviatile L.)

Key to Equisetum

E. telmateia Ehrh. subsp. braunii (J. Milde) Hauke GIANT HORSETAIL
NATIVE
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); along coast to British Columbia. 1 other subsp., in Europe, Asia. Records from higher elevations are likely Equisetum arvense. [Online Interchange]

Previous taxon: Equisetum palustre
Next taxon: Marsileaceae

Contact/Feedback

Name search

Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 22 2014
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=50317, accessed on Sep 22 2014

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.


click for enlargement Equisetum telmateia subsp. braunii
See CalPhotos for additional images
© 2007 Neal Kramer

Geographic subdivisions indicated for the distribution of Equisetum telmateia subsp. braunii 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
map of distribution 1
(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

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.