Jepson eFlora: Taxon page
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Equisetum palustre
MARSH HORSETAIL

Higher Taxonomy
Family: EquisetaceaeView Description 

Common Name: HORSETAIL FAMILY
Habit: 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.
Genera In Family: 1 genus, 15 species: worldwide except Australia, New Zealand.
eFlora Treatment Author: Robert E. Preston & Richard L. Hauke
Scientific Editor: Alan R. Smith, Thomas J. Rosatti.
Genus: EquisetumView DescriptionDichotomous Key

Common Name: HORSETAIL, SCOURING RUSH

Etymology: (Latin: horse, bristle, from roots of Equisetum fluviatile L.)

Equisetum palustre L.
NATIVE
Stem: annual, of 1 kind, 20--80 cm, green; basal internode of branch < subtending sheath; sheath 4--9 mm, longer than wide, teeth 5--10, 2--5 mm, free; branches with 4--6 rounded ridges, hollow.
Ecology: Marshes; Elevation: < 300 m. Bioregional Distribution: NCoRI, CCo (San Francisco); Distribution Outside California: Oregon to Alaska, eastern North America. Note: Presence in California questionable; hybrids with Equisetum telmateia subsp. braunii reported questionably for California, from San Mateo, Marin cos.
eFlora Treatment Author: Robert E. Preston & Richard L. Hauke
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Equisetum laevigatum
Next taxon: Equisetum telmateia subsp. braunii

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botanical illustration including Equisetum palustre

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Citation for this treatment: Robert E. Preston & Richard L. Hauke 2016. Equisetum palustre, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=24434, accessed on May 27, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 27, 2016.


Geographic subdivisions for Equisetum palustre:
NCoRI, CCo (San Francisco);
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.