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.
Etymology: (Latin: horse, bristle, from roots of Equisetum fluviatile L.)
Equisetum hyemale L. subsp. affine (Engelm.) Calder & Roy L. Taylor
NATIVE Stem: perennial herb, of 1 kind, 60--210 cm, green, scabrous; sheath 7--17 mm, +- as long as wide, generally with 2 dark bands, 1 at base, 1 at tip, teeth 22--50, generally deciduous; branches 0. Sporangia: cone tip pointed; spores green, spheric. Ecology: Streams, moist, sandy, gravelly areas; Elevation: < 2500 m. Bioregional Distribution: NCo, KR, NCoRH, NCoRO, CaR, SN (exc Teh), GV, CW (exc SCoRI), SW (exc s ChI), Wrn, SNE, D; Distribution Outside California: North America, Mexico, Guatemala. Note: 1 other subsp., in Europe, Asia. Synonyms: Equisetum hyemale var. californicum Milde; Equisetum hyemale var. robustum (A. Braun) A.A. Eaton Jepson eFlora Author: Robert E. Preston & Richard L. Hauke Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Equisetum ×ferrissii Next taxon: Equisetum laevigatum
Botanical illustration including Equisetum hyemale subsp. affine
Citation for this treatment: Robert E. Preston & Richard L. Hauke 2012, Equisetum hyemale subsp. affine, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=50315, accessed on April 17, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 17, 2024.
Geographic subdivisions for Equisetum hyemale subsp. affine:
NCo, KR, NCoRH, NCoRO, CaR, SN (exc Teh), GV, CW (exc SCoRI), SW (exc s ChI), Wrn, SNE, D
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(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).
Data provided by the participants of the
Consortium of California Herbaria.
MAP LEGEND View all CCH records All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).
