Equisetum ferrissii Clute. Common name: Ferriss's Horsetail. Phenology: May-Aug. Habitat: Riverbanks, wet forests. Distribution: There are old reports, repeated in RAB, S, and FNA, of the occurrence of E. ×ferrissii in NC and SC; documentation of these reports is not known; it is reported for Prince George's County, MD (Shetler & Orli 2000), for KY (Campbell & Medley 2007), and for all 75 counties of AR (Peck 2011).
Origin/Endemic status: Native
Taxonomy Comments: This is the hybrid of E. laevigatum and E. praealtum (= E. hyemale ssp. affine). It behaves as a species, often occurring independent of one or both parents.
Synonymy ⓘ: = G; = Equisetum ferrissii Clute — Ar, C, Can, FNA2, GrPl, Il, NE, NS, Pa, POWO, TxFerns, Christenhusz et al (2019); = Hippochaete ×ferrissii (Clute) Škoda & Holub; >< Equisetum ferrissii Clute — K4. Basionym: Equisetum ferrissii Clute 1904
Links to other floras: = Equisetum ×ferrissii - FNA2
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FACW (name change)
- Eastern Mountains and Piedmont: FACW (name change)
- Great Plains: FACW (name change)
- Midwest: FACW (name change)
- Northcentral & Northeast: FACW (name change)
Heliophily ⓘ: 5
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Horticultural Information
No horticultural data found for this taxon.