Dig deeper at SERNEC, a consortium of southeastern herbaria.

See herbarium specimens at the Atlas of Florida Vascular Plants

Learn more about Scouring Rush from the Vascular Plants of North Carolina website.

As interpreted by Christenhusz et al. (2019), American material often treated as synonymous or varietally or subspecifically distinct from Eurasian E. hyemale warrants specific recognition, based on morphology and molecular phylogeny, per Weakley's Flora (2022)

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Equisetum hyemale var. affine   FAMILY Equisetaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Equisetum hyemale var. affine

SYNONYMOUS WITH Flora of North America

Equisetum hyemale ssp. affine

SYNONYMOUS WITH Phylogenetics, classification and typification of extant horsetails (Equisetum, Equisetaceae) (Christenhusz et al., 2019)

Equisetum praealtum

SYNONYMOUS WITH The Ferns and Lycophytes of Texas (Diggs & Lipscomb, 2014)

Equisetum hyemale ssp. affine

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 002-01-002:

Equisetum hyemale var. affine   FAMILY Equisetaceae

SYNONYMOUS WITH Ferns of the Southeastern States (Small, 1938)

Equisetum praealtum

COMMON NAME:
Tall Scouring-rush, River Scouring-rush

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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_eqro_001_lvd

        

Terry Holdsclaw    tdh_e_hyemale_affine_5152

April    Orange County    NC

North Carolina Botanical Garden

Terry Holdsclaw    tdh_e_hyemale_affine_5154

April    Orange County    NC

North Carolina Botanical Garden

Leaves scale-like, in whorls. Sporangia in a terminal cone-like cluster, per Guide to the Wildflowers of SC (Porcher & Rayner, 2001).

Terry Holdsclaw    tdh_e_hyemale_affine_1

May    Orange County    NC

North Carolina Botanical Garden

Stems evergreen, unbranched, bamboo-like, fertile and sterile alike, per Field Guide to the Ferns and Other Pteridophytes of Georgia (Snyder & Bruce, 1986).

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Equisetum praealtum   FAMILY Equisetaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Equisetum hyemale var. affine   FAMILY Equisetaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Equisetum hyemale var. affine

SYNONYMOUS WITH Flora of North America
Equisetum hyemale ssp. affine

SYNONYMOUS WITH Phylogenetics, classification and typification of extant horsetails (Equisetum, Equisetaceae) (Christenhusz et al., 2019)
Equisetum praealtum

SYNONYMOUS WITH The Ferns and Lycophytes of Texas (Diggs & Lipscomb, 2014)
Equisetum hyemale ssp. affine

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 002-01-002:
Equisetum hyemale var. affine   FAMILY Equisetaceae

SYNONYMOUS WITH Ferns of the Southeastern States (Small, 1938)
Equisetum praealtum