Dig deeper at SERNEC, a consortium of southeastern herbaria.

Read more about Redroot Flatsedge at Vascular Plants of North Carolina.

This species is frequently confused with C. odoratus, with which it is often closely associated. The neatly quadrangular spikelets with tiny (≤ 1.5 mm), closely imbricate scales (vs. terete, jointed spikelets with > 2 mm, loosely spaced scales) easily distinguish even depauperate plants of C. erythrorhizos at a glance, per Weakley's Flora (2022)

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Cyperus erythrorhizos   FAMILY Cyperaceae

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

Cyperus erythrorhizos

SYNONYMOUS WITH Flora of North America

Cyperus erythrorhizos

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 030-01-016:

Cyperus erythrorhizos   FAMILY Cyperaceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Cyperus erythrorhizos

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Cyperus halei

COMMON NAME:
Redroot Flatsedge

         To see larger pictures, click or hover over the thumbnails.

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_cyer2_001_lvd

        

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_cyer2_005_lvd

        

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_cyha8_001_lvd

        

Gill Newberry    gn09_c_erythrorhizos

September        

Spikes numerous, congested, cylindrical. Central sessile, lateral rays unequal, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Cyperus erythrorhizos   FAMILY Cyperaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Cyperus erythrorhizos   FAMILY Cyperaceae

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

SYNONYMOUS WITH Flora of North America
Cyperus erythrorhizos

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 030-01-016:
Cyperus erythrorhizos   FAMILY Cyperaceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Cyperus erythrorhizos

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Cyperus halei