Wetland and Aquatic Plants
of
Oklahoma
Interactive Keys: Emergent
Grasslike
Sedges (Cyperaceae)
2. Spikerushes (Eleocharis spp.)
a. Stems square
b. Stems flattened
c. Stems round
d. Small plants growing on recently exposed shorelines
Stems square
Squarestem spikerush (Eleocharis
quadrangulata (Michx.)
Roemer & J.A.
Schultes)
Native perennial
click on thumbnails to enlarge
NWI status:
OBL
Stems flattened (see also
common spikerush)
Flatstem
spikerush (Eleocharis compressa Sullivant)
Native perennial.
Note: A very common spikerush throughout Oklahoma. The long, pointed (acuminate)
distinguishes
flatstem spikerush from common spikerush plants with flat stems.
NWI status:
FACW+
Stems
round
Purple
spikerush (Eleocharis
atropurpurea (Retz.) J. &. K. Presl)
Native annual.
NWI status:
FACW
Bald
spikerush (Eleocharis
erythropoda
Steud.)
Native perennial.
NWI status:
OBL
Canada
spikerush (Eleocharis geniculata
(L.) Roemer & J.A. Schultes)
Native
annual.
NWI status:
FACW
Daggerleaf
spikerush (Eleocharis lanceolata
Fern.)
Native annual.
NWI status:
FACW
Sand
spikerush (Eleocharis montevidensis
Kunth)
Native perennial.
Note: A very common spikerush throughout Oklahoma.
NWI status:
FACW+
Blunt
spikerush (Eleocharis obtusa
(Willd.) J.A. Schultes)
Native
perennial.
NWI status:
OBL
Common
spikerush (Eleocharis palustris
(L.) Roemer & J.A. Schultes)
Native Perennial.
Note: Probably the most common spikerush in
Oklahoma. In many cases, the stems are
flattenad like
those of flatstem spikerush.
NWI status:
OBL
Beaked
spikerush (Eleocharis rostellata
(Torr.) Torr.)
Native perennial.
NWI status:
OBL
Small plants growing on recently exposed
shorelines
Needle
spikerush (Eleocharis acicularis
(L.) Roemer & J.A. Schultes)
Native annual.
NWI status:
OBL
Dwarf
spikerush (Eleocharis parvula
(Roemer & J.A. Schultes) Link ex Bluff, Nees & Schauer)
Native annual.
NWI status:
OBL
Rooted
spikerush (Eleocharis radicans (A.
Dietr.) Kunth)
Native perennial.
NWI
status: OBL
Slender
spikerush (Eleocharis
tenuis (Willd.) J.A. Schultes)
Native perennial.
NWI status:
FACW
Last update: 2/21/04
Comments to : Bruce Hoagland
bhoagland@ou.edu
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