• Photo of Dulichium arundinaceum var. arundinaceum (Dulichium arundinaceum var. arundinaceums)

Plant Profile: Dulichium arundinaceum var. arundinaceum

Names

Threeway Sedge

  • Photo of Dulichium arundinaceum var. arundinaceum (Dulichium arundinaceum var. arundinaceums)

Phonetic Spelling:dyoo-LEE-kee-um a-run-din-uh-KEE-um a-run-din-uh-KEE-um

Genus:Dulichium

Species:arundinaceum

Family:Cyperaceae

Threeway Sedge is a native grass belonging to the sedge family, prevalent in Canada and various regions of the United States, typically thriving along streambanks, bogs, and marshes. Its distinctive feature is the arrangement of its leaves, which appear in groups of three when viewed from above, leading to its common name. This plant flowers from July to October and thrives best in full sun to partial shade.

While Threeway Sedge is suitable for planting near marshes, bogs, ponds, or streams, it may be challenging to locate for purchase.

Dulichium arundinaceum var. arundinaceum Feature Summary

Dulichium arundinaceum var. arundinaceum Image Gallery

Tags

#water garden
#rain garden
#sedge
#wet sites
#stream banks
#NC native
#marshes
#food source fall
#Coastal OBL
#Piedmont Mountains OBL
#native sedge
#wet soils tolerant
#food source hard mast fruit
#bog gardens
#audubon
#wet soils intolerant

Similar Plants

Dulichium arundinaceum var. arundinaceum Feature Summary

Attributes
Fruit
Flat linear yellow fruits August to November
< 1 inch
Flowers
1-17 stalked spikes rise from the axils of leaf blades and have 3-10 spikelets around the central stalk. Flower has 2-ranked flower bracts, each with 1 flower in the axil. Blooms from July to October.
< 1 inch
Leaves
The leaf blade is up to 6 inches long and 0.3 inches wide, flat, non-splitting sheath, green. They are alternate and spiral the stem in threes (three ranked).
3-6 inches
Leathery
< 1 inch
Stem
Stem cylindric to slightly angular and hollow.
Whole Plant Traits
Perennial
Native Plant
Water Plant
Ornamental Grasses and Sedges
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Moist
Occasionally Wet
Frequent Standing Water
Coastal
Mountains
Piedmont
Landscape
Rain Garden
Water Garden
Naturalized Area
Riparian
Pond

Dulichium arundinaceum var. arundinaceum Attributes

Dulichium arundinaceum var. arundinaceum: Country Or Region Of Origin

Canada, U.S.A.

Dulichium arundinaceum var. arundinaceum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Dulichium arundinaceum var. arundinaceum Fruit

Dulichium arundinaceum var. arundinaceum: Fruit Description

Flat linear yellow fruits August to November

Dulichium arundinaceum var. arundinaceum: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Dulichium arundinaceum var. arundinaceum: Display/Harvest Time

Fall
Spring
Summer
Winter

Dulichium arundinaceum var. arundinaceum: Fruit Length

< 1 inch
1-3 inches
> 3 inches

Dulichium arundinaceum var. arundinaceum: Fruit Width

< 1 inch
1-3 inches
> 3 inches

Dulichium arundinaceum var. arundinaceum Flowers

Dulichium arundinaceum var. arundinaceum: Flower Description

1-17 stalked spikes rise from the axils of leaf blades and have 3-10 spikelets around the central stalk. Flower has 2-ranked flower bracts, each with 1 flower in the axil. Blooms from July to October.

Dulichium arundinaceum var. arundinaceum: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Dulichium arundinaceum var. arundinaceum: Flower Bloom Time

Winter
Spring
Summer
Fall

Dulichium arundinaceum var. arundinaceum: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Dulichium arundinaceum var. arundinaceum Leaves

Dulichium arundinaceum var. arundinaceum: Leaf Description

The leaf blade is up to 6 inches long and 0.3 inches wide, flat, non-splitting sheath, green. They are alternate and spiral the stem in threes (three ranked).

Dulichium arundinaceum var. arundinaceum: Leaf Color

spa
Green

Dulichium arundinaceum var. arundinaceum: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Dulichium arundinaceum var. arundinaceum: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Dulichium arundinaceum var. arundinaceum: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Dulichium arundinaceum var. arundinaceum: Hairs Present

No
Yes

Dulichium arundinaceum var. arundinaceum: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Dulichium arundinaceum var. arundinaceum: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Dulichium arundinaceum var. arundinaceum: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Dulichium arundinaceum var. arundinaceum Stem

Dulichium arundinaceum var. arundinaceum: Stem Description

Stem cylindric to slightly angular and hollow.

Dulichium arundinaceum var. arundinaceum: Stem Color

grass
Green

Dulichium arundinaceum var. arundinaceum: Stem Is Aromatic

No
Yes

Dulichium arundinaceum var. arundinaceum: Stem Cross Section

Angular
Oval
Round
Square

Dulichium arundinaceum var. arundinaceum Whole Plant Traits

Dulichium arundinaceum var. arundinaceum: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Dulichium arundinaceum var. arundinaceum: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Dulichium arundinaceum var. arundinaceum Cultural Conditions

Dulichium arundinaceum var. arundinaceum: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Dulichium arundinaceum var. arundinaceum: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Dulichium arundinaceum var. arundinaceum: NC Region

Coastal
Mountains
Piedmont

Dulichium arundinaceum var. arundinaceum Landscape

Dulichium arundinaceum var. arundinaceum: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Dulichium arundinaceum var. arundinaceum: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Dulichium arundinaceum var. arundinaceum: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland