Advanced Search Map Locator
Add Current Plant To List Edit Current Plant
My Plant Lists Nurseries Planting Guide Contact Calscape About Calscape
Tap map to see plants native to location
Order by Popularity Order by Common Name Order by Botanical Name
Show All Plants Show Only Plants in Nurseries
Grid view Text view
Dulichium arundinaceum

Zoom To My AddressZoom To California Estimated Plant Range

About Threeway Sedge (Dulichium arundinaceum) Dulichium is a monotypic genus of sedge containing the single species Dulichium arundinaceum, which is known by the common name threeway sedge. This is an aquatic or semi-aquatic plant of the lakes, streams, and ponds of North America. It has a wide distribution, covering much of the continent. It has a thick rhizome system and grows to heights approaching a meter. It is reminiscent of bamboo in appearance when new, growing bright green erect stalks in large, grassy stands. The leaves sheath the stems, and the flower cluster grows from the leaf axilla. The spikelets are generally lance-shaped and one to three centimeters long when ripe.
Plant Description
Plant Type

Max. Height
2.6 - 3.3 ft (0.8 - 1 m)


Growth Rate

Flower Color
Brown, Green

Flowering Season

Native Status

Natural Setting
Site Type
Edges of lakes and ponds

Sun, Part Shade

Elevation ?
376' - 7574'

Annual Precip. ?
14.4" - 76.6"

Summer Precip. ?
0.26" - 2.34"

Coldest Month ?
28.4° F - 52.8° F

Hottest Month ?
55.1° F - 77.4° F

Humidity ?
1.15 vpd - 21.19 vpd

Soil Description
Adaptable, tolerant of sand, loam and clay

Sunset Zones ?
1*, 2*, 3, 4, 5, 6*, 7*, 14*, 15*, 16*, 17*, 18, 19, 20, 21, 22, 23, 24

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Three-way Sedge

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

Sign in to your Calscape Account X

Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address

Sign In