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Fragrant Flatsedge Back to Plant Page
Cyperus odoratus

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About Fragrant Flatsedge (Cyperus odoratus) Cyperus odoratus is a species of sedge known by the common names fragrant flatsedge and rusty flatsedge. This plant can be found in much of the tropical and warm temperate world, including South, Central, and North America, Southeast Asia, some Pacific Islands, Australia, New Guinea, Madagascar, and central Africa. It is a plant of wet, muddy areas, including disturbed and altered sites. This species is quite variable and may in fact be more than one species included under one name. In general this is an annual plant approaching half a meter in height on average but known to grow much taller. It usually has some long, thin leaves around the base. The inflorescence is made up of one to several cylindrical spikes attached at a common point. Each of the spikes bears a large number of flat, oval-shaped spikelets. Each spikelet is usually light brown to reddish-brown and has a few to over 20 flowers. Each flower is covered by a tough, flat bract with a visible midvein. The fruit is a flat achene less than two millimeters long.
Plant Description
Plant Type

Max. Height
1 - 2 ft (0.3 - 0.6 m)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Elevation ?
-230' - 7419'

Annual Precip. ?
2.6" - 47.4"

Summer Precip. ?
0.15" - 2.45"

Coldest Month ?
33.5° F - 61.4° F

Hottest Month ?
61.0° F - 89.3° F

Humidity ?
0.97 vpd - 42.79 vpd

Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Rusty Flatsedge

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

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