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Irisleaf Rush
Juncus xiphioides

About Irisleaf Rush (Juncus xiphioides) Juncus xiphioides is a species of rush known by the common name irisleaf rush. It is native to the southwestern United States and Baja California where it grows in wet areas in many habitat types. This is a rhizomatous perennial herb producing erect stems to a maximum height between about 40 and 80 centimeters. It has wide leaf blades for a rush, often exceeding one centimeter in width at the base. The few straw-colored leaves reach up to 40 centimeters in length. The large flower cluster has many clusters of up to 70 flowers each. The flower has very narrow green, red, or yellow-brown, lance-shaped petals and six stamens with very small anthers. The fruit is a brown oblong capsule.
Plant Description
Plant Type

Max. Height
1 - 3 ft (0.3 - 0.9 m)

Max. Width
1 - 6 ft (0.3 - 1.8 m)

Mounding, Spreading

Growth Rate


Gray-green blades

Flower Color
Brown, Yellow, Red

Flowering Season
Spring, Summer

Native Status

Natural Setting
Site Type
Wet places, meadows, creeks

Part Shade

Elevation ?
1' - 8798'

Annual Precip. ?
4.0" - 154.1"

Summer Precip. ?
0.14" - 5.94"

Coldest Month ?
25.6° F - 58.3° F

Hottest Month ?
52.1° F - 87.0° F

Humidity ?
0.54 vpd - 40.66 vpd

Soil Description

Soil PH
5 - 7

Fast, Medium, Slow

Cold Tolerance(° F)
Tolerates cold to 10 - 20° F

Wildlife Attracted
Attracts birds

Landscaping Information
Ease of Care
Very Easy

Water Requirement ?
Moderate - High
Extremely Low
Very Low
Moderate - High

Moderately Popular

Max. Summer Water ?
Keep moist
No Summer Water
Keep moist

Common uses
Bogs and Ponds

Nursery Availability
Commonly Available

Other Names
Common Names
Iris-leaved Rush

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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