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
Juncus rugulosus

Zoom To My AddressZoom To California Estimated Plant Range

About Wrinkled Rush (Juncus rugulosus) Juncus rugulosus is a species of rush known by the common name wrinkled rush. It is endemic to California, where it is a common member of the flora in many wet areas, such as marshes and riverbanks. This is a perennial herb growing in thick tufts from a horizontal rhizome. The stem is erect and green and has a distinctive wrinkled, rippled surface. It reaches a maximum height near 70 centimeters. There are few leaves, those growing at the base lacking blades and appearing as sheaths around the stem, and those further up the stem having cylindrical blades. The flower cluster is open, with spreading branches holding many small clusters of a few flowers each. There are small, clear leafs. Each flower has reddish or brownish green petals with thin, transparent margins, and bristles at the tip. There are six stamens. The fruit is a red or brown capsule which is larger than the flower in which it grows.
Plant Description
Plant Type

Max. Height
2.3 ft (0.7 m)

There are few leaves, those growing at the base lacking blades and appearing as sheaths around the stem, and those further up the stem having cylindrical blades.

Flower Color

Native Status

Natural Setting
Site Type
Wet places

Part Shade

Elevation ?
-38' - 8465'

Annual Precip. ?
3.0" - 49.3"

Summer Precip. ?
0.20" - 2.91"

Coldest Month ?
31.6° F - 58.9° F

Hottest Month ?
56.6° F - 88.8° F

Humidity ?
1.36 vpd - 39.49 vpd

Soil PH
5.8 - 7.4


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

Nursery Availability
Sometimes Available

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