Advanced Search Map Locator
View Settings
Nurseries Carrying this Plant Add Current Plant To List Edit Current Plant
Show all Photos

About Calscape Nurseries
California Garden Planner Bay Area Garden Planner (NEW) Planting Guide
Butterflies My Plant Lists
Contact Calscape Donate
Tap map to see plants native to location
Order by Popularity Order by Common Name Order by Scientific Name Order by # of Butterflies Hosted
Show nursery cultivars Hide nursery cultivars
Show plants not in nurseries Hide plants not in nurseries
Grid view Text view
Epilobium obcordatum
About Rockfringe (Epilobium obcordatum) 0 Nurseries Carry This Plant Epilobium obcordatum is a species of willowherb known by the common name Rockfringe Willowherb. It is native to the western United States from California to Idaho, where it is found in rocky mountainous areas. This small perennial is clumpy to mat-forming and spreads from a woody caudex, especially in nooks between rocks. It has stems lined with oval or rounded leaves which spread parallel to the ground or ascend somewhat. At the tips of the thin stems are flowers each with four petals. The petals are magenta to purple, rounded and notched, often in a perfect heart shape, and are one or two centimeters long. The hairy, club-like, ridged fruit is a capsule two to four centimeters long growing on a short stalk.
Plant Description
Plant Type
Plant Type
Perennial herb

6 in tall

Flower Color
Flower Color

Wildlife Supported

Landscaping Information
Part Shade

Common uses
Common uses
Bird Gardens, Hummingbird Gardens

Sunset Zones
Sunset Zones?
1, 2, 4, 5, 6, 7, 14, 15, 16, 17

Natural Setting
Site Type
Site Type
Rocky places

Annual Precipitation: 8.6" - 115.4", Summer Precipitation: 0.35" - 4.03", Coldest Month: 17.9" - 42.0", Hottest Month: 38.4" - 77.4", Humidity: 0.97" - 25.87", Elevation: 960" - 14460"

Alternative Names
Common Names: Heart Willowherb, Heart Willowweed, Rockfringe Willowherb

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