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Mountain Sweet Cicely
Osmorhiza occidentalis
About Mountain Sweet Cicely (Osmorhiza occidentalis) 0 Nurseries Carry This Plant Osmorhiza occidentalis is a species of flowering plant in the carrot family known by the common name western sweetroot. It is native to much of western North America, where it grows in wooded and forested areas. It is an erect perennial herb up sometimes exceeding one meter tall. The green leaves have blades up to 20 centimeters long which are divided into toothed and irregularly cut leaflets. The blade is borne on a long petiole. The flower cluster is a compound umbel of many tiny yellowish flowers at the tip of a stemlike peduncle. The fruit is elongated and narrow, up to 2.2 centimeters long. Many Native American groups used this plant for a great variety of medicinal purposes.
Plant Description
Plant Type
Plant Type
Perennial herb

2 - 4 ft tall


Growth Rate
Growth Rate

Flower Color
Flower Color

Flowering Season
Flowering Season

Wildlife Supported

Butterflies & moths hosted ( 1 confirmed , 1 likely * ) SHOW ALL
Agonopterix rosaciliella Image
Agonopterix rosaciliellaAgonopterix rosaciliella

Landscaping Information
Full Sun, Part Shade

Soil Description
Soil Description
Adaptable, tolerant of sand, loam and clay

For propagating by seed: 2 mos. stratification (Emery and Frey 1971).

Natural Setting
Annual Precipitation: 16.2" - 131.3", Summer Precipitation: 0.44" - 4.41", Coldest Month: 23.3" - 48.8", Hottest Month: 44.2" - 75.0", Humidity: 0.68" - 23.12", Elevation: 174" - 11527"

Alternative Names
Common Names: Sweetanise, Western Sweetroot

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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