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Caltha leptosepala

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About Marsh Marigold (Caltha leptosepala) Caltha leptosepala (White Marsh Marigold, Twinflowered Marsh Marigold, or Broadleaved Marsh Marigold) is a species of flowering plant in the buttercup family. It is native to western North America from Alaska to New Mexico, where it grows in wet mountain habitats in alpine and subalpine regions. There are two general wild types of this species, one native to the interior and one that grows along the Pacific coast and coastal mountains, but these are not always treated separately. This is a perennial herb growing a mostly naked stem with leaves located basally. The leaves are up to 13 or 15 centimeters long and may have smooth, wrinkled, or toothed edges. The flower cluster bears one or more flowers. Each flower is 1 to 4 centimeters wide and lacks petals, having instead petallike sepals which are usually white or sometimes yellow. In the center are many long, flat stamens and fewer pistils.
Plant Description
Plant Type
Perennial herb

Max. Height
0.6 - 1.2 ft (0.18 - 0.37 m)


Growth Rate

Flower Color
White, Yellow

Flowering Season

Native Status

Natural Setting
Site Type
Marshes, pond Edges, streambanks,


Elevation ?
494' - 11474'

Annual Precip. ?
21.1" - 154.5"

Summer Precip. ?
0.30" - 5.93"

Coldest Month ?
23.4° F - 49.2° F

Hottest Month ?
44.4° F - 74.1° F

Humidity ?
0.73 vpd - 20.60 vpd

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


Sunset Zones ?
1*, 2*, 3, 4*, 5*, 6*, 7, 15, 16, 17

Landscaping Information
Common uses
Bogs and Ponds

Other Names
Botanical Names
Caltha leptosepala var. biflora|Caltha leptosepala ssp. howellii

Common Names
White Marsh Marigold

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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