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Doublehorn Calicoflower Back to Plant Page
Downingia bicornuta

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About Doublehorn Calicoflower (Downingia bicornuta) Downingia bicornuta is a species of flowering plant in the bellflower family known by the common name doublehorn calicoflower. This showy wildflower is native to the western United States from California to Idaho, where it is a resident of lakesides and vernal pool ecosystems. This annual grows on a branching erect stem with small leaves at intervals. At the top of each stem branch is one or more flowers, each between one and two centimeters wide. The flower has two long, narrow, pointed upper lobes which may be blue or purple. The three lower lobes are fused into one three-lobed surface, which is blue or purple with two bright yellow blotches rimmed with white in the center. The mouth of the flower tube is surrounded by knobby projections of the sepals. The fruit is a dehiscent capsule three to seven centimeters long.
Plant Description
Plant Type
Annual herb

Max. Height
9.6 in (24.4 cm)


Growth Rate

Flower Color

Flowering Season

Native Status

Natural Setting
Elevation ?
9' - 5748'

Annual Precip. ?
7.0" - 75.0"

Summer Precip. ?
0.17" - 2.45"

Coldest Month ?
26.3° F - 52.0° F

Hottest Month ?
57.8° F - 77.4° F

Humidity ?
0.53 vpd - 26.55 vpd

Soil Description
Prefers loamy or clay soils. Grows poorly in sandy soils.

Landscaping Information
Nursery Availability
Never or Almost Never 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

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