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Calycadenia micrantha
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Small-flowered Calycadenia
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Calycadenia micrantha

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About Small-flowered Calycadenia (Calycadenia micrantha) Calycadenia micrantha is an uncommon species of flowering plant in the daisy family known by the common name small-flowered calycadenia. It is endemic to California, where it is known from about 13 occurrences that are widely spread over several counties, including Napa, Siskiyou, Shasta, Mendocino, Trinity, and Monterey Counties, with several populations known in Lake County. It was described to science as a species in 2004. Some specimens of the plant had previously been included within the description of its relative, Calycadenia truncata. The fact that it has been found in relatively far-flung locations suggests it could easily be present in other areas between them and, as a newly classified species, has simply not been reported yet. This annual plant produces a slender purplish stem 10 to 50 centimeters tall. The hairy leaves are 2 to 5 centimeters long. The inflorescence is a single flower head or small cluster of heads, each with 1 to 6 three-lobed yellow ray florets. Unlike other Calycadenia species, this plant is self-compatible, or able to fertilize itself.
Plant Description
Plant Type
Annual herb

Max. Height
0.33 - 1.6 ft (0.1 - 0.49 m)

Flower Color

Native Status
Natural Setting
Elevation ?
1214' - 4896'

Annual Precip. ?
20.6" - 62.8"

Summer Precip. ?
0.41" - 1.19"

Coldest Month ?
37.1° F - 47.6° F

Hottest Month ?
61.7° F - 76.2° F

Humidity ?
0.29 vpd - 23.60 vpd

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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