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Hoary Aster
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Dieteria canescens
  

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About Hoary Aster (Dieteria canescens) Machaeranthera canescens (syn. Dieteria canescens) is a species of flowering plant in the aster family known by the common names hoary tansyaster and hoary-aster. It is native to western and central North America, where it is a common plant in many regions and habitat types. It is a woolly-haired, hairy annual or perennial herb with one or more branching stems sometimes exceeding a meter in height. The linear to oblong leaves may reach 10 centimeters long near the base of the stems, their edges usually serrated or toothed. The flower cluster bears one or more flower heads lined with several layers of pointed, curling or curving phyllaries. The head has a center of many yellow disc florets and a fringe of blue or purple ray florets each 1 to 2 centimeters long. The fruit is an achene around 3 millimeters in length tipped with a pappus of long hairs.
Plant Description
Plant Type
Perennial herb

Max. Height
4 ft (1.2 m)

Native Status
Native

Natural Setting
Sun
Part Shade

Elevation ?
131' - 14090'

Annual Precip. ?
3.3" - 113.4"

Summer Precip. ?
0.21" - 3.93"

Coldest Month ?
10.8° F - 59.9° F

Hottest Month ?
34.1° F - 88.3° F

Humidity ?
0.53 vpd - 40.71 vpd

Landscaping Information
Propagation ?
For propagating by seed: No treatment.

Common uses
Butterfly Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available

Other Names
Botanical Names
Machaeranthera canescens

Common Names
Hoary Tansyaster


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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