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Plant Guide: Hoary tansyaster (Machaeranthera canescens)Author(s): Derek Tilley; Dan Ogle; Loren St. John
Source: Aberdeen, ID: U. S. Department of Agriculture, Natural Resources Conservation Service, Aberdeen Plant Materials Center. 4 p.
Publication Series: Miscellaneous
Station: Rocky Mountain Research Station
PDF: Download Publication (285.26 KB)
DescriptionSunflower family (Asteraceae). Hoary tansyaster is a short-lived perennial forb with pale to dark purple flowers. Plants are 15 to 75 cm (6 to 30 in) tall with diffuse branching. Leaves are about 5 cm (2 in) long and 6 mm (0.25 in) wide, oblong or lance shaped with entire to sharply toothed margin. Flower heads have many subtending bracts that reflex away from the flower at the tip (Welsh et al., 2003). Flower heads and vegetation are very sticky and heavily scented. Bracts are white and membranous at the bottom and green at the tip. The pappus of the achene is dirty white and hair-like. There are approximately 1.3 million seeds/lb based on seed counts conducted by Aberdeen Plant Materials Center (Tilley and St. John, 2010).
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CitationTilley, Derek; Ogle, Dan; St. John, Loren. 2014. Plant Guide: Hoary tansyaster (Machaeranthera canescens). Aberdeen, ID: U. S. Department of Agriculture, Natural Resources Conservation Service, Aberdeen Plant Materials Center. 4 p.
Keywordsrestoration, reclamation, pollinators, wildlife habitat, sage grouse, rangeland, range, perennial forb
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