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Family: poaceae
Common name(s): (Bitter Switchgrass)
Hardiness ratings: USDA zone 2~3 - 9 
General resources
Links for Panicum amarum
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments.
- Denver Botanic Gardens: Panicum amarum 'Dewey Blue' - Description, native range, and cultural requirements. (zone 2)
 (7 photos)
- Digging Dog Nursery: Panicum amarum 'Dewey Blue' - Catalog page with descriptive information (zone 3)
- Garden.org: Panicum amarum 'Dewey Blue' - Community-assembled plant profile (2 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (10 photos)
- Missouri Botanical Garden: Panicum amarum 'Dewey Blue' - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 2-9) (5 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 2-9a) (7 photos)
- Plant Delights Nursery: Panicum amarum 'Dewey Blue' - Catalog page with photo, horticultural basics, and descriptive blurb. (1 photo)
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