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Family: portulacaceae
Common name(s): bitter-root
Hardiness ratings: USDA zone 3~6 - 8~10 
General resources
Links for Lewisia cotyledon
- Alpine Garden Society - Ulster - Plant of the month profile
 (6 photos)
- Annie's Annuals: Lewisia cotyledon 'Magenta' (on archive.org) - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 6-10) (2 photos). Also a page for 'Sunset Strain'.
- BBC Gardening: Lewisia cotyledon Ashwood strain - Plant profile with horticultural details and garden uses. (1 photo). Also a page for Hybrids.
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6-8) (13 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (zone 6) (8 photos)
- Garden.org - Community-assembled plant profile (6 varieties in database) (22 photos)
- Heritage Perennials: Lewisia cotyledon Hybrid Mixture - Profile with description and horticultural details. (additional pages for other varieties) (zone 3-9) (1 photo)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (3 photos)
- Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 4-8) (1 photo)
- NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (1 photo)
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (1 photo). Also pages for another instance, another instance, another instance, another instance, 'Rondo', 'Siskiyou Pink', 'Sunset Pink', and 'Sunset Red'.
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 4-8) (5 photos)
- Turner Photographics - Profile of wildflower of the US Pacific Northwest, with botanical description, habitat and distribution, and photo gallery.
Links
- Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (1 photo)
Links
- Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (2 photos). Also a page for another instance.
Common name(s): Button Rockrose
Common name(s): Cliff Maids; Siskiyou Lewisia
Hardiness ratings: USDA zone 6
Links
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