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Family: campanulaceae
Common name(s): round-headed rampion
Hardiness ratings: USDA zone 5~6 - 8 
General resources
- Wikipedia. Online encyclopedia entry (if defined).
- Google images. Web search for photographs.
- GRIN. Taxonomical details, with common names, distribution, and synonyms.
- The Plant List. Taxonomical lookup
Links for Phyteuma orbiculare
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6-8)
 (2 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 5)
- Iris' Garden - Gardener in the Netherlands presents a photo of this plant, with basic horticultural information. (1 photo)
- Ontario Rock Garden Society - Germination information
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (3 photos)
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