- Asyneuma prenanthoides — California harebell
- Campanula aparinoides — marsh bellflower
- Campanula aurita — Yukon bellflower
- Campanula lasiocarpa — common Alaska harebell
- Campanula parryi — Parry's northern harebell
- Campanula rotundifolia — American harebell
- Campanula scouleri — Scouler's bellflower
- Campanula uniflora — Arctic harebell
- Campanulastrum americanum — tall bellflower
- Downingia elegans — common downingia
- Downingia laeta — Great Basin downingia
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- Githopsis specularioides — common blue-cup
- Heterocodon rariflorum — western pearl-flower
- Lobelia cardinalis — cardinal-flower
- Lobelia dortmanna — water lobelia
- Lobelia inflata — Indian-tobacco
- Lobelia kalmii — Kalm's lobelia
- Lobelia siphilitica — great blue lobelia
- Lobelia spicata — palespike lobelia
- Lobelia x speciosa
- Triodanis perfoliata — claspingleaf Venus'-looking-glass
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