1	"Annual, in dry places"	2
1	"Perennial herb, in dry places or not"	5
2	"Leaf oblong-ovate; ovary obovoid to spheric"	"Campanula angustiflora"
2	"Leaf +- linear or lanceolate; ovary oblong"	3
3	"Corolla < 4 mm"	"Campanula griffinii"
3	"Corolla > 7 mm"	4
4	"Upper leaves, bracts +- linear; ovary (hypanthium surface) hairy but not papillate"	"Campanula exigua"
4	"Upper leaves, bracts widely lanceolate; ovary papillate"	"Campanula sharsmithiae"
5	"Style >> corolla, well exserted"	"Campanula scouleri"
5	"Style <= corolla, not exserted"	6
6	"Plant hairy throughout"	7
6	"Plant hairs 0 or only on leaf margins, stem angles, sepals"	8
7	"Leaf +- 30 mm, entire"	"Campanula scabrella"
7	"Leaf 6--7 mm, with few large teeth"	"Campanula shetleri"
8	"Leaf margin entire; cauline leaf 30--60 mm"	"Campanula rotundifolia"
8	"Leaf margin +- sharp-toothed or crenate; cauline leaf < 20 mm"	9
9	"Leaf ovate, margin crenate, with recurved, stiff hairs; corolla bell-shaped; coastal"	"Campanula californica"
9	"Leaf narrowly oblong, margin with few sharp teeth, glabrous; corolla funnel-shaped; inland"	"Campanula wilkinsiana"