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2 Leaves opposite, linear to lanceolate, in some species needle-like or nearly so; [collectively widespread] | |
3 Leaves simple and entire. | |
6 Corollas salverform or funnelform, the tube narrow and 20-40 mm long, red, yellow, white, or lavender; larger leaves 1-pinnately lobed, the ultimate segments linear (and not further divided or toothed) | |
6 Corollas variously funnelform, rotate, campanulate, the tube broadening and 3-21 mm long, lavender, white, blue, violet, or pink; larger leaves 1× or more (2-3) pinnately divided or lobed, the ultimate segments linear or broader (ovate, elliptic). | |
7 Leaves 1-pinnately compound, the leaflets ovate or elliptic, 5-16 mm wide, entire; corollas campanulate, borne in a corymb | |
8 Inflorescences of bracted terminal heads or head-like clusters (sometimes looser); leaf lobes linear. | |
9 Inflorescence bracts not spinose; inflorescence on a long peduncle; flowers blue; plant 1-9 dm tall | |
9 Inflorescence bracts spine-tipped; inflorescence not long-pedunculate, subtended by bracts; flowers white; plant < 1 dm tall |