| 1 | Corolla cup-shaped or almost rotate, divided almost to base into 4(-5) lobes; a woody subshrub 30-60 cm high; leaves often with reddish tinge
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| 1' | Corolla narrowly tubular with short lobes; leaves green |
| 2 | Flowers whitish or yellowish (tinged brown or pink) in narrow, elongate terminal spikes; perennial with a tough woody rootstock
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| 2' | Flowers pale or bright blue in hemispherical glomerules; annual |
