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1 Corolla creamy white; corolla tube exserted ca. 1 mm beyond the calyx, the tube about as long as the lobes; anthers exserted from corolla tube; small trees, usually single-trunked
1 Corolla lilac, lavender, or pink (rarely white in some cultivars); corolla tube exserted ca. 6-12 mm beyond the calyx, the tube much longer than the lobes; anthers included in corolla tube; shrubs, usually multi-stemmed