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Key to Aloysia

Verbenaceae

Aloysia

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1 Leaf blade 4-21 mm wide, ca. 1.2-1.7× as long as wide; leaf margin with 6-12+ regular teeth on each margin; leaf upper surface strongly rugose; corolla violet, lavender, pink , or reddish
1 Leaf blade 2-8 mm wide, ca. 2-4× as long as wide; leaf margin entire or with 1-4 sharp and divergent teeth on each margin; leaf upper surface plane; corolla white or very light violet.
  2 Leaf blade narrowly oblong or elliptic, entire; lower leaf surface appressed-puberulent
  2 Leaf blade broadly elliptic, obovate, or oblong-elliptic, the larger leaves usually 2-8-toothed; lower leaf surface densely strigillose and shortly hispidulous on the veins
 Aloysia gratissima var. schulziana