Appearance
It is an annual herb producing a hairy stem reaching maximum heights between 1 and 31 centimeters. The oppositely arranged oval leaves are up to 4 centimeters in length and green in color, sometimes with purple undersides. The narrow, tubular base of each flower is encapsulated in a thick calyx of sepals with uneven lobes. The funnel-shaped flower is up to 4.5 centimeters long, opening into a wide mouth, its two upper lobes wider than the three lower. The flower is reddish-purple in color, darkening in the throat where it is spotted with yellow.References:
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