- Repent, herbaceous. Flowering portions erect, to +30cm tall, glabrous or often strigose on angles.
- Opposite, petiolate. Petioles densely retrorse pubescent, reduced upward. Blades reniform to orbicular, to +3cm long (and wide), typically glabrous but also sparsely pubescent. Margins crenate.
- Axillary clusters of 2 or more flowers, secund. Pedicels to 1.5mm long.
- Corolla blue-purple, bilabiate, to +2cm long. Corolla tube bearded internally at apex, with purple spotting internally. Upper lip single-lobed, with notch at apex. Lower lip 3-lobed. Lateral lobes small, 2mm long. Central lobe 3-4mm long, 4mm broad, with dark purple spotting. Stamens 4, included. Style to 7mm long, white, glabrous. Stigma 2-lobed, purple. Calyx tubular, 6-7mm long, with 12-15 nerves(ridges), 5-lobed. Lobes acute to acuminate.
- This little plant is one of the first to bloom in the spring and is quite striking. It prefers a somewhat shaded location and moist ground. The plant was cultivated at first but is now escaped and quite common. The flowers produce 4 nutlets each. Since it is introduced, it should not be propagated outside of cultivation.
Steyermark lists two varieties in the state. Variety
has corollas to +2cm long. Variety
has corollas to 1.5cm long and is much more common.
Photographs taken in Columbia, MO., 4-15-04.
Following modified from Taiwan Biodiversity National Information Network
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all
Federal and State Noxious Weeds
This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of
Weeds of the U.S.
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