Japanese Mazus

Mazus pumilus

"Mazus pumilus" is a species of flowering plant in the Mazaceae family. It is native to south and east Asia, where it is found in Bhutan, China, India, Indonesia, Japan, Korea, Nepal, New Guinea, the Philippines, Russia, Taiwan, Thailand, and Vietnam. It is an invasive species in North America.
Japanese Mazus (Mazus pumilus) INTRODUCED/INVASIVE.
Growing in a meadowy clearing/lawn near a wetland. Fall,Geotagged,Mazus pumilus,United States

Appearance

It is an upright annual growing to 30 cm tall. Its flowers are purple and white with yellow spots on the throat. Flowers are produced throughout the growing season.
Mazus pumilus Japanese Mazus

https://www.jungledragon.com/image/149901/mazus_pumilus.html Japanese Mazus,Mazus pumilus

Habitat

Its natural habitat is wet grasslands, streambanks, and trailsides. It is tolerant of disturbance, and can be found in areas such as cultivated fields, sidewalk cracks, and waste ground. It is a very common species in Japan.

References:

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Taxonomy
KingdomPlantae
DivisionAngiosperms
ClassEudicots
OrderLamiales
FamilyMazaceae
GenusMazus
SpeciesM. pumilus