blue, orange, red, white
March - November
0.1 - 0.3
May be distinguished from Anagallis minima by its leaves which are opposite while those of A. minima are alternate. Sessile leaves, no teeth, no hairs. Reddish flowers, sometimes blue, 5 petals. Stem squared and winged.
This species germinates best at a constant low temperature (7-20 degrees C). Alternating temperatures was not as effective as a constant temperature in the optimum range (Lauer 1953). Light is required for best germination (Lipp and Ballard 1963).
Often found in wet or moist places.