Azuki; Plant photoperiodism
One variety, Adsuki beans (Phaseolus angularis or Vigna angularis) has been demonstrated to be photoperiodically sensitive, flowering within fifty days or in the three to five internode stage when grown under "short day" conditions and remaining vegetative for at least 70 days or past the 12 internode stage under "long day" conditions.
Clapp, T. W.,
Johnson, V. L.
Photoperiodicity in Adsuki Beans, a Preliminary Report.
Journal of the Minnesota Academy of Science, Vol. 45 No.3, 16-17.
Retrieved from https://digitalcommons.morris.umn.edu/jmas/vol45/iss3/6