Tsuchiya, T. 1975. Tsuchiya, T. 1984. BGN 14 21-24, 12. Tsuchiya, T. and R. L. Haines. Woodward, R. W. 1957.
Some plants are almost entirely yellow colored and similar to chlorina.
Cold treatment may help development of the trait. Singh, R. J. and T. Tsuchiya. Tsuchiya, T. and J. Alanko. Tsuchiya, T. and A. Shahla.