(1) Sphagnum samples were taken from the medium-long or outer branches of the capitulum .(2) The temporal phases of staminate and pistillate flowers never overlap in the same capitulum , although different capitula of the same individual plant may be in different phases at any given moment.(3) First anthesis was reached when stamens became visible on the outer ring of flowers on the capitulum .(4) The B concentration in the capitulum of the plants sprayed at the highest rate was between 37 and 93% of that in the control plants.(5) The total number of capitula produced per flowering plant, estimated on 85 accessible individuals, ranged from 3 to 140.
