(1) What probably happened is that a light frost killed the pollen in the male stamen at a temperature just below freezing, but leaving the female receptive.

(2) Instead of leaves, a floral meristem gives rise in sequence to sepals, petals, stamens , and carpels.

(3) Unisexual flowers with three white petals produce numerous stamens or carpels and both present floral nectar.

(4) There were ten functional stamens in each flower collected.

(5) Artificial pollination was effected by brushing the recipient flower stigmas with stamens from the pollen donors.