In situ hybridization with a SlSTM1 and SlSTM2 probe. Sections of S. latifolia flower buds hybridized with a SlSTM1 and SlSTM2-specific probe. The signal appears in gray or black. The sex of the individuals is indicated above each column, and the stages of development are indicated on the right of each row. se, sepal primordia; pe, petal primordia; st, stamen primordia; ca, carpel primordia; f, filament primordia. (Scale bars: 20 μm.)