Figure 1.

Plant architecture under SD conditions. A, Terminal inflorescence showing the terminal flower and two type-2 axillary flowers below. B, Diagram summarizing the main features of plant architecture and the different types of axillary structures and flowers. C, Rudimentary flower composed of only two unexpanded petals and one filament (arrow). D, Rudimentary flower consisting of one single filament. E, Rudimentary flower borne on an axillary shoot, composed of one single sepal. F, Mosaic between a type-2 flower and an axillary inflorescence showing a fasciated pedicel bearing three pods but no bract. G, Mosaic between an axillary inflorescence and a flowering axillary shoot showing a flower subtended by a leaf-bract mosaic fused to the base of a shoot grown in the axil of a main stem leaf. H, Same as G, but the pedicel of the flower at the base of the shoot is adnate to the shoot stem. as, Stem of an axillary shoot; pe, petiole of a main stem leaf; p, pedicel; st, main stem; s, sepal.