“ The flower-tube bears at its summit four sepals, but only three petals and three perfect stamens, with indications of six others. The stamens, with the stalked ovary, are curved away from the petals at their base, but are directed towards them at their apices. The anthers and the stigmas are thus brought into such a position as to obstruct the passage of an insect attracted by the brilliantly-coloured petal, the inference of course being that insect visits are necessary for transference of pollen and the fertilization of the flower. ”