(APETALAE AND CHORIPETALAE)
ORDER VERTICILLATAE
[FAMILY 45.] CASUARINACEAE
Trees or shrubs. Leaves scale-like, whorled, united into a sheath. Flowers unisexual, the male in spikes, the female in heads. Perianth of the male flowers consisting of two scales, in the female absent. Stamen 1. Anther opening by two longitudinal slits. Ovary 1-celled. Ovules 2, ascending, straight. Style very short, with 2 thread-shaped stigmas. Fruit dry, indehiscent, enclosed by woody bracteoles. Seed 1, without albumen. Embryo straight; radicle superior.
PIPERACEAE.
FLOW. PL. AFR.
Pl. 27.
J. Fleischmann del.
Piper guineense Schum.