Carpels reduced in number relative to the perianth to isomerous with the perianth. The pistil 1 celled. Ovary 1 locular. Placentation free central. Seeds non-endospermic .
Cotyledons connate into a tube enclosing the plumule.
Physiology, biochemistry . Iridoids not detected. Anatomy non-C 4 type. Peculiar feature . Geography, cytology .