Labiatifloral

Few of the Labiatifloral Sub-order appear to be of any importance.

The Mutisiaceae form one of the two divisions into which the labiatifloral composites (that is, those in which the hermaphrodite or unisexual florets are divided into two lips); the other division, Nassauviaceae, being distinguished from it by certain peculiarities in the structure of the stigma and style.

Observations follow on the decay of the root of Stiftia chrysantha, a labiatifloral Composite, caused by Protomyces radicicolus;