Flowers without a proper perianth, but subtended by thin scales called glumes.

This Division includes two very large Orders: Cyperaceae and Gramineae - both of which present many difficulties to the beginner. Accordingly no attempt will be made here to enumerate and describe all the commonly occurring species of these Orders. In chapter XIV., Part I., the student will find descriptions and illustrations of several typical Grasses. We shall here, therefore, only describe two or three of the commonest representatives of the Order Cyperaceae, so as to put the beginner in a position to continue his studies with the aid of Gray's Manual or other advanced work.