8 KEY TO PLANTS, 
bracteoles present beneath the flower. 
Stamen 1. Grass-like herbs. Fruit 
capsular. Australia and South-east 
Asia. Centroleprdeae. 
(b) Flowers unisexual. Perianth consisting of 
3-6 segments, rarely in the female 
flowers wanting. Stamens 2-3. Grass- 
like herbs. Sheaths of the leaves split. 
Ovary 1. Southern hemisphere. 
Restiaceae. 
14 (a) Sheaths of the cauline and inner radical 
leaves closed. Embryo enclosed in the 
base of the albumen. Testa free from 
the pericarp. Stem usually triangular, 
solid, and without nodes. Leaves usually 
tristichous and without a ligule. Herbs. 
Ovary 1. Fruit indehiscent. Cyperaceae. 
(b) Sheaths of the leaves split. Embryo out- 
side the base of the albumen. Testa 
usually adnate to the pericarp. Stem 
terete or compressed, nodose, between 
the nodes usually hollow. Leaves most 
frequently distichous and with a ligule 
at the base of the blade. Perianth want- 
ing, or reduced to 2-3 scales. Ovary 1. 
Fruit indehiscent. Gramineae. 
15 (a) Anthers 1-celled. Stamens 3, opposite to 
