Definition of restio in English:
 restio
nounPlural restios ˈrɛstɪəʊ
A wiry reedlike plant of southern Africa, used for thatching and brooms.
Genus Restio, family Restionaceae: many species
 Example sentencesExamples
-  Restio quadratus is a fast growing restio reaching approx 2m in height, forming a striking clump of architectural foliage when mature.
 -  Restios are dioecious -- meaning male and female flowers are borne on different plants, and sometimes these plants can be quite different in form.
 
Origin
  
Modern Latin (genus name), from Latin restis 'a rope'.