is also sometimes used as a weed barrier . One particular alpine grassland variant known as juzai is a staple of Kyrgyz , Dungan and Uyghur cooking. [ edit ] Partial species list Cymbopogon ambiguus Australian lemon-scented grass (native of Australia) Cymbopogon bombycinus Silky Oilgrass (native of Australia) Cymbopogon citratus Lemon