1. A perennial rhizomatous grass (Poa pratensis) native to Eurasia and North Africa and naturalized throughout the United States. It is commonly cultivated for pasture and lawns.

2. A rhizomatous Indian herb(Elettaria cardamomum) having capsular fruits with aromatic seeds used as a spice or condiment.

3. On moisture gradient, the patience of bunchgrass stipa to water stress is more strong than rhizomatous grass, which shows Stipa plants more adapt to develop in the arid and semi arid areas.

4. This paper presented the advances in their cultivation and breeding, in order to promote the horticultural study of rhizomatous irises in China.

5. The results showed that the distribution of the plants in the natural conditions was in the form of " aggregated patch" and separated by sex due to its strong rhizomatous growth behaviour.