| 1 | A straw may show which way the wind blows. | |
| 2 | The flowering plants include roses and waterlilies, grasses and oak trees, tulips and orchids. | |
| 3 | The research of semi- permeable layer in grass seed is a field which has been paid rare attention previously. | |
| 4 | Hordeum brevisubulatum is a typical clonal plant of grass family with short rhizome. | |
| 5 | Calamagrostis rigidula is a typical clonal grass, with its tiller nodes kept alive as long as for 4 years. |