Table 2. Numbers of flowering individuals and survived individuals.
| population | 2008 | 2009 | 2010 | 2011 | |
| Mt. Iyu | flowering | – | 0 | 15 | 0 |
| survived/labeled | – | – | 0/15 | – | |
| Mt. Katsuu | flowering* | 0 | 11 | 1882 | 0 |
| survived/labeled | – | 0/11 | 0/21 | – | |
| Mt. Yae | flowering* | 0 | 9 | 1043 | 1 |
| survived/labeled | – | 4/9 | 0/102 | – | |
| Mt. Oppa | flowering | – | 1 | >50 | 0 |
| survived/labeled | – | – | 0/18 | – | |
| Mt. Nago | flowering* | 13 | 6 | 484 | 45 |
| survived/labeled | 0/13 | 0/6 | 0/30 | – | |
| Awa | flowering* | – | 0 | 34 | 31 |
| survived/labeled | – | – | 0/16 | – |
The numbers of flowering individuals for Strobilanthes flexicaulis were enumerated in six populations from 2008 to 2011. We surveyed all flowering individuals at Mt. Iyu, Mt. Oppa, and Awa. The number of survived individuals/labeled individuals is shown in the second row of each locality, where some flowering plants were labeled and their survivals were examined in the following year.
*The chi-square test shows that the synchronicity of Mt. Nago and Awa was significantly lower than Mt. Katsuu and Mt. Yae (Text S1).