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The potential suitable areas of four Cistanche species herbs.
| High habitat suitability class (km2) | Moderately suitable class (km2) | Low suitable class (km2) | Not suitable class (km2) | |
|---|---|---|---|---|
| C. deserticola | 29.2210 | 38.9267 | 82.7000 | 21301.2360 |
| C. tubulosa | 10.6866 | 12.4069 | 48.7369 | 21380.2520 |
| C. salsa | 30.8633 | 38.5764 | 83.4967 | 21299.1460 |
| C. sinensis | 31.3034 | 32.1292 | 58.3883 | 21336.2620 |
