Table 3. Ecological preferences of 594 Callitriche samples of 9 species and 2 hybrids and co-ocurrence of particular taxa in mixed populations.
| Taxon | Total no. of populations | Mixed with other taxa | Type of habitat* | Average altitude | ||||||||
| ditch | exposed bottom | pool | puddle | reservoir | river (mud) | river (sand) | stream (mud) | stream (sand) | ||||
| C. cophocarpa | 150 | 33 | 23 | 11 | 26 | 28 | 18 | 1 | 1 | 32 | 10 | 398 |
| C. hamulata | 172 | 58 | 1 | 13 | 21 | 17 | 27 | 5 | 45 | 7 | 36 | 411 |
| C. hermaphroditica | 4 | – | – | – | – | – | 4 | – | – | – | – | 442 |
| C. lenisulca | 3 | – | 2 | – | 1 | – | – | – | – | – | – | 83 |
| C. obtusangula | 8 | – | 3 | – | – | – | – | – | 1 | 2 | 2 | 169 |
| C. palustris | 76 | 34 | – | 22 | 1 | 37 | 15 | 1 | – | – | – | 449 |
| C. platycarpa | 49 | 17 | 5 | 1 | 4 | 7 | 8 | 2 | – | 16 | 6 | 306 |
| C. stagnalis | 104 | 33 | 5 | 1 | 4 | 82 | 5 | 1 | – | 4 | 2 | 413 |
| C. stagnalis autotriploid | 1 | – | – | – | – | 1 | – | – | – | – | – | 525 |
| C. ×vigens | 25 | 9 | 2 | 1 | 13 | – | 5 | 2 | 1 | – | 1 | 365 |
| hybrid from Tichá Orlice River | 3 | 3 | – | – | – | – | – | – | 2 | – | 1 | 278 |
| Total number of samples | 595 | 187 | 41 | 49 | 70 | 172 | 82 | 12 | 50 | 61 | 58 | 398 |
| Total number of localities | 495 | 88 | 39 | 38 | 58 | 135 | 69 | 9 | 46 | 53 | 48 | 399 |
| Mixed localities | 88 | 88 | 2 | 9 | 11 | 32 | 11 | 3 | 3 | 8 | 9 | 390 |
* For details, see Materials and Methods.