Table 3.
Observed and expected numbers of Thesium haustoria in various host-plant families
| Number of haustoria |
|||
|---|---|---|---|
| Family | Observed | Expected | χ2 |
| Fabaceae | 1155 | 1238·8 | 5·7 |
| Poaceae | 2184 | 1021·8 | 1321·9 |
| Asteraceae | 367 | 505·7 | 38·0 |
| Caryophyllaceae | 86 | 465·3 | 309·2 |
| Rosaceae | 14 | 419·0 | 391·5 |
| Cyperaceae | 42 | 195·7 | 120·7 |
| Polygonaceae | 167 | 149·3 | 2·1 |
| Rubiaceae | 25 | 49·3 | 12·0 |
| Oxialidaceae | 9 | 22·9 | 8·5 |
| Violaceae | 30 | 9·8 | 41·8 |
| Total | 4079 | 4079 | 2251·3 |
The expected numbers for Valerianaceae and Crassulaceae were less than five and were thus excluded from the calculation of χ2. Significant chi-squares (χ2 > 16·92, P < 0·05) are in bold.