Table 2.
Phenotypic characteristics relating to tree size, canopy, trunk, branching, and flower colour, their descriptions, and the category or unit of measurement recorded for each Eucalyptus leucoxylon tree assessed. DBH (diameter at breast height).
| Characteristic | Description | Categories/units |
|---|---|---|
| Tree height | Using a Silva® clinometer (Silva, Sandy, UT, USA), the top of the tree was sighted from a predetermined distance (usually 20 m) and the correlating angle recorded. Observer height and ground slope were accommodated. | (m) |
| DBH | Measured at 1.3 m | (mm) |
| Canopy spread | Average of canopy spread in a north-south and east-west direction | (m) |
| Canopy density | Estimated by looking from below through the canopy | 1. < 20% |
| 2. 21% to 40% | ||
| 3. 41% to 60% | ||
| 4. 61% to 80% | ||
| 5. > 81% | ||
| Canopy shape | Canopy shape  | 1. Rounded |
| 2. Broadly round | ||
| 3. Oval | ||
| 4. Pyramidal | ||
| 5. Vase | ||
| Evenness | Estimated for both canopy (density evenness) and branches (radial evenness) | 1. Even |
| 2. Minor unevenness | ||
| 3. Severely uneven | ||
| Number of main branches | Number of branches holding the majority of the canopy | 1. One branch (single stem) |
| 2. 2 branches | ||
| 3. 3 branches | ||
| 4. 4 branches | ||
| 5. 5 + branches | ||
| Dominant leader | Does the tree have a dominant leader? | Yes/no |
| Main branch position | The height to the first main (lower order) branch, including missing branches. Can be measured either manually or with a clinometer. | (m) |
| Flower colour | Flower colour was described using the known flower colours for E. leucoxylon. | 1. Red |
| 2. Dark pink | ||
| 3. Light pink | ||
| 4. Orange | ||
| 5. Yellow | ||
| 6. White | ||
| 7. Bicolour | ||
| Trunk taper | The taper as a ratio between the DBH at 1.3 m and the base of the trunk | DBH:diameter at base |
| Trunk straightness | The amount of twisting and kinks present in the main trunk | 1. Very straight |
| 2. Reasonably straight | ||
| 3. Bark twisted, moderately straight | ||
| 4. Trunk moderately kinked and twisted | ||
| 5. Trunk severely kinked and twisted | ||
| Trunk lean | Categories are independent of trunk straightness. | 1. No lean |
| 2. Minor lean | ||
| 3. Major lean | ||
| 4. Extreme lean | ||
| Live crown ratio | When observing the full tree profile, the proportion of height which has live crown is deemed the live crown ratio. | 1. < 20% |
| 2. 21% to 40% | ||
| 3. 41% to 60% | ||
| 4. 61% to 80% | ||
| 5. > 81% |