King William (Billy) Pine
| Kingdom: plantae |
| Division: spermatophytes (seeded plants) |
| Subdivision: gymnosperms {(naked seed), softwoods} |
| Order: pinales (having reproductive cones) |
| Family: cupressaceae (cypress family) |
| Genus: athrotaxis (A genus of only 2-3 species endemic to Tasmania) |
| Species: selaginoides (The other main species; cupressoides, pencil pine)[(laxifolia; summit or yellow twig athrotaxis. Is it a third species or hybrid?)] |


Image top left; back sawn King BillyPine, and top right quarter sawn King Billy Pine.
Above, bark of King William Pine.
Salmon-pink in colour, straight grained, soft. Was used for boat building, also sounding boards in musical instruments; reputedly one of the best tonal woods in the world. Rare.
| species | dry density kg/m3 | Janka hardness (side grain), dry kN |
| King Billy | 400 | 2.0 |
See also density comparative chart here.