| PINON | Low-growing pine tree of North America (5) |
| PONDEROSA | Tall pine tree of North America |
| RADIATA | Pine tree of Australia and New Zealand whose wood is used for building timber (7) |
| WHITE | Evergreen coniferous tree of North America such as the Northern ___ (5,5) |
| CEDAR | Evergreen coniferous tree of North America such as the Northern - (5,5) |
| ELDER | Tree of North America and Eurasia |
| ASPEN | Waterside tree of north-west Scotland (5) |
| REDALDER | Broadleaf tree of North America, Alnus rubra (3,5) |
| WHITEOAK | Tree of North America, Quercus alba (5,3) |
| SASSAFRAS | An aromatic deciduous tree of North America with dark blue fruits (9) |
| PAWPAW | Fruit tree of North America, Asimina triloba (6) |
| HICKORY | Nut-bearing tree of North America such as the pignut ? or nutmeg ? |
| REDFIR | Coniferous tree of North America (3,3) |
| SORREL | The - tree of North America is also called sourwood (6) |
| LIVEOAK | Evergreen hardwood tree of North America such as the Southern - whose timber was used in shipbuildin |
| JOJOBA | A shrub or small tree of North America yielding edible seeds containing a valuable oil (6) |
| CASCARA | Small tree of North America whose dried bark is used as a laxative and stimulant (7) |
| CATALPA | Genus of trees of North America, East Asia and the Caribbean with bell-shaped whitish flowers and heart-shaped leaves |
| ELM | American ___ (state tree of North Dakota) |
| POPLAR | Tree of north temperate regions, with flowers borne in catkins (6) |
