Category A Photo Gallery
Trees growing with a clearly defined single clean stem measured at 1.5m.
Giant Sequoia often have a flared base and taper quickly. Measure at 1.5m vertically above ground rather than by placing the tape up the sloping trunk.
Most conifers will be category A trees such as this Monkey Puzzle.
Woodland trees usually conform to this category.
This “pedestal” or “pot” Larch creates an interesting feature but can be measured normally at 1.5m