This is a
genus that is still in debate by
taxonomists
around the world. Most agree to include
about 175 species but there are another 30
or more that are in dispute as to whether
they belong in the genus. Perhaps the key
characteristic to help gardeners identify
pines from other needled evergreens is that
they bear their needles in groups of 2, 3 or
5 rather than having individual needles
emerge directly from the stem as in the
spruces (Picea)
and firs (Abies).
