In article , JennyC
writes

1) ALTERNIFOLIA means alternating leaf grows, which means one leaf grows on the
left side of the twig and the next one will then grow on the right side, then
the left again and so on.

2) alternifolia - means “with leaves arranged alternately,” not in pairs or
whorls. Most dogwoods have opposite leaves, but the pagoda dogwood, Cornus
alternifolia, has alternate leaves.

But aren't all buddlejas the same?
--
Jane Ransom in Lancaster.
I won't respond to private emails that are on topic for urg
but if you need to email me for any other reason, put ransoms
at jandg dot demon dot co dot uk where you see