B is Alocasia 'Poly', actually - A. 'Amazonica' is one of the parents, but the less-deep cutting on the leaves is indicative of Poly.
H is Dieffenbachia seguine, to be more specific. So is J (but a different cultivar).
L might be an Azalea or Rhododendron - you'll be able to confirm this if/when it blooms this fall.
N is Pigeonberry.
O is Justicia brandegeana, sometimes called Shrimp Plant.
P is Xanthosoma violaceum.
V is a Windmill Palm (Trachycarpus fortunei)
Best of luck. The Xanthosoma (P) should be kept in the shade and away from strong winds - the leaves are quite delicate.