I love this 'smelly' dendrobium, my favourite species in the genus. There are slight colour variations within this species, and differences in the lip, depending on locality. Flowering season may differ by a couple of months too. This is a local variety purchased at a recent show:
This one is a true semi-alba variety, anosmum var. huttoni. A weaker grower with skinnier canes that do not completely lose their leaves, buds are more prone to blasting in the heat.