There are three varieties of this tall, fragrant native species, all with different spur or nectary lengths and probably different pollinators, therefore. The picture shows the variety with a spur about equal to the length of the lip, the two other varieties have spurs much shorter or longer than the lip. All three varieties can be seen at the link below.
I would agree on the spur size being a good characteristic for separating varieties. But it wasn't obvious from the pics. I'll have to see them in person.
Tindo, the spurs are often hidden by the flowers and in the bracts, so it's not always so easy to see, but once you have seen all three the difference is obvious.
Nat, thanks for the nice compliment and for looking.