Thanks Naoki, Ted and Steve.
Steve, yes usually V. denisoniana have a strong and good scent during the evening, ligther scent in the morning and non during the day.
Colors and shapes of sepal-petals can be different with this specie but general caracteristics of V. denisoniana include :
- orange blotch at the base of median lobe/ lip
- lip has 5 lines/crests
- lateral lobes are round and slightly pointed.
Hope it will help and here are some close picts. Do you have a pict of your denisoniana ?