I have been surfing in some plants websites, when I came across this plant. I have been looking for the name of this plant, as I only have the local name (Arum Dalu, Indonesian). I knew this plant when I was still a kid, it was planted at my grandmother's yard back in 1970. The smell was so good that you could smell it from 50 meters. I have difficulty in getting this plant locally, and some vendors (young people) are not familiar with this.
Thanks for submitting beautiful photos, and that reminds me to search again for this plant.