I'm not convinced about the tuberose, but if they were, they would be very fragrant. And if they are the wood hyacinth, they are less than 12" tall. Generally the wood hyacinth (spanish blue bell) flowers are more packed together:
Are you still here watermelon? Give us some more clues. How tall were these flower spikes? Were the flowers fragrant? What do the leaves with them look like?
Yes, I long for a follow-up also. Continuing to babble may help. People get busy, distracted.
Your pic is more than a lovely consolation prize! I've also noticed the Yuccas blooming around here lately. I don't want these plants in my yard, but admire them as drive-by sights, big, striking white spikes.
Saw something yesterday that's similar but HUGE, had a bloom stalk that was around 15 feet. I was going 55... If it hadn't been raining, I would have stopped for a pic of what I'm almost certain was Agave americana (century plant) about to put on a rather large, showy show. Hopefully I will have occasion to drive by it again while the show is going on, for a pic.
A few years ago there was an article in the local paper about a lady who had caught the city maintenance crew about to cut the flower stalk of her century plant because it was a few feet under power lines. Once she explained what it was, they agreed it should be left alone until finished blooming, had a pic of it with the article, the lady and the maintenance guys standing by it. I went by there the next day doing errands and wasn't alone when I stopped to take a look at it. As you can imagine in a really small town, such an interesting story and plant caught a lot of people's attention.