great Yuccas Mike. I'd definitely find out if those trunkers down by the shore are being dug up......those are great specimen plants.
The neighbors blooming Yucca is Y. recurvifolia/gloriosa (hybrid). By the 'book' the difference between gloriosa/recurvifolia are:
Bloom traits:
Y. recurvifolia - the bottom of the flowers start inside the leaf head
Y. gloriosa - the bottom of the flowers start above the leaf head
Seed pod traits:
Y. recurvifolia - are erect
Y. gloriosa - hang down
Leaf traits:
Y. recurvifolia - flexible and hang down
Y. gloriosa - more rigid
Bloom time:
Y. recurvifolia - springtime
Y. gloriosa - blooms in fall with some blooms in spring. May bloom 2x per season.
Seed traits:
Y. recurvifolia - thin and large (like filamentosa)
Y. gloriosa - thick and small (like aloifolia)
The Yucca in the photo has a gloriosa type bloom, blooms in spring like recurvifolia, leaves look like recurvifolia. Seed pods hang or erect??????
Regarding speed of growth. From a small pup, that specimen must be about 10-12 years old. Jim Kelly of NJ sent me a small pup of the same form? Here's a photo from 2006 and 2011.
2006
<img src=
http://i30.photobucket.com/albums/c309/ ... 200622.jpg>
2011 (April photo, beat up from winter)
<img src=
http://i30.photobucket.com/albums/c309/ ... 111718.jpg>
It's not the fastest trunking Yucca. I got one from Tennessee which doubles the rate.