There are a few flower variations of Ceiba/Chorisia Speciosa. Some links are below.
http://tree-species.blogspot.com/2007/1 ... tions.html
There are a few varieties and cultivars of this beautiful tree:
C. Speciosa 'Majestic Beauty'
C. Speciosa 'Mongel'
C. Speciosa 'Monsa'
C. Speciosa Angel = 'Mongel'
C. Speciosa Majestic Beauty = 'Monsa'
C. Speciosa v. Minor
C. Speciosa v. Paraguariensis
...just to name a few. I do not know which bloom from links coordinate with the species though.
The only way to lose spines is freezing of the main stem, which rips the outer bark, removing the spines around that area. For an example of this...check out the many C. Speciosa at Bach's on your next visit. They (spines) are also more fragile than they appear, easily being knocked off with a firm touch or hit.
Certainly a stunning and unique landscape addition. Take care in frost, besides that, a pretty easy one to care for. It may need to be slowly acclimated to take the "full" Tucson sun out in your yard. Mine seem to continually get crisped edges on the foliage during the heat of the summer. Thats on top of being watered daily in their containers! Hope that helped.