I believe this may be a Oriental dogwood as those appear to have the pointed tips of the bracts. Tewhano, those are actually bracts not flowers. The flowers are the part in the center & in your photo the flowers have not bloomed yet. We do commonly refer to the dogwoods as blooming though when the bracts on the trees open.
See:
It can be distinguished from the flowering dogwood (Cornus florida) of eastern North America by its more upright habit, flowering about a month later, and by the pointed rather than rounded flower bracts.
From:
https://en.wikipedia.org/wiki/...
And:
The white, pointed bracts are produced a month later than flowering dogwood and are effective for about a month, sometimes longer.
From:
http://edis.ifas.ufl.edu/st191
And:
the true flowers (which are ornamentally insignificant) are small yellow-green inflorescences centered among the four showy white bracts, the latter of which are obovate and distinctly acuminate, with the diameter of the entire inflorescence being about 3" wide
From:
https://hvp.osu.edu/pocketgard...
And:
The bracts themselves with the flowers and the show that you get are about 4 inches wide, now the interesting thing about this is that you are going to get flowers that have a tapered tip kinda point to it, a lot different than our native flowering dogwood.
From:
http://www.clemson.edu/extensi...
Question
On your dogwoods, do the leaves come out before the flower bracts open?