Moon's Graden

Dawn

Anyhow, all flower petals (and sepals) are just modified leaves botanically
speaking, so occasionally you do run into these "leaf-flower-monstrosities".
Some, like this rose, are propagated for novelty value.

If your plant was once a normal rose, I'd bet on a virus or mutation --
but I suppose extreme environmental stresses could do it too...

Kay Klier  Biology Dept  UNI

I have a rose that does something like what Dawn describes. It's a very
vigorous white bourbon. Every year, the first flush of bloom shows what
looks like leaves coming up through center of most of the flowers.
I asked a grower who had a name for the problem (name escapes me at the
moment) and blamed it on too much nitrogen. Later blooms turn out fine.

The two roses on either side of the bourbon (different varieties) have
normal blooms. I cut back on the nitrogen for the first feeding of the
year. I have not noticed an improvement. If the flowers and aroma weren't
so nice, I'd yank that bush out and replace it with another variety.
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: Hm.  Did you have a Mad Botanist living there before you?  Kinda sounds
: like the Green Rose, a species I've forgotten the binomial for.

Rosa chinensis viridiflora.  I love it 8-)

: If your plant was once a normal rose, I'd bet on a virus or mutation --
: but I suppose extreme environmental stresses could do it too...

Occasionally a rose will continue vegetative growth out of a flower bud,
which looks very strange.  I'd recommend the original poster take it to
a person who can actually see it and may be able to help.