-petalous (Greek: in botany, a suffix combining form meaning, "having a certain number or a certain shape of petals").andropetalous: 
Made double by having the stamens changed into petals.
 
anisopetalous: 
In botany, with unequal petals.
 
apetalous: 
Without petals.
 
dipetalous: 
Having two petals.
 
enneapetalous: 
Having nine petals.
 
monopetalous: 
With reference to a flower, having the corolla in one piece or the petals united so as to form a tube; also known as gamopetalous and sympetalous.
 
polypetalous: 
Literally, having many petals; but commonly used for having the petals distinct or separate, not coherent or united.
 
stenopetalous: 
Having narrow petals.
 
sympetalous: 
Having the petals united; gamopetalous.
 
tetrapetalous: 
Having four petals.
 
tripetalous: 
Having, or consisting of, three petals.
 
unipetalous: 
A corolla rarely consists of one petal, and when this occurs, it depends on the abortion or non-development of others; such a corolla is quite distinct from monopetalous.
 
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