-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.